William Matthews

I am a research associate at the Statistical Laboratory of the University of Cambridge working with the Centre for Quantum Information and Foundations.

Research Interests

I am interested in quantum information theory. Recently I have been investigating the extent to which entanglement shared between a sender and receiver can assist in classical channel coding tasks, in particular zero-error coding. Another interest is in better understanding physical operations which can be performed on distributed systems by local operations and classical communication.

Selected Publications

"On the power of PPT-preserving and non-signalling codes",
Debbie Leung and W. M.,

"Finite blocklength converse bounds for quantum channels",
W. M. and Stephanie Wehner,
arXiv:1210.4722, to appear in IEEE Transactions on Information Theory.

"A linear program for the finite block length converse of Polyanskiy-Poor-Verdú via non-signalling codes",
arXiv:1109.5417, Information Theory, IEEE Transactions on, vol. 58, pp. 7036-7044, (2012).

"Entanglement-Enhanced Classical Communication over a Noisy Classical Channel"
(experimental work with the Quantum Optics and Quantum Information group at IQC),
R. Prevedel, Y. Lu, W. M., R. Kaltenbaek, K. J. Resch,
arXiv:1010.2566, Phys. Rev. Lett. 106, 110505, (2011).

"Entanglement can increase asymptotic rates of zero-error classical communication over classical channels",
Debbie Leung, Laura Mancinska, W.M., Maris Ozols, Aidan Roy,
arXiv:1009.1195, Commun. Math. Phys. 311, 97-111, (2012).

"Entanglement in channel discrimination with restricted measurements",
W.M., Marco Piani, John Watrous,
arXiv:1004.0888, Phys. Rev. A 82, 032302, (2010).

"Zero-error channel capacity and simulation assisted by non-local correlations",
Toby S. Cubitt, Debbie Leung, W.M., Andreas Winter,
arXiv:1003.3195, Information Theory, IEEE Transactions on, vol.57, no.8, pp.5509-5523, (2011) .

"Improving zero-error classical communication with entanglement",
Toby S. Cubitt, Debbie Leung, W.M., Andreas Winter,
arXiv:0911.5300, Phys. Rev. Lett. 104, 230503, (2010).

"Distinguishability of Quantum States Under Restricted Families of Measurements with an Application to Quantum Data Hiding",
W.M., Stephanie Wehner and Andreas Winter,
arXiv:0810.2327, Commun. Math. Phys. 291 813-43, (2009).

A complete list can be found on the arXiv.

Contact details