Quantum Information & AMO Physics
Welcome to Ge Quantum Theory Group
We study fundamental aspects of quantum information and their implementations via atomic, solid-state, and optical systems. We are interested in exploring fundamental limits allowed by quantum mechanics to access information (quantum sensing), transfer information (quantum communicating), and process information (quantum computing).
October 2023
Positions Available!
Undergraduates: interested in quantum information and/or AMO physics, we have appropriate projects for STEM students (research experience, summer research, capstone projects, etc.)
Graduates: interested in quantum information and/or atomic, molecular, and optical (AMO) physics
If you are interested in doing theoretical research in quantum information science, please feel free to contact wenchao.ge@uri.edu.
News
June 2024 Spencer wrote his first manuscript in our group on "Quantifying Nonclassicality of Mixed Fock States" together with Tommy. We present a numerical method of linear programming for calculating the ORT measure for mixed Fock states and extract analytical ansatze of the ORT measure for rank-3 and rank-4 states.
June 2024 Our work with Jiru and Suhail on "Classical-Nonclassical Polarity of Gaussian States" has been published in Phys. Rev. Lett.!! Our work introduces a new concept that provides a unified quantification of single-mode nonclassicality and bipartite entanglement. We showed that a conservation relation exists for the total classical-nonclassical polarity of multi-mode Gaussian states within linear optical systems.
April 2024 David, Garrett, and Simon presented their UG Capstone Projects. Best of luck to their future endeavors!
April 2024 Dr. Jing Yang (Nordita, Sweden) visited the Physics Department at URI during World Quantum Day
March 2024 Dr. Suhail Zubairy (Texas A&M University) visited the Physics Department at URI
February 2024 Quantum Journal Club is launched in the Physics Department at URI
November 2023 Congratulations to Luke for passing his Master Thesis Defense!
October 2023 Spencer, Luke, Garrett and Tommy presented at APS New England Section 2023 Fall Meeting in Kingston, RI
September 2023 Welcome Dr. Spencer Rogers to the group as a Postdoctoral Researcher and Garrett Hauser, Zoey Fiorillo, & Simon Manlove as Undergraduate Students!
August 2023 Welcome Garrett Jepson to the group as a Graduate Student!
May 2023 Congratulations to Tommy for passing the M.S. Comprehensive Exam!
May 2023 Congratulations to Luke for passing the Ph.D. qualifying exam!
May 2023 Welcome David Weber to the group! Congratulations on his Undergraduate Summer Fellowship!
March 2023 Our work in collaboration with John Bollinger's group at NIST on improving quantum simulation and quantum sensing in a trapped ion crystal is published in Phys. Rev. A. The work is also reported by URI News Rhody Today.
March 2023 Luke gave his first APS talk in Amherst College at Spring 2023 Meeting of the APS New England Section.
January 2023 Our work on the power of nonclassical states for amplifying metrology precision is published in npj Quantum Inf.
January 2023 Congratulations to Luke for passing a qualifying exam!
September 2022 Dr. Ge recieves an NSF grant on quantum sensing using nonclassical states
September 2022 Welcome Tommy to the group as a graduate student!
October 2021 Dr. Ge received an award from SIU Morris Library's inaugural Open Textbook Faculty Incentive Program
September 2021 Dr. Ge received a collaborative grant on developing an undergraduate curriculum on Quantum Information Science, Technology, Engineering, Arts, and Mathematics (QuSteam)!
September 2021 Congratulations to Terry-Ann on her internship at NASA!
August 2021 Our work on the distribution of Gaussian quantum entanglement is published in Physical Review A.
June 2021 Dr. Ge presented at the DAMOP meeting virtually of the recent results on unifying the metrological powers. We proved that phase sensing quantum advantage is equivalent to that of Force sensing.
May 2021 Our work on the first demonstration of *Quantum Amplification* of boson-mediated interactions is published in Nature Physics!
Check also the Nature Physics News about our work. https://www.nature.com/articles/s41567-021-01195-2
May 2021 Finished lecturing on Introduction to Quantum Entanglement
First (virtual) Group Meeting
Left column: Terry-Ann, Thayne, Michael
Right column: Wenchao, Luke, Kenneth
**02/26/2021**
Course teaching at SIUC
The PI of our group will be teaching a specialized course on quantum entanglement in Spring 2021. This course is offered by the Department of Physics at Southern Illinois University to teach students the basic knowledge about quantum entanglement and its applications for quantum communication, quantum computing, and quantum sensing. The level of this course is appropriate for both graduate students and advanced undergraduates with engineering or science backgrounds.
Our recent work in collaboration with Suhail Zubairy on evaluating single-mode nonclassicality has been published in Phys. Rev. A. We use an operational resource-theoretic measure of nonclassicality of a single-mode quantum state to study the abilities of different classes of states for quantum-enhanced sensing. In particular, we find a class of states that are as good as squeezed vacuum states, which are important for certain sensing tasks including the laser interferometer gravitational-wave laboratory (LIGO) experiments. **10/09/2020**
Our recent work in collaboration with experimentalists Shaun Burd, Daniel Slichter, John Bollinger, and many others is available on arXiv. We have demonstrated over 3-fold enhancements of interaction strength between trapped-ion qubits using parametric amplification of the ion's external motion. Our idea can increase entangling-gate fidelities and can potentially reduce the energies used in coupling the trapped-ion qubits and the external motion. Our method could enable exploration of new parameter regimes and enhanced quantum information processing. **09/29/2020**