Abstract
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 the 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 , which is close to the theoretical maximum of and is significantly above the optimal classical strategy, which yields .
- Received 8 October 2010
DOI:https://doi.org/10.1103/PhysRevLett.106.110505
© 2011 American Physical Society
Viewpoint
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