Debbie Leung
Research Interests
I study the capacity of communicating various form of data (quantum, private, or classical) through quantum channels, focusing on the superadditivity phenomenon. I also study how quantum entanglement, in particular, embezzlement of entanglement, plays a role in quantum information theory.
Positions Held
- Tolman Postdoctoral Fellow, Theoretical Physics Institute for Quantum Information, Caltech, 2002-2005
- Postdoctoral Fellow, Quantum Computation Mathematical Sciences Research Institute, Berkeley, 2002
- Postdoctoral Fellow, Information group IBM T.J. Watson Research Center, 2000-2002
Awards
- NSERC Discovery grant, Natural Sciences and Engineering Research Council of Canada, 2024
- NSERC QUORUM project, Natural Sciences and Engineering Research Council of Canada, 2023
- Discovery Grant, Natural Sciences and Engineering Research Council of Canada (NSERC), 2016-2024
Recent Publications
- Asadi, V. R., Kuroiwa, K., Leung, D., May, A., Pasterski, S., & Waddell, C. (2024). Conditional disclosure of secrets with quantum resources. arxiv:2404.14491v2
- Childs, A. M., Fu, H., Leung, D., Li, Z., Ozols, M., & Vyas, V. (2023). Streaming quantum state purification. arxiv:2309.16387v2
- Khanian, Z. B., Kuroiwa, K., & Leung, D. (2023). Rate-Distortion Theory for Mixed States. In 2023 IEEE International Symposium on Information Theory (ISIT) Vol. 00 (pp. 749-754). Institute of Electrical and Electronics Engineers (IEEE). doi:10.1109/isit54713.2023.10206960
- Leditzky, F., Leung, D., Siddhu, V., Smith, G., & Smolin, J. A. (2023). The Platypus of the Quantum Channel Zoo. IEEE Transactions on Information Theory, 69(6), 3825-3849. doi:10.1109/tit.2023.3245985
- Leditzky, F., Leung, D., Siddhu, V., Smith, G., & Smolin, J. A. (2023). Generic Nonadditivity of Quantum Capacity in Simple Channels. Physical Review Letters, 130(20), 200801. doi:10.1103/physrevlett.130.200801
- Kuroiwa, K., & Leung, D. (2023). Rate reduction of blind quantum data compression with local approximations based on the unstable structure of quantum states. Physical Review A, 107(5), 052421. doi:10.1103/physreva.107.052421
- Girard, M., Leung, D., Levick, J., Li, C. -K., Paulsen, V., Poon, Y. T., & Watrous, J. (2022). On the Mixed-Unitary Rank of Quantum Channels. Communications in Mathematical Physics, 394(2), 919-951. doi:10.1007/s00220-022-04412-y
- Khanian, Z. B., Kuroiwa, K., & Leung, D. (2022). Rate-Distortion Theory for Mixed States. doi:10.48550/arxiv.2208.11698
- Tansuwannont, T., & Leung, D. (2022). Achieving Fault Tolerance on Capped Color Codes with Few Ancillas. PRX Quantum, 3(3), 030322. doi:10.1103/prxquantum.3.030322
- Leditzky, F., Leung, D., Siddhu, V., Smith, G., & Smolin, J. A. (2022). The platypus of the quantum channel zoo. In 2022 IEEE International Symposium on Information Theory (ISIT) Vol. 00 (pp. 2433-2438). Institute of Electrical and Electronics Engineers (IEEE). doi:10.1109/isit50566.2022.9834678
- Anshu, A., Leung, D., & Touchette, D. (2022). Incompressibility of Classical Distributions. IEEE Transactions on Information Theory, 68(3), 1758-1771. doi:10.1109/tit.2021.3130131
- Tansuwannont, T., & Leung, D. (2021). Fault-tolerant quantum error correction using error weight parities. Physical Review A, 104(4), 042410. doi:10.1103/physreva.104.042410
- Leung, D., Nayak, A., Shayeghi, A., Touchette, D., Yao, P., & Yu, N. (2021). Capacity Approaching Coding for Low Noise Interactive Quantum Communication Part I: Large Alphabets. IEEE Transactions on Information Theory, 67(8), 5443-5490. doi:10.1109/tit.2021.3086221
- Leung, D., Winter, A., & Yu, N. (2021). LOCC protocols with bounded width per round optimize convex functions. Reviews in Mathematical Physics, 33(05), 2150013. doi:10.1142/s0129055x21500136
Seminars
- The platypus of the quantum channel zoo and their generic nonadditivity, 2024/10/26
- Christopher King Memorial Lecture, Beyond IID in Information Theory 12, University of Illinois Urbana-Champaign, Jul 29 -- Aug 02, 2024., 2024/07/31
- Quantum Information and Computation, Stanford Program for Inspiring the Next Generation of Women in Physics (SPINWIP), Stanford University, Palo Alto (virtual). July 8-26, 2024., 2024/07/16
- Additive quantities cannot be more than asymptotically continuous, InQubator for Quantum Simulation seminar, University of Washington, Seattle (virtual)., 2024/05/01
- The platypus of the quantum channel zoo, Quantum Information and Computing seminar, Texas Tech University, Lubbock (virtual)., 2024/04/17
- Purifying arbitrarily noisy quantum states, 2024 Center for Quantum Frontiers of Research \& Technology (QFort) Workshop, National Cheng Kung University, Tainan, Taiwan. April 15-17, 2024, 2024/04/17
- Purifying arbitrarily noisy quantum states, Fundamental Limitations to Quantum Computation, Banff International Research Station, Alberta, Canada. March 4-8, 2024., 2024/03/07
- Quantum state purification, Quantum Information Workshop, SwissMAP Research Station, Les Diablerets, Switzerland. February 26 - March 02, 2024., 2024/02/26
- The platypus of the quantum channel zoo and their generic nonadditivity, Southwest Quantum Information and Technology, 25th Annual SQuInT Workshop, University of New Mexico, Albuquerque, New Mexico. October 26-28, 2023, 2023/10/26
- Rate-Distortion Theory for Mixed States, Analytical and Combinatorial Methods in Quantum Information Theory II, International Centre for Mathematical Sciences, Edinburgh, United Kingdom, 2023/07/28
- Rate distortion theory for mixed state quantum data compression, CMS meeting, University of Ottawa, 2023/06/03
- Quantum channel capacities and the platypus of the quantum channel zoo, Quantum Days 2023, Quantum Information Theory session, 2023/01/18
- The platypus of the quantum channel zoo and their generic nonadditivity, CMS 2022 Winter Meeting, Toronto, 2022/12/04
- Quantum channel capacities, 1st International Symposium on Trans-Scale Quantum Science (TSQS2021), University of Tokyo, Japan (online), 2021/10/29