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 in Theoretical Physics Institute for Quantum Information, Caltech December 2002 - August 2005
• Postdoctoral Fellow in Workshop on Quantum Computation Mathematical Sciences Research Institute, Berkeley September 2002 - December 2002
• Postdoctoral Fellow Physics of Information group IBM T.J. Watson Research Center July 2000 - August 2002

Awards

• University Research Chair, University of Waterloo, 2015 - to date
• Tier II Canada Research Chair in Quantum Communications, 2005-2015

Recent Publications

• Flag fault-tolerant error correction, measurement, and quantum computation for cyclic CSS codes, T. Tansuwannont, C. Chamberland, and D. Leung, Phys. Rev. A, 101, 012342 (2020).
• Fault-tolerant quantum error correction using error weight parities, Theerapat Tansuwannont and Debbie Leung, arXiv: 2006.03068
• On the mixed-unitary rank of quantum channels, Mark Girard and Debbie Leung and Jeremy Levick and Chi-Kwong Li and Vern Paulsen and Yiu Tung Poon and John Watrous, arXiv: 2003.14405
• Capacity Approaching Coding for Low Noise Interactive Quantum Communication Part I: Large Alphabets, Debbie Leung and Ashwin Nayak and Ala Shayeghi and Dave Touchette and Penghui Yao and Nengkun Yu, arXiv: 2001.02818
• Incompressibility of classical distributions, Anurag Anshu and Debbie Leung and Dave Touchette, arXiv: 1911.09126
• Additive entanglemement measures cannot be more than asymptotically continuous, Andrea Coladangelo and Debbie Leung, arXiv: 1910.11354

Seminars

• Incompressibility of classical distributions, University of New Mexico USA
• Incompressibility of classical distributions, University of Waterloo Canada
• Embezzlement and Applications, ICMAT Autonomous University of Madrid
• Simple proof of non-closure of quantum correlations using embezzlement, International Centre for Mathematical Sciences (ICMS) University of Edinburgh UK
• The curious capacities of quantum channels, Young Researcher Forum on Quantum Information Science National Tsing Hua University Taiwan
• Embezzlement and Applications, 19th Asian Quantum Information Science Conference (AQIS) KIAS Seoul Korea
• The curious capacities of quantum channels, University of Hong Kong