Entangled world!
Entangled world!
2024
September
August SPIE Quantum Communication @ San Diego [Link]
July Hyeokjea Lee gives a contributing talk @ IEEE QCNC [Link] Q-Escape 2024 @ Shenzhen [Link] Kieran Faltt gives a contributing talk
June Woonsang Choi successfully defended his MS thesis. Thesis title: Optimality of Pretty Good Measurements Canada-Korea Conference on Science and Technology, Banff [Link] Symposium in Mathematical Physics, Torun, Poland [Link]
May Quantum lakeside dialogue@University of Jyvaskyla, Finland [Link] Joonwoo Bae serves a PC member @ AQIS2024 [Link]
April Focus Sessions@Korean Mathematical Society (Spring Meeting) [Link] Tutorial@the 1st meeting, Quantum Information Society of Korea [Link]
Joonwoo Bae was awarded a prize (Prime Minister's Commendation) [Link]
March New students: Dongwon Lee for MS Chanmin Park for MS
Jaewan Kim for PhD Lemieux Wang for PhD
February Conference on Photonics, Quantum Information, and Quantum Communication (Centenary of Bose statistics) @ Kolkata [Link] Joonwoo Bae gives an invited talk. Ashutosh Rai gives a contributing talk. Commencement day: Jiyoung Yun Hanwool Lee
January KAIST-MIT Quantum Information Winter School [Link]
Karthik Mohan, Sungwon Yun, and Jaemin Kim give poster presentations in QIP [Link] Joonwoo Bae gives an invited talk at the 34th HSN meeting [Link]
2023
December RIKEN-KAIST-NCKU Joint workshop @ Tainan [Link]
Nagoya-KAIST GEnKO workshop @ Nagoya [Link] Christmas Dinner
November Tutorial "Entanglement" @Quantum2023 [Link] Karthik Mohan gives a talk about "Entanglement Distribution" @ KSIAM Fall meeting KAI-X workshop on Quantum Information @ KAIST "AI and Quantum Information for Partial Physics" [Link] KAIST EE colloquial talk by Eric Chitambar (UIUC)
QEI@Singapore
October QCAI/ITRC colloquial talk by Miguel Navascues (IQOQI, Vienna) Hanwool Lee presents his PhD thesis on Oct. 10.
Panel at Beyond ICFO
Carles Roch i Carceller (co-supervision at DTU) presents his PhD thesis on Oct 23.
KPS Fall meeting
September
QCAI Workshop@ Seoul [Link] K-ICT week@Busan [Link]
Best TA Award (EE, KAIST) to Sung Won Yun!
Jiyoung Yun presents her PhD thesis on Sep 14.
Publication "Detecting Entanglement-Generating Circuits in Cloud-Based Quantum Computing"
spj Intelligent Computing 2 0051 (2023)
Jiheon Seong and Joonwoo Bae
EurekAlert [Link]
August
Invited Talk@ SPIE Quantum Communication, San Diego [Link] KSIAM-NIMS Summer School on Quantum Information @ Busan [Link]
Organizing Asia-Pacific Center for Theoretical Physics Machine Learning [Link]
Asian Quantum Information Sciences (AQIS) 2023@ Seoul [Link]
Ashutosh Rai gives a contributing talk, distillation of nonlocality
Kieran Flatt presents a poster, sequential measurements...
Publication "Entanglement witness measurement of time-bin two-qubit states using fiber-based Franson interferometers" Frontiers in Physics 11 1254044 (2023) Hwang K, Seong J, Park K, Kim J, Pramanik T, Bae J and Shin H
July
Invited Talk@ Canada-Korea Conference (CKC), Ottawa, Canada [Link] Project meeting with Pharmcad and PKNU [Link] SIAM Summer School on Quantum Computing@ Lehigh University
Hyeokjea Kwon and Sungwon Yun Annual meeting, the Korean society for aeronautical and space sciences
Singwon Yun gives a talk, Training quantum measurements Publication "On the structure of mirrored operators obtained from optimal entanglement witnesses" Scientific Reports 13 10733 (2023)
Anindita Bera, Joonwoo Bae, Beatrix Hiesmayr, and Dariusz Chruscinski
June Entanglement Assisted Communication Networks@Taipei, Taiwan Talks@ EACN
Jiyoung Yun gives a contributing talk, nonlocal network coding in interference channel Ashutosh Rai gives a contributing talk, nonlocal network coding in multiple access channel Invited Talk & Poster@ Symposium in Mathematical Physics, Torun, Poland [Link] Talks@ COOC
Jaemin Kim gives a contributing talk, measurement-based detection of entanglement Hyoekjea Kwon gives a contributing talk, quantum feature map
Benasque "Entangle This"
QCAI@Quantum Korea [Link]
Publication "Distilling Nonlocality in Quantum Correlations" Physical Review Letters 130 220201 (2023)
Sahil Gopalkrishna Naik, Govind Lal Sidhardh, Samrat Sen, Arup Roy, Ashutosh Rai, and Manik Banik
May
"Psy was at KAIST" QCAI talk by Thi Ha Kyaw (LG Toronto AI)
April
Invited Talk@ KPS meeting (Spring), Synergy between High Energy Phenomenology and Quantum Information
Joonwoo Bae gives an invited talk, Entanglement Theory: Structure and Certification KAIST EE colloquial talk by Valerio Scarani (CQT, NUS)
New paper 'Nonlocal and quantum advantages in network coding for multiple access channels' @arXiv:2304.10792 [Link]
March 2022 IOP Outstanding Reviewer Awards [Certification, Link] New paper 'Detecting Entanglement by State Preparation and a Fixed Measurement' @arXiv:2303.16368 [Link] New paper 'Feature Map for Quantum Data: Probabilistic Manipulation' @arXiv:2303.15665 [Link]
February
Presentation@QIP, Ghent, Belgium
Ashutosh Rai presents 'Nonlocal network coding for Multiple-Access-Channels (MAC)'
Jiyoung Yun presents 'Nonlocal network coding for Interference Channels'. KAIST-Nagoya GEnKO Workshop [Link]
January Joonwoo Bae gives a talk about Mirrored Entanglement Witnesses @ Quantum Probability and Infinite Dimensional Analysis [Link]
New paper 'On the structure of mirrored operators obtained from optimal entanglement witnesses' @arXiv:2212.14820 [Link] ITRC/QCAI colloquial talk by Anthony Leverrier (INRIA, Paris) 'Quantum Tanner Code'
2022
December Hyeokjea Kwon, Seungchan Seo, and Jiheon Seong participate in Q2B 2022, Santa Clara [Link] Joonwoo Bae gives a talk, Quantum advantages in information theory @ KOFST BrainLink 2022 Quantum Information Sciences [Link] Joonwoo Bae writes a review on the Nobel Prize in Physics 2022 in the KPS magazine [Link] Christmas Dinner The course "Basics of Quantum Information Processing" is available in K-MOOC [Link]
Publication: How many mutually unbiased bases are needed to detect bound entangled states? Journal of Physics A: Mathematical and Theoretical 55 505303 (2022) Joonwoo Bae, Anindita Bera, Dariusz Chruściński, Beatrix C Hiesmayr and Daniel McNulty
November KAIST EE-X Quantum [Link]
Quantum IT, foundations to applications Publication: Correlations in noisy measurements Open Systems & Information Dynamics (OSID) Vol. 29 No. 02 2250009 (2022) Seungchan Seo, Jiheon Seong, and Joonwoo Bae Presentation@KICS Fall, Gyeongju
Jiyoung Yun gives a talk 'Nonlocal network coding based on the CHSH game' Presentation@KSIAM Fall, Jeju Jiyoung Yun gives a talk 'Nonlocal network coding based on the CHSH game' Hyeokjea Kwon gives a talk 'Quantum amplitude amplification operators'
October KPS Fall Meeting
Presentation@KPS Fall, Busan
Jiheon Seong gives a talk 'Purified estimation of observables'
Seungchan Seo gives a talk 'Correlated noise in NISQ devices' Visitor: Andreas Woitzik and Eric Brunner (Uni. Freiburg, Germany-Korea Partnership Project)
Presentation@QuRate, Princeton [Link]
Joonwoo Bae gives a talk 'Entanglement Certification Circuits and Mitigation of Crosstalk Errors' Publication: Single-copy certification of two-qubit gates without entanglement Phys. Rev. Applied 18, 044046 (2022) Yujun Choi, Tanmay Singal, Young-Wook Cho, Sang-Wook Han, Kyunghwan Oh, Sung Moon, Yong-Su Kim, and Joonwoo Bae
September New student: Sungwon Yun for PhD
Woonsang Choi for MS Joonwoo Bae achieved IOP Trusted Reviewer Status [certificate] Publication: Contextual advantages and Certification for Maximum Confidence Discrimination PRX Quantum 3 030307 (2022) Kieran Flatt, Hanwool Lee, Carles Roch i Carceller, Jonathan Bohr Brask, and Joonwoo Bae Publication: Maximum-confidence measurements for qubit states Physical Review A 106, 032422 (2022)
Hanwool Lee, Kieran Flatt, Carles Roch i Carceller, Jonathan Bohr Brask, and Joonwoo Bae
August Invited Presentation@SPIE Quantum Communications and Quantum Imaging, San Diego, the US Dongjin Lee leaves for Perimeter Institute Dr. Yonghae Lee leaves for Kwangwon National University.
July ICQC2022, 'Toward Scalable Quantum Technology' Seoul [Link]
Joonwoo Bae gives a talk, Purified Estimation and Error Mitigation Workshop on Quantum Measurements, Gyeongju
Joonwoo Bae gives a talk, Maximum confidence measurement and contextual advantages
Presentation@Quantum Physics and Logics (QPL), Oxford [Link]
Kieran Flatt gives a talk, contextual advantange and certification of maximum confidence measurements Jaemin Kim presents a poster, quantum network for detecting and activating entanglement Presentation@Conference on the Theory of Quantum... (TQC2022), UIUC [Link] Seungchan Seo presents a poster, Measurement error mitigation Jiheon Seong presents a poster, Detecting entanglement generating circuits Hyeokjea Kwon presents a poster Entanglement and information flow in quantum algorithms Hanwool Lee presents a poster, Contextual advantages in quantum state discrimination Dongjin Lee presents a poster, Constructing entanglement witnesses robust to detector errors. Publication: Quantum vs. Noncontextual Semi-Device-Independent Randomness Certification Physical Review Letters 129 050501 (2022) Carles Roch i Carceller, Kieran Flatt, Hanwool Lee, Joonwoo Bae, and Jonathan Bohr Brask
June Visitor: Carles Roch i Carceller (co-supervision, Denmark Technical Univ.)
Invited talk@CISC-S'22 [Link]
Joonwoo Bae gives a talk, quantum network protocols
Presentation@Quantum Information and Probability (QIP2022) from Foundations to Engineering, Sweden [Link]
Kieran Flatt gives a talk, contextual advantages of maximum confidence measurement
May Visitor: Carles Roch i Carceller (co-supervision, Denmark Technical Univ.)
Presentation@COOC meeting, Busan [Link]
Dongjin Lee gives a talk about experimental loopholes and entanglement detection Hyeokjea Kwon gives a talk about quantum search algorithms Seungchan Seo gives a talk about measurement crosstalk errors in cloud-based quantum computing
April Visitor: Carles Roch i Carceller (co-supervision, Denmark Technical Univ.)
Dongjin Lee, a recipient of the Eun-Jong-Kwan fellowship
Presentation@KPS Spring, online
Hanwool Lee gives a talk about contextual advantages of quantum state discrimination Jiheon Lee gives a talk about entanglement generating circuits in cloud based quantum computing Yonghae Lee gives a tutorial on QISKIT
March New student: Seungchan Seo for PhD
Dongjin Lee for MS
New paper @arXiv:2203.05737 Message: Maximum confidence measurements for qubit states
February Presentation@KICS Winter Conference [Link]
Hyeokjea Kwon gives a talk 'Quantum amplitude amplification operators'
International Conference on Quantum Inforamtion and Foundations [Link]
Ashutosh Rai gives a talk 'Self-testing Quantum States via Non-maximal Bell Violation' Winter School Lecture on Quantum Information Processing (Feat. NISQ) [Link] / [Note]
Publication: Measurement crosstalk errors in cloud-based quantum computing [Link] IEEE Internet Computing Vol 26 Issue 1 page 26-33 (2022) Seungchan Seo and Joonwoo Bae
January Best Paper Award@KICS 2021 Fall Meeting [Link]
Jiheon Seong 'Detecting entanglement generating circuits in cloud-based quantum computing
2021
December Presentation@KSIAM Fall Meeting [Link]
Hyeokjea Kwon gives a talk 'Quantum amplitude amplification operators'
New paper @arXiv:2112.00984 Message: Measurement crosstalk errors in cloud-based quantum computing services are verified.
Seungchan Seo successfully defended his MS thesis. Thesis title: Verification of Correlated Errors in Noisy Quantum Measurements with NISQ Devices
Quantum Technologies Eve@East Coast
New paper* @arXiv:2112.06595 Message: Self-testing non-maximally entangled states by Hardy's nonlocality
New paper @arXiv:2112.09626 Message: Contextual advantages for maximum confidence measurement in a realistic scenario
New paper @arXiv:2112.09678 Message: Randomness certification in quantum vs. noncontextual theories New paper @arXiv:2112.10651 Message: Measurement errors, both individual and crosstalk, can be mitigated.
Publication: Quantum amplitude amplification operators [Link] Physical Review A 104 062438 (2021) Editors' Suggestion Hyeokjea Kwon and Joonwoo BaeNovember Presentations@KICS Fall Meeting [Link]
Seungchan Seo gives a talk 'Measurement crosstalk errors in cloud-based quantum computing' Jiheon Seong gives a talk 'Detecting entanglement generating circuits in cloud-based quantum computing' We resume weekly meetings in the presence of "with COVID-19"
Online courses 'Quantum Information' are now open @ KAIST MOOC (Korean) [Link] and @ Coursera (English) [Link]
Publication: Belief-invariant and quantum equilibria in games of incomplete information Theoretical Computer Science, Vol 895 4 151-177 (2021)
V. Auletta, D. Ferraioli, A. Rai, G. Scarpa, and A. Winter Workshop on Quantum Information Theory (online) organized by Dr. Yonghae LeeOctober New paper @arXiv:2110.10528 Message: Detecting entanglement generation in a cloud-based quantum computing service (when qubit allocations are not in users' hands)
IEC Quantum White Paper is published [Link]September Publication: Detecting entanglement can be more effective with inequivalent mutually unbiased bases,
New. J. Phys 23 093018 (2021) [Link] with B. Hiesmayr (Univ. of Vienna, Austria), D. McNulty (Univ. Aberystwyth, the UK), S. Baek (Hanyang Univ.),
S. Roy (CSIC, Madrid), and D. Chruscinski (Nicolaus Copernicus University, Torun, Poland) Publication: A hybrid quantum-classical approach to mitigating measurement errors in quantum algorithms IEEE Transactions on Computers, Vol 70 (9) 1401 (2021)
Hyeokjea Kwon and Joonwoo Bae New student: Hyeokjea Kwon for PhD August Invited Presentation@SPIE Quantum Communications and Quantum Imaging, San Diego, the US
ICMP2021 - International Congress on Mathematical Physics [Link]
Jiyoung Yun presents nonlocal network channel coding. ITRC summer school
Hyeokjea Kwon successfully defended his MS thesis.
Thesis title: Mitigating Measurement Readout Errors in NISQ Device
New paper @arXiv:2108.01109 Message: This is marvelous, hard to describe, a very interesting paper.
July TQC2021 - 16th Conference on the Theory of Quantum Computation, Communication, and Cryptography [Link]
Hyeokjea Kwon presents quantum amplitude amplification operators
IEC meetingJune 52 Symposium on Mathematical Physics - "Channels, Maps and All That" [Link]
Summer School on QIQT 2021 [Link] Ashutosh Rai gives a lecture in the summer school
IEC meeting
Publication: Device-independent bounds from Cabello's nonlocality argument
Phys. Rev. A. 103 062219 (2021) Ashutosh Rai Quantum Harvest @ KAISTMay GEnKO seminar series (Freiburg, Nagoya, RIKEN, NCKU Tainan, Oxford, KAIST...)
Jiheon Seong presents 'Architecture for entanglement generating circuits'
Hyeokjea Kwon presents 'quantum amplitude amplification operators'
Seungchan Seo presents 'Mitigation of crosstalk errors in a quantum measurement'
New paper @arXiv:2105.09559 Message: Quantum Amplitude Amplification Operators April IEC meetingMarch GEnKO workshop (Freiburg, Nagoya, RIKEN, NCKU Tainan, Oxford, KAIST...) APS March Meeting, the US Kieran speaks at Quantum Foundation [Link]
The First Wednesday Multidisciplinary Forum @ KAIST
Joonwoo Bae speaks about quantum information
New students : Jaemin Kim for MS, K. Mohan for PhD.
February Invited Presentation@OSK Winter Meeting, Korea
Joonwoo Bae speaks Quantum Communication Invited Presentation, NCTS Annual Theory Meeting, Taiwan [Link]
Joonwoo Bae speaks Entanglement Witness 2.0January Highlighted in NRF magazine [Link] New Year Brunch
IEC meeting 2020December GEnKO seminar series (Freiburg, Nagoya, RIKEN, NCKU Tainan, Oxford, KAIST...)
Qualcomm Innovation Fellowship Korea 2020
New paper@arXiv:2011.15078 Message: We begin to mind inequivalent MUBs. AQIS'20 (Asia Quantum Information Science) [online event due to COVID-19] Hyeokjea Kwon 'Mitigation of measurement readout errors' Mini-workshop (internal) 'Quantum Christmas for Quantum Summer'
Christmas dinner at a restaurant [cancelled due to COVID-19] -> Christmas dinner at home :-)
New device arrived at the office Publication: Optimal measurement preserving qubit channels
New J. Phys. 22 123024 (2020) Spiros Kechrimparis and Joonwoo Bae News: Joonwoo Bae, Y-KAST memeber
November National Chen Kung Univ. Taiwan [cancelled due to COVID-19]
IBM Quantum Machine Learning
The logo QIT@KAIST is prepared by Seungchan Seo
wit
October Fall Meeting in Korea Mathematics Society : Focus Session in Quantum Computation and Quantum Information [online event due to COVID-19]
Joonwoo Bae 'A hierarchy in the completely bounded trace norm : the more entangled, the more useful' Conference on Quantum Annealing/Adiabatic Quantum Computation [Link] @The Abdus Salam International Centre for Theoretical Physics Publication: Non-Local Network Coding in Interference Channels
Physical Review Letters 125 150502 (2020) [Link], Jiyoung Yun, Ashutosh Rai and Joonwoo Bae ZOOM seminar : Thi Ha Kyaw (Univ. of Toronto) 'NISQ proposal'
September Kick-off workshop KAIST-Freiburg-Nagoya [online event due to COVID-19] Kieran Flatt 'Quantum advantages in state discrimination' Hanwool Lee 'Certification of maximum confidence measurement' Hyeokjea Kwon 'Mitigation of measure readout errors' [view] Seungchan Seo 'Quantum detector tomography on IBM Q' [view]
New students : M. Kim for MS, J. Seong for PhD. August Invited Presentation@SPIE Quantum Communications and Quantum Imagine, San Diego, the US [online event due to COVID-19]
Joonwoo Bae 'Measurement protected quantum key distribution' Lecture at ITRC Summer School [Link] [online event due to COVID-19] Joonwoo Bae 'Introduction to quantum computing and quantum information' Tutorial@Quantum Information Conference [Link] [online event due to COVID-19]
Joonwoo Bae 'Quantum communication and quantum correlations' Invited Talk@International Conference on Quantum Computing [Link] [online event due to COVID-19] Joonwoo Bae 'Entanglement Witness 2.0'July Spring Meeting in Korea Mathematics Society : special session in Quantum Information Theory [online event due to COVID-19] Jiyoung Yun 'Nonlocal Network Coding in Interference Channels' Hyeokjea Kwon 'A hybrid quantum-classical approach to mitigating measurement errors' New paper @arXiv:2006.16366 Message: Optimal measurement preserving channels for qubits ZOOM seminar : Ashutosh Rai
Publication: A hybrid quantum-classical approach to mitigating measurement errors in quantum algorithms,
IEEE Transactions on Computers [Link], Hyeokjea Kwon and Joonwoo BaeJune Invited talk@Symposium on Mathematical Physics, "Channels, Maps, and All That", Torun, Poland [cancelled due to COVID-19]May New paper @arXiv:2005.02378 Message: Quantum channel discrimination is applied to certifying two-qubit gates Erratum, IEEE JSAC Vol 38, No 5, 980 (2020) Link to Channel Coding of a Quantum Measurement, IEEE Journal on Selected Areas in Communications, Vol 38, No 3, 439 (2020) ZOOM seminar : Chee Kong Lee (Tencent America) 'Unitary coupled restricted Boltzmann machine for quantum simulations'April National Chen Kung Univ. Taiwan [cancelled due to COVID-19] Spring Meeting in Korea Mathematics Society : special session in Quantum Information Theory [postponed due to COVID-19] Publication: Channel Coding of a Quantum Measurement,
IEEE Journal on Selected Areas in Communications, Vol 38, No 3, 439 (2020) S. Kechrimparis (KAIST), C. M. Kropf (INFN, Italy), F. Wudarski (QuAIL @ NASA, the US), and J. Bae* (KAIST) *corresponding authorMarch Visitor : Hong-Bin Chen (National Chen Kung University, Taiwan) [cancelled due to COVID-19] Special Issue in Electronics: Quantum Information Theory [Link] New students : H. Lee for PhD, S. Seo for MS, S. Lee for technical MS. New paper @arXiv:2003.11867 Message: Non-locality is useful in network coding although more non-locality does not necessarily imply a higher channel capacity New paper @arXiv:2003.12314 Message: Measurement readout errors can be mitigated by a hybrid quantum-classical prescription February Publication: Mirrored Entanglement Witnesses, npj Quantum Information 6 15 (2020) [Link] with D. Chruscinski (Nicolaus Copernicus University, Torun, Poland) and B. Hiesmayr (Univ. of Vienna, Austria) Visitor : Chee Kong Lee (Tencent America, Palo Alto CA) January GEnKO approved (Freiburg-KAIST-Nagoya) 2019December Workshop @Quantum information processing in non-Markovian quantum complex systems, Nagoya, Japan [Link] Visitors : H.-D. Yuan (Chinese Univ. of Hong Kong) Talk@Particle Physics in Computing Frontier, IBS,Korea [Link] Talk@Photonics Conference 2019 [Link] Talk@Winter Camp on Particle Physics [Link] New paper @arXiv:1912.00768 Message: QKD protocols can be implemented with a fixed optimal measurement.November Visitors : D. McNulty (Aberystwyth Univ., the UK) October Conference @Quantum Techniques in Machine Learning 2019 [Link] Visitors : T. Heinosaari (Univ. Turku, Finland), D. McNulty (Aberystwyth Univ., the UK) September @DPG, Freiburg : Contributing talk "Entanglement Witness 2.0" (Mirrored Entanglement Witnesses) Visitors : J. Suzuki (Univ. of Electro-Communications, Japan) New students : J. Yun for PhD, H. Kwon for MS. Publication: Information-theoretic meaning of quantum information flow and its applications to amplitude amplification algorithms, Phys. Rev. A 100, 032303 (2019) [Link] with Sudipto Singha Roy (now in CSIC, Spain)
August Invited talk @SPIE San Diego, the US "Optimal state discrimination over quantum channels" @AQIS19, Seoul : optimal state discrimination over quantum channels (Spiros), Geometry of the quantum set on no-signaling faces (Ashutosh) @QCrypt19, Montreal : secure quantum communication by preserving an optimal measurement (Joonwoo) @ITRC summer school, KAIST KAIST-ETRI 0.5 workshop Publication: Quantifying the nonclassicality of pure dephasing, Nature Communications 10 3794 (2019) [Link] with Clemens Gneiting and Franco Nori (RIKEN, Japan), Ping-Yuan Lo (National Chiao Tung Univ., Taiwan) Hong-Bin Chen, Yueh-Nan Chen (National Chen Kung Univ., Taiwan) New paper @arXiv: 1908.10735 Message: Protection of a setting of a measurement when quantum states suffer from unwanted interactions with an environmentJuly Conference@Benasque Quantum Information 2019 [Link] Invited Talk @LPHYS, Gyeongju, Korea [Link] @ICQC2019, SeoulJune Invited Talk @COOC 2019, Korea Publication: Preserving measurements for optimal state discrimination over quantum channels, Physical Review A 99 062302 (2019) Conference@Benasque Quantum Information 2019 [Link]May Exploring Open Quantum Systems in Quantum Simulators @ KITP, Santa Barbara Visitors : D. McNulty (Aberystwyth Univ., the UK), Hui Khoon Ng (NUS-Yale, Singapore), Nilanjana Datta (Univ. of Cambridge, the UK) Conference @Mathematical Aspects of Quantum Information Theory [Link] Invited Lecture @School of Mesoscopic Physics, APCTP, Korea [Link] Regular meeting QuIST @KAISTApril KAIST-KIST 0.5 workshop Publication: More Entanglement Implies Higher Performance in Channel Discrimination Tasks, Physical Review Letters 122 140404 (2019) with Dariusz Chruscinski (Nicolaus Copernicus Univ., Torun, Poland) and Marco Piani (Univ. of Strathclyde, the UK) New Direction in Quantum Information @ Nordita, Stockholm March Finally, our lab. QIT@KAIST, here ITRC QCAI workshop Welcome on board, Ashutosh Rai! February Visit@CQT, NUS Singapore Invited Talk @KICS, Korea : Introduction to Quantum Computation and Quantum Cryptographic ProtocolsJanuary Publication: Linking entanglement detection and state tomography via quantum 2-designs, New Journal of Physics 21 013012 (2019) [Link] with Beatrix Hiesmayr (Univ. of Vienna, Austria) and Daniel McNulty (Aberystwyth Univ., the UK) Contributed Talk @KICS, Korea : Qubit State Discrimination over a Quantum Channel2018December New paper @arXiv: 1812.02087 Message: Noise in entangling gates can be detected without more of entangling resources Invited Talk @QIPA 2018, Harish Chandra Research Institute (HRI), India Visitors : Beatrix Hiesmayr (Univ. of Vienna, Austria) Revision @arXiv:1805.05111 Message: Open quantum system approach to quantum algorithm, and its information-theoretic interpretation: information flow can characterize the computational speedup of quantum algorithms Finally, moving to a new office! November New paper @arXiv: 1811.07721 Message: Optimal measurement prepared in a laboratory would be forever optimal by LOCC Visitors: Tobias Bruenner (Freiburg, Germany) and C. Kropf (INFN, Italy) New paper@arXiv:1811.09053 collaboration with NCKU, NCTU (Taiwan) and RIKEN (Tokyo) Message: Quantification of nonclassical dynamics New paper@arXiv:1811.09896 collaboration with D. Chruscinski (Torun) and B. Hiesmayr (Vienna) Message: Entanglement witnesses are much more useful : the capabilities of different entanglement witnesses can be compressed to a single one. October Visit @CUHK, Hong Kong, talking about "Quantum channels constrained by entanglement"September Conference @AQIS'18 / program committee, session chair, poster presentation New paper @arXiv:1809.06133 collaboration with P. Aniello (Napoli) and D. Chruscinski (Torun) Message: Entropic characterizations to non-Markovianity New paper @arXiv:1809.02082 collaboration with D. Chruscinski (Torun) and M. Piani (Glasgow) Message: The more entangled, the more useful in quantum channel discrimination All the best to Dr. Sudipto Singha Roy, now in UAM-CSIC (Madrid) Visitors: B. Regula (Univ. Nottingham, the UK)August Invited talk @SPIE San Diego, the US "how useful a single entanglement witness is?"July Conference@Beyond IID Cambridge, the UK, poster about "information flow in quantum algorithms" We're new at KAIST
September
August SPIE Quantum Communication @ San Diego [Link]
July Hyeokjea Lee gives a contributing talk @ IEEE QCNC [Link] Q-Escape 2024 @ Shenzhen [Link] Kieran Faltt gives a contributing talk
June Woonsang Choi successfully defended his MS thesis. Thesis title: Optimality of Pretty Good Measurements Canada-Korea Conference on Science and Technology, Banff [Link] Symposium in Mathematical Physics, Torun, Poland [Link]
May Quantum lakeside dialogue@University of Jyvaskyla, Finland [Link] Joonwoo Bae serves a PC member @ AQIS2024 [Link]
April Focus Sessions@Korean Mathematical Society (Spring Meeting) [Link] Tutorial@the 1st meeting, Quantum Information Society of Korea [Link]
Joonwoo Bae was awarded a prize (Prime Minister's Commendation) [Link]
March New students: Dongwon Lee for MS Chanmin Park for MS
Jaewan Kim for PhD Lemieux Wang for PhD
February Conference on Photonics, Quantum Information, and Quantum Communication (Centenary of Bose statistics) @ Kolkata [Link] Joonwoo Bae gives an invited talk. Ashutosh Rai gives a contributing talk. Commencement day: Jiyoung Yun Hanwool Lee
January KAIST-MIT Quantum Information Winter School [Link]
Karthik Mohan, Sungwon Yun, and Jaemin Kim give poster presentations in QIP [Link] Joonwoo Bae gives an invited talk at the 34th HSN meeting [Link]
2023
December RIKEN-KAIST-NCKU Joint workshop @ Tainan [Link]
Nagoya-KAIST GEnKO workshop @ Nagoya [Link] Christmas Dinner
November Tutorial "Entanglement" @Quantum2023 [Link] Karthik Mohan gives a talk about "Entanglement Distribution" @ KSIAM Fall meeting KAI-X workshop on Quantum Information @ KAIST "AI and Quantum Information for Partial Physics" [Link] KAIST EE colloquial talk by Eric Chitambar (UIUC)
QEI@Singapore
October QCAI/ITRC colloquial talk by Miguel Navascues (IQOQI, Vienna) Hanwool Lee presents his PhD thesis on Oct. 10.
Panel at Beyond ICFO
Carles Roch i Carceller (co-supervision at DTU) presents his PhD thesis on Oct 23.
KPS Fall meeting
September
QCAI Workshop@ Seoul [Link] K-ICT week@Busan [Link]
Best TA Award (EE, KAIST) to Sung Won Yun!
Jiyoung Yun presents her PhD thesis on Sep 14.
Publication "Detecting Entanglement-Generating Circuits in Cloud-Based Quantum Computing"
spj Intelligent Computing 2 0051 (2023)
Jiheon Seong and Joonwoo Bae
EurekAlert [Link]
August
Invited Talk@ SPIE Quantum Communication, San Diego [Link] KSIAM-NIMS Summer School on Quantum Information @ Busan [Link]
Organizing Asia-Pacific Center for Theoretical Physics Machine Learning [Link]
Asian Quantum Information Sciences (AQIS) 2023@ Seoul [Link]
Ashutosh Rai gives a contributing talk, distillation of nonlocality
Kieran Flatt presents a poster, sequential measurements...
Publication "Entanglement witness measurement of time-bin two-qubit states using fiber-based Franson interferometers" Frontiers in Physics 11 1254044 (2023) Hwang K, Seong J, Park K, Kim J, Pramanik T, Bae J and Shin H
July
Invited Talk@ Canada-Korea Conference (CKC), Ottawa, Canada [Link] Project meeting with Pharmcad and PKNU [Link] SIAM Summer School on Quantum Computing@ Lehigh University
Hyeokjea Kwon and Sungwon Yun Annual meeting, the Korean society for aeronautical and space sciences
Singwon Yun gives a talk, Training quantum measurements Publication "On the structure of mirrored operators obtained from optimal entanglement witnesses" Scientific Reports 13 10733 (2023)
Anindita Bera, Joonwoo Bae, Beatrix Hiesmayr, and Dariusz Chruscinski
June Entanglement Assisted Communication Networks@Taipei, Taiwan Talks@ EACN
Jiyoung Yun gives a contributing talk, nonlocal network coding in interference channel Ashutosh Rai gives a contributing talk, nonlocal network coding in multiple access channel Invited Talk & Poster@ Symposium in Mathematical Physics, Torun, Poland [Link] Talks@ COOC
Jaemin Kim gives a contributing talk, measurement-based detection of entanglement Hyoekjea Kwon gives a contributing talk, quantum feature map
Benasque "Entangle This"
QCAI@Quantum Korea [Link]
Publication "Distilling Nonlocality in Quantum Correlations" Physical Review Letters 130 220201 (2023)
Sahil Gopalkrishna Naik, Govind Lal Sidhardh, Samrat Sen, Arup Roy, Ashutosh Rai, and Manik Banik
May
"Psy was at KAIST" QCAI talk by Thi Ha Kyaw (LG Toronto AI)
April
Invited Talk@ KPS meeting (Spring), Synergy between High Energy Phenomenology and Quantum Information
Joonwoo Bae gives an invited talk, Entanglement Theory: Structure and Certification KAIST EE colloquial talk by Valerio Scarani (CQT, NUS)
New paper 'Nonlocal and quantum advantages in network coding for multiple access channels' @arXiv:2304.10792 [Link]
March 2022 IOP Outstanding Reviewer Awards [Certification, Link] New paper 'Detecting Entanglement by State Preparation and a Fixed Measurement' @arXiv:2303.16368 [Link] New paper 'Feature Map for Quantum Data: Probabilistic Manipulation' @arXiv:2303.15665 [Link]
February
Presentation@QIP, Ghent, Belgium
Ashutosh Rai presents 'Nonlocal network coding for Multiple-Access-Channels (MAC)'
Jiyoung Yun presents 'Nonlocal network coding for Interference Channels'. KAIST-Nagoya GEnKO Workshop [Link]
January Joonwoo Bae gives a talk about Mirrored Entanglement Witnesses @ Quantum Probability and Infinite Dimensional Analysis [Link]
New paper 'On the structure of mirrored operators obtained from optimal entanglement witnesses' @arXiv:2212.14820 [Link] ITRC/QCAI colloquial talk by Anthony Leverrier (INRIA, Paris) 'Quantum Tanner Code'
2022
December Hyeokjea Kwon, Seungchan Seo, and Jiheon Seong participate in Q2B 2022, Santa Clara [Link] Joonwoo Bae gives a talk, Quantum advantages in information theory @ KOFST BrainLink 2022 Quantum Information Sciences [Link] Joonwoo Bae writes a review on the Nobel Prize in Physics 2022 in the KPS magazine [Link] Christmas Dinner The course "Basics of Quantum Information Processing" is available in K-MOOC [Link]
Publication: How many mutually unbiased bases are needed to detect bound entangled states? Journal of Physics A: Mathematical and Theoretical 55 505303 (2022) Joonwoo Bae, Anindita Bera, Dariusz Chruściński, Beatrix C Hiesmayr and Daniel McNulty
November KAIST EE-X Quantum [Link]
Quantum IT, foundations to applications Publication: Correlations in noisy measurements Open Systems & Information Dynamics (OSID) Vol. 29 No. 02 2250009 (2022) Seungchan Seo, Jiheon Seong, and Joonwoo Bae Presentation@KICS Fall, Gyeongju
Jiyoung Yun gives a talk 'Nonlocal network coding based on the CHSH game' Presentation@KSIAM Fall, Jeju Jiyoung Yun gives a talk 'Nonlocal network coding based on the CHSH game' Hyeokjea Kwon gives a talk 'Quantum amplitude amplification operators'
October KPS Fall Meeting
Presentation@KPS Fall, Busan
Jiheon Seong gives a talk 'Purified estimation of observables'
Seungchan Seo gives a talk 'Correlated noise in NISQ devices' Visitor: Andreas Woitzik and Eric Brunner (Uni. Freiburg, Germany-Korea Partnership Project)
Presentation@QuRate, Princeton [Link]
Joonwoo Bae gives a talk 'Entanglement Certification Circuits and Mitigation of Crosstalk Errors' Publication: Single-copy certification of two-qubit gates without entanglement Phys. Rev. Applied 18, 044046 (2022) Yujun Choi, Tanmay Singal, Young-Wook Cho, Sang-Wook Han, Kyunghwan Oh, Sung Moon, Yong-Su Kim, and Joonwoo Bae
September New student: Sungwon Yun for PhD
Woonsang Choi for MS Joonwoo Bae achieved IOP Trusted Reviewer Status [certificate] Publication: Contextual advantages and Certification for Maximum Confidence Discrimination PRX Quantum 3 030307 (2022) Kieran Flatt, Hanwool Lee, Carles Roch i Carceller, Jonathan Bohr Brask, and Joonwoo Bae Publication: Maximum-confidence measurements for qubit states Physical Review A 106, 032422 (2022)
Hanwool Lee, Kieran Flatt, Carles Roch i Carceller, Jonathan Bohr Brask, and Joonwoo Bae
August Invited Presentation@SPIE Quantum Communications and Quantum Imaging, San Diego, the US Dongjin Lee leaves for Perimeter Institute Dr. Yonghae Lee leaves for Kwangwon National University.
July ICQC2022, 'Toward Scalable Quantum Technology' Seoul [Link]
Joonwoo Bae gives a talk, Purified Estimation and Error Mitigation Workshop on Quantum Measurements, Gyeongju
Joonwoo Bae gives a talk, Maximum confidence measurement and contextual advantages
Presentation@Quantum Physics and Logics (QPL), Oxford [Link]
Kieran Flatt gives a talk, contextual advantange and certification of maximum confidence measurements Jaemin Kim presents a poster, quantum network for detecting and activating entanglement Presentation@Conference on the Theory of Quantum... (TQC2022), UIUC [Link] Seungchan Seo presents a poster, Measurement error mitigation Jiheon Seong presents a poster, Detecting entanglement generating circuits Hyeokjea Kwon presents a poster Entanglement and information flow in quantum algorithms Hanwool Lee presents a poster, Contextual advantages in quantum state discrimination Dongjin Lee presents a poster, Constructing entanglement witnesses robust to detector errors. Publication: Quantum vs. Noncontextual Semi-Device-Independent Randomness Certification Physical Review Letters 129 050501 (2022) Carles Roch i Carceller, Kieran Flatt, Hanwool Lee, Joonwoo Bae, and Jonathan Bohr Brask
June Visitor: Carles Roch i Carceller (co-supervision, Denmark Technical Univ.)
Invited talk@CISC-S'22 [Link]
Joonwoo Bae gives a talk, quantum network protocols
Presentation@Quantum Information and Probability (QIP2022) from Foundations to Engineering, Sweden [Link]
Kieran Flatt gives a talk, contextual advantages of maximum confidence measurement
May Visitor: Carles Roch i Carceller (co-supervision, Denmark Technical Univ.)
Presentation@COOC meeting, Busan [Link]
Dongjin Lee gives a talk about experimental loopholes and entanglement detection Hyeokjea Kwon gives a talk about quantum search algorithms Seungchan Seo gives a talk about measurement crosstalk errors in cloud-based quantum computing
April Visitor: Carles Roch i Carceller (co-supervision, Denmark Technical Univ.)
Dongjin Lee, a recipient of the Eun-Jong-Kwan fellowship
Presentation@KPS Spring, online
Hanwool Lee gives a talk about contextual advantages of quantum state discrimination Jiheon Lee gives a talk about entanglement generating circuits in cloud based quantum computing Yonghae Lee gives a tutorial on QISKIT
March New student: Seungchan Seo for PhD
Dongjin Lee for MS
New paper @arXiv:2203.05737 Message: Maximum confidence measurements for qubit states
February Presentation@KICS Winter Conference [Link]
Hyeokjea Kwon gives a talk 'Quantum amplitude amplification operators'
International Conference on Quantum Inforamtion and Foundations [Link]
Ashutosh Rai gives a talk 'Self-testing Quantum States via Non-maximal Bell Violation' Winter School Lecture on Quantum Information Processing (Feat. NISQ) [Link] / [Note]
Publication: Measurement crosstalk errors in cloud-based quantum computing [Link] IEEE Internet Computing Vol 26 Issue 1 page 26-33 (2022) Seungchan Seo and Joonwoo Bae
January Best Paper Award@KICS 2021 Fall Meeting [Link]
Jiheon Seong 'Detecting entanglement generating circuits in cloud-based quantum computing
2021
December Presentation@KSIAM Fall Meeting [Link]
Hyeokjea Kwon gives a talk 'Quantum amplitude amplification operators'
New paper @arXiv:2112.00984 Message: Measurement crosstalk errors in cloud-based quantum computing services are verified.
Seungchan Seo successfully defended his MS thesis. Thesis title: Verification of Correlated Errors in Noisy Quantum Measurements with NISQ Devices
Quantum Technologies Eve@East Coast
New paper* @arXiv:2112.06595 Message: Self-testing non-maximally entangled states by Hardy's nonlocality
New paper @arXiv:2112.09626 Message: Contextual advantages for maximum confidence measurement in a realistic scenario
New paper @arXiv:2112.09678 Message: Randomness certification in quantum vs. noncontextual theories New paper @arXiv:2112.10651 Message: Measurement errors, both individual and crosstalk, can be mitigated.
Publication: Quantum amplitude amplification operators [Link] Physical Review A 104 062438 (2021) Editors' Suggestion Hyeokjea Kwon and Joonwoo BaeNovember Presentations@KICS Fall Meeting [Link]
Seungchan Seo gives a talk 'Measurement crosstalk errors in cloud-based quantum computing' Jiheon Seong gives a talk 'Detecting entanglement generating circuits in cloud-based quantum computing' We resume weekly meetings in the presence of "with COVID-19"
Online courses 'Quantum Information' are now open @ KAIST MOOC (Korean) [Link] and @ Coursera (English) [Link]
Publication: Belief-invariant and quantum equilibria in games of incomplete information Theoretical Computer Science, Vol 895 4 151-177 (2021)
V. Auletta, D. Ferraioli, A. Rai, G. Scarpa, and A. Winter Workshop on Quantum Information Theory (online) organized by Dr. Yonghae LeeOctober New paper @arXiv:2110.10528 Message: Detecting entanglement generation in a cloud-based quantum computing service (when qubit allocations are not in users' hands)
IEC Quantum White Paper is published [Link]September Publication: Detecting entanglement can be more effective with inequivalent mutually unbiased bases,
New. J. Phys 23 093018 (2021) [Link] with B. Hiesmayr (Univ. of Vienna, Austria), D. McNulty (Univ. Aberystwyth, the UK), S. Baek (Hanyang Univ.),
S. Roy (CSIC, Madrid), and D. Chruscinski (Nicolaus Copernicus University, Torun, Poland) Publication: A hybrid quantum-classical approach to mitigating measurement errors in quantum algorithms IEEE Transactions on Computers, Vol 70 (9) 1401 (2021)
Hyeokjea Kwon and Joonwoo Bae New student: Hyeokjea Kwon for PhD August Invited Presentation@SPIE Quantum Communications and Quantum Imaging, San Diego, the US
ICMP2021 - International Congress on Mathematical Physics [Link]
Jiyoung Yun presents nonlocal network channel coding. ITRC summer school
Hyeokjea Kwon successfully defended his MS thesis.
Thesis title: Mitigating Measurement Readout Errors in NISQ Device
New paper @arXiv:2108.01109 Message: This is marvelous, hard to describe, a very interesting paper.
July TQC2021 - 16th Conference on the Theory of Quantum Computation, Communication, and Cryptography [Link]
Hyeokjea Kwon presents quantum amplitude amplification operators
IEC meetingJune 52 Symposium on Mathematical Physics - "Channels, Maps and All That" [Link]
Summer School on QIQT 2021 [Link] Ashutosh Rai gives a lecture in the summer school
IEC meeting
Publication: Device-independent bounds from Cabello's nonlocality argument
Phys. Rev. A. 103 062219 (2021) Ashutosh Rai Quantum Harvest @ KAISTMay GEnKO seminar series (Freiburg, Nagoya, RIKEN, NCKU Tainan, Oxford, KAIST...)
Jiheon Seong presents 'Architecture for entanglement generating circuits'
Hyeokjea Kwon presents 'quantum amplitude amplification operators'
Seungchan Seo presents 'Mitigation of crosstalk errors in a quantum measurement'
New paper @arXiv:2105.09559 Message: Quantum Amplitude Amplification Operators April IEC meetingMarch GEnKO workshop (Freiburg, Nagoya, RIKEN, NCKU Tainan, Oxford, KAIST...) APS March Meeting, the US Kieran speaks at Quantum Foundation [Link]
The First Wednesday Multidisciplinary Forum @ KAIST
Joonwoo Bae speaks about quantum information
New students : Jaemin Kim for MS, K. Mohan for PhD.
February Invited Presentation@OSK Winter Meeting, Korea
Joonwoo Bae speaks Quantum Communication Invited Presentation, NCTS Annual Theory Meeting, Taiwan [Link]
Joonwoo Bae speaks Entanglement Witness 2.0January Highlighted in NRF magazine [Link] New Year Brunch
IEC meeting 2020December GEnKO seminar series (Freiburg, Nagoya, RIKEN, NCKU Tainan, Oxford, KAIST...)
Qualcomm Innovation Fellowship Korea 2020
New paper@arXiv:2011.15078 Message: We begin to mind inequivalent MUBs. AQIS'20 (Asia Quantum Information Science) [online event due to COVID-19] Hyeokjea Kwon 'Mitigation of measurement readout errors' Mini-workshop (internal) 'Quantum Christmas for Quantum Summer'
Christmas dinner at a restaurant [cancelled due to COVID-19] -> Christmas dinner at home :-)
New device arrived at the office Publication: Optimal measurement preserving qubit channels
New J. Phys. 22 123024 (2020) Spiros Kechrimparis and Joonwoo Bae News: Joonwoo Bae, Y-KAST memeber
November National Chen Kung Univ. Taiwan [cancelled due to COVID-19]
IBM Quantum Machine Learning
The logo QIT@KAIST is prepared by Seungchan Seo
wit
October Fall Meeting in Korea Mathematics Society : Focus Session in Quantum Computation and Quantum Information [online event due to COVID-19]
Joonwoo Bae 'A hierarchy in the completely bounded trace norm : the more entangled, the more useful' Conference on Quantum Annealing/Adiabatic Quantum Computation [Link] @The Abdus Salam International Centre for Theoretical Physics Publication: Non-Local Network Coding in Interference Channels
Physical Review Letters 125 150502 (2020) [Link], Jiyoung Yun, Ashutosh Rai and Joonwoo Bae ZOOM seminar : Thi Ha Kyaw (Univ. of Toronto) 'NISQ proposal'
September Kick-off workshop KAIST-Freiburg-Nagoya [online event due to COVID-19] Kieran Flatt 'Quantum advantages in state discrimination' Hanwool Lee 'Certification of maximum confidence measurement' Hyeokjea Kwon 'Mitigation of measure readout errors' [view] Seungchan Seo 'Quantum detector tomography on IBM Q' [view]
New students : M. Kim for MS, J. Seong for PhD. August Invited Presentation@SPIE Quantum Communications and Quantum Imagine, San Diego, the US [online event due to COVID-19]
Joonwoo Bae 'Measurement protected quantum key distribution' Lecture at ITRC Summer School [Link] [online event due to COVID-19] Joonwoo Bae 'Introduction to quantum computing and quantum information' Tutorial@Quantum Information Conference [Link] [online event due to COVID-19]
Joonwoo Bae 'Quantum communication and quantum correlations' Invited Talk@International Conference on Quantum Computing [Link] [online event due to COVID-19] Joonwoo Bae 'Entanglement Witness 2.0'July Spring Meeting in Korea Mathematics Society : special session in Quantum Information Theory [online event due to COVID-19] Jiyoung Yun 'Nonlocal Network Coding in Interference Channels' Hyeokjea Kwon 'A hybrid quantum-classical approach to mitigating measurement errors' New paper @arXiv:2006.16366 Message: Optimal measurement preserving channels for qubits ZOOM seminar : Ashutosh Rai
Publication: A hybrid quantum-classical approach to mitigating measurement errors in quantum algorithms,
IEEE Transactions on Computers [Link], Hyeokjea Kwon and Joonwoo BaeJune Invited talk@Symposium on Mathematical Physics, "Channels, Maps, and All That", Torun, Poland [cancelled due to COVID-19]May New paper @arXiv:2005.02378 Message: Quantum channel discrimination is applied to certifying two-qubit gates Erratum, IEEE JSAC Vol 38, No 5, 980 (2020) Link to Channel Coding of a Quantum Measurement, IEEE Journal on Selected Areas in Communications, Vol 38, No 3, 439 (2020) ZOOM seminar : Chee Kong Lee (Tencent America) 'Unitary coupled restricted Boltzmann machine for quantum simulations'April National Chen Kung Univ. Taiwan [cancelled due to COVID-19] Spring Meeting in Korea Mathematics Society : special session in Quantum Information Theory [postponed due to COVID-19] Publication: Channel Coding of a Quantum Measurement,
IEEE Journal on Selected Areas in Communications, Vol 38, No 3, 439 (2020) S. Kechrimparis (KAIST), C. M. Kropf (INFN, Italy), F. Wudarski (QuAIL @ NASA, the US), and J. Bae* (KAIST) *corresponding authorMarch Visitor : Hong-Bin Chen (National Chen Kung University, Taiwan) [cancelled due to COVID-19] Special Issue in Electronics: Quantum Information Theory [Link] New students : H. Lee for PhD, S. Seo for MS, S. Lee for technical MS. New paper @arXiv:2003.11867 Message: Non-locality is useful in network coding although more non-locality does not necessarily imply a higher channel capacity New paper @arXiv:2003.12314 Message: Measurement readout errors can be mitigated by a hybrid quantum-classical prescription February Publication: Mirrored Entanglement Witnesses, npj Quantum Information 6 15 (2020) [Link] with D. Chruscinski (Nicolaus Copernicus University, Torun, Poland) and B. Hiesmayr (Univ. of Vienna, Austria) Visitor : Chee Kong Lee (Tencent America, Palo Alto CA) January GEnKO approved (Freiburg-KAIST-Nagoya) 2019December Workshop @Quantum information processing in non-Markovian quantum complex systems, Nagoya, Japan [Link] Visitors : H.-D. Yuan (Chinese Univ. of Hong Kong) Talk@Particle Physics in Computing Frontier, IBS,Korea [Link] Talk@Photonics Conference 2019 [Link] Talk@Winter Camp on Particle Physics [Link] New paper @arXiv:1912.00768 Message: QKD protocols can be implemented with a fixed optimal measurement.November Visitors : D. McNulty (Aberystwyth Univ., the UK) October Conference @Quantum Techniques in Machine Learning 2019 [Link] Visitors : T. Heinosaari (Univ. Turku, Finland), D. McNulty (Aberystwyth Univ., the UK) September @DPG, Freiburg : Contributing talk "Entanglement Witness 2.0" (Mirrored Entanglement Witnesses) Visitors : J. Suzuki (Univ. of Electro-Communications, Japan) New students : J. Yun for PhD, H. Kwon for MS. Publication: Information-theoretic meaning of quantum information flow and its applications to amplitude amplification algorithms, Phys. Rev. A 100, 032303 (2019) [Link] with Sudipto Singha Roy (now in CSIC, Spain)
August Invited talk @SPIE San Diego, the US "Optimal state discrimination over quantum channels" @AQIS19, Seoul : optimal state discrimination over quantum channels (Spiros), Geometry of the quantum set on no-signaling faces (Ashutosh) @QCrypt19, Montreal : secure quantum communication by preserving an optimal measurement (Joonwoo) @ITRC summer school, KAIST KAIST-ETRI 0.5 workshop Publication: Quantifying the nonclassicality of pure dephasing, Nature Communications 10 3794 (2019) [Link] with Clemens Gneiting and Franco Nori (RIKEN, Japan), Ping-Yuan Lo (National Chiao Tung Univ., Taiwan) Hong-Bin Chen, Yueh-Nan Chen (National Chen Kung Univ., Taiwan) New paper @arXiv: 1908.10735 Message: Protection of a setting of a measurement when quantum states suffer from unwanted interactions with an environmentJuly Conference@Benasque Quantum Information 2019 [Link] Invited Talk @LPHYS, Gyeongju, Korea [Link] @ICQC2019, SeoulJune Invited Talk @COOC 2019, Korea Publication: Preserving measurements for optimal state discrimination over quantum channels, Physical Review A 99 062302 (2019) Conference@Benasque Quantum Information 2019 [Link]May Exploring Open Quantum Systems in Quantum Simulators @ KITP, Santa Barbara Visitors : D. McNulty (Aberystwyth Univ., the UK), Hui Khoon Ng (NUS-Yale, Singapore), Nilanjana Datta (Univ. of Cambridge, the UK) Conference @Mathematical Aspects of Quantum Information Theory [Link] Invited Lecture @School of Mesoscopic Physics, APCTP, Korea [Link] Regular meeting QuIST @KAISTApril KAIST-KIST 0.5 workshop Publication: More Entanglement Implies Higher Performance in Channel Discrimination Tasks, Physical Review Letters 122 140404 (2019) with Dariusz Chruscinski (Nicolaus Copernicus Univ., Torun, Poland) and Marco Piani (Univ. of Strathclyde, the UK) New Direction in Quantum Information @ Nordita, Stockholm March Finally, our lab. QIT@KAIST, here ITRC QCAI workshop Welcome on board, Ashutosh Rai! February Visit@CQT, NUS Singapore Invited Talk @KICS, Korea : Introduction to Quantum Computation and Quantum Cryptographic ProtocolsJanuary Publication: Linking entanglement detection and state tomography via quantum 2-designs, New Journal of Physics 21 013012 (2019) [Link] with Beatrix Hiesmayr (Univ. of Vienna, Austria) and Daniel McNulty (Aberystwyth Univ., the UK) Contributed Talk @KICS, Korea : Qubit State Discrimination over a Quantum Channel2018December New paper @arXiv: 1812.02087 Message: Noise in entangling gates can be detected without more of entangling resources Invited Talk @QIPA 2018, Harish Chandra Research Institute (HRI), India Visitors : Beatrix Hiesmayr (Univ. of Vienna, Austria) Revision @arXiv:1805.05111 Message: Open quantum system approach to quantum algorithm, and its information-theoretic interpretation: information flow can characterize the computational speedup of quantum algorithms Finally, moving to a new office! November New paper @arXiv: 1811.07721 Message: Optimal measurement prepared in a laboratory would be forever optimal by LOCC Visitors: Tobias Bruenner (Freiburg, Germany) and C. Kropf (INFN, Italy) New paper@arXiv:1811.09053 collaboration with NCKU, NCTU (Taiwan) and RIKEN (Tokyo) Message: Quantification of nonclassical dynamics New paper@arXiv:1811.09896 collaboration with D. Chruscinski (Torun) and B. Hiesmayr (Vienna) Message: Entanglement witnesses are much more useful : the capabilities of different entanglement witnesses can be compressed to a single one. October Visit @CUHK, Hong Kong, talking about "Quantum channels constrained by entanglement"September Conference @AQIS'18 / program committee, session chair, poster presentation New paper @arXiv:1809.06133 collaboration with P. Aniello (Napoli) and D. Chruscinski (Torun) Message: Entropic characterizations to non-Markovianity New paper @arXiv:1809.02082 collaboration with D. Chruscinski (Torun) and M. Piani (Glasgow) Message: The more entangled, the more useful in quantum channel discrimination All the best to Dr. Sudipto Singha Roy, now in UAM-CSIC (Madrid) Visitors: B. Regula (Univ. Nottingham, the UK)August Invited talk @SPIE San Diego, the US "how useful a single entanglement witness is?"July Conference@Beyond IID Cambridge, the UK, poster about "information flow in quantum algorithms" We're new at KAIST