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Q: Fachverband Quantenoptik und Photonik

Q 23: Poster 2: Intersectional Session

Q 23.13: Poster

Tuesday, March 15, 2011, 18:00–21:00, P1

Entanglement-Enhanced Classical Communication over a Noisy Classical Channel — •Robert Prevedel, Yang Lu, Will Matthews, Rainer Kaltenbaek, and Kevin Resch — Institute for Quantum Computing, University of Waterloo, Waterloo, N2L 3G1, ON, Canada

We present and experimentally demonstrate a communication protocol that employs shared entanglement to reduce errors when sending a bit over a particular noisy classical channel. Specifically, it is shown that, given a single use of this channel, one can transmit a bit with higher success probability when sender and receiver share entanglement compared to the best possible strategy when they do not. The experiment is realized using polarization-entangled photon pairs, whose quantum correlations play a critical role in both the encoding and decoding of the classical message. Experimentally, we find that a bit can be successfully transmitted with probability 0.891±0.002, which is close to the theoretical maximum of (2+2^−1/2)/3≈0.902 and is significantly above the optimal classical strategy, which yields 5/6≈0.833.