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June 10, 2025
Novel scheme to tune the cavity decay rate: arXiv:2506.07800
May 2, 2025
Our group has been awarded three presentation awards in the 2025 Spring Meeting of The Korean Physical Society.
Dowon Lee ``Observation of exceptional point in an atom-cavity system " (oral)
Yongha Shin ``Ground state cooling of 64 calcium ion string with electromagnetically-induced-transparency " (oral)
Hyegoo Lee ``Pulse shaping for selective mode control and entanglement operation in trapped-ion quantum computer " (poster)
April 28, 2025
Dinner with the groups of Prof. Dong-Yeop Na and Prof. Suyong Chae. We start a joint quantum project from the Institute for Information and communication Technology Planning & evaluation.
December 24, 2024
First tweezed Rb atom for coupling to an optical cavity!
November 20, 2024
Our group has been awarded three presentation awards in the 2024 Fall Meeting of The Korean Physical Society.
Myunghun Kim ``Order-disorder transition of trapped ions" (poster)
Hyegoo Lee ``Ground-state cooling of trapped calcium ions" (oral)
Donggeon Kim ``Three-dimensional optical lattice in an atom-cavity system" (poster)
October 30, 2024
Our group has been awarded `Healthy Laboratory 2024' from POSTECH. Three years in a row!
September 3, 2024
Our PhD student Myunghun Kim has received a presentation award in the Quantum Technology session of the 31st Korean Conference on Semiconductors. He talked about a nonlinear motion of the trapped ions.
July 5, 2024
We also have ions in a linear trap!
July 4, 2024
Our cryogenic trap is working! Calcium ions near 4 kelvin!
July 4, 2024
Our PhD student Keumhyun Kim has received a presentation award in the 2024 spring meeting of Korean Physical Society. He talked about a random number generation with trapped ions.
July 4, 2024
Our PhD student Junhee Cho has received a poster presentation award in the 31st Korean Conference on Semiconductors. He presented our experiments with a cryogenic ion trap.
May 30, 2024
First Rb atom in Node B! We now have two working atom-cavity experiments.
May 22, 2024
We thank Dr. Su-Yong Lee from Agency for Defense Development for visiting our group.
April 11, 2024
We thank Dr. Kwangil Bae from Korea Institute of Science and Technology Information for visiting our group.
April 7, 2024
Quantum financing with trapped ions or superconducting circuits: J. Heo and M. Lee, arXiv:2404.04911 (2024)
April 2, 2024
We are grateful to Dr. Junghee Ryu from Korea Institute of Science and Technology Information for visiting our group.
March 6, 2024
An efficient method for loading single atoms to an optical cavity: D. Lee et al., arXiv:2403.03068 (2024)
February 29, 2024
We have trapped 50 calcium ions in our 3D trap.
November 14, 2023
Ingrid Zimmermann from the Ion Storage Group at NIST visited us and gave an inspiring talk. Interesting cryogenic system!
November 3, 2023
Andrew Cleland from University of Chicago visited our group during the POSTECH SIGNATURE CONFERENCE.
November 2, 2023
Immanuel Bloch from Max Planck Institute of Quantum Optics visited our group during the POSTECH SIGNATURE CONFERENCE.
October 16, 2023
Please see our work `Third-order exceptional point in an ion-cavity system' at the Cover of Applied Physics Letters.
September 22, 2023
Our group has been awarded `Healthy Laboratory 2023' from POSTECH. Two years in a row!
September 15, 2023
Breakdown of a topological protection, here: Goudarzi and Lee, arXiv:2309.07710 (2023)
July 10-12 2023, Danyang
July 10-12 2023, Danyang
Group retreat and conference with other ion-trap groups in Korea
Photo taken here
June 16, 2023
Our PhD student Dowon Lee has received `Presentation Award' in the Korean Physical Society spring meeting 2023. He demonstrated the reconstruction of single-atom trajectories in an optical cavity.
April 13, 2023
Our exceptional-point paper is available here: J. Kim*, T. Ha* et al., arXiv:2304.05886 (2023).
November 29, 2022
Our master student Keumhyun Kim has received `Presentation Award' in the Korean Physical Society fall meeting 2022. He demonstrated a stable trapping of 8 ytterbium ions in a 3D trap.
November 9, 2022
Our group has been awarded `Healthy Laboratory 2022' from POSTECH.
September 7, 2022
Moonjoo Lee has been awarded Institute of Physics (IOP) Trusted Reviewer Status.
August 1, 2022
Trapping an ytterbium ion in our 3D trap
July 15, 2022
Our blade fabrication manuscript is available here: M. Kim*, K. Kim* et al., arXiv:2207.06878 (2022).
July 4 and 5, 2022
July 4 and 5, 2022
Group retreat in Gyeongju
May 29, 2022
Dipole trap of single Rb atoms with intracavity field
February 16, 2022
Our blade simulation manuscript is available at arXiv: J. Hong et al., arXiv:2202.07465 (2022).
December 14, 2021
We have some Yb-174 ions in the segmented-blade trap; first loading on November 14, 2021
September 2, 2021
We are grateful to Stephen Biegun, the 20th United States Deputy Secretary of State, for visiting our laboratory in the Engineering Research Center (director: Prof. Jae-Yoon Sim) at POSTECH.
August 6, 2021
Our laser lock paper is available at arXiv: J. Kim, D. Lee, K. Kim et al., arXiv:2108.02411 (2021)
August 5, 2021
August 5, 2021
We started pumping our 2nd ion-trap vacuum chamber.
July 12, 2021
It seems that a single Rb atom is coupled to our cavity.
April 5, 2021
We receive the new research grant `An ion-cavity interface for quantum computing and networks' from Samsung Science & Technology Foundation. We will carry out many interesting experiments with calcium ions and optical cavities!
Please find more information here.
March 31, 2021
We participate the new research project `Development of quantum computer having high fidelity quantum connectivity and fast entanglement on multi-qubit system' of Prof. Taeyoung Choi at Ewha Womans University.
March 11, 2021
Our Rb MOT, 6 mm above cavity
March 9, 2021
March 9, 2021
We started a test pumping of our ion-trap vacuum chamber. Most of the components had been pre-baked, and passivated at 450 degrees Celsius.
February 12, 2021
Our cavity characterization paper is available at arXiv: Dowon Lee et al., arXiv:2102.05853 (2021)
January 9, 2021
Our lab is getting more and more crowded..
January 7, 2021
Dilution refrigerator has arrived at the ERC center.
July 17, 2020
We have more equipment in the laboratory.
June 24, 2020
Optical tables were delivered to POSTECH QCQN. We installed five optical tables in the laboratory.
June 9, 2020
Our lab construction has been completed. Quantum experiments are starting now!
June 8, 2020
We receive the new research grant `Experimental studies in optical cavity quantum electrodynamics' from National Research Foundation.
May 28, 2020
We participate the new research project `Implementation of quantum computing hardware system based on a surface ion trap and benchmarking' of Prof. Taehyun Kim at Seoul National University.
April 24, 2020
The lab construction of `Scalable Quantum Computer Technology Platform Center' has started today. Many thanks to Prof. Jae-Yoon Sim and Prof. Ho-Jin Song!
April 3, 2020
We had an online open lab event through a video conference. We would like to thank all the participants!
April 1, 2020
Our research group gets started!
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