Entanglement-Enhanced Classical Communication over a Noisy Classical Channel

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 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 \pm 0.002, which is close to the theoretical maximum of (2 + 2^-1/2)/3 \simeq 0.902 and is significantly above the optimal classical strategy, which yields 5/6 \simeq 0.833.

5 pages

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• Algorithmic Aspects of Optimal Channel Coding
• Experimental achievement of the entanglement assisted capacity for the depolarizing channel
• Multiple-Access Channel Coding with Non-Signaling Correlations
• Broadcast Channel Coding: Algorithmic Aspects and Non-Signaling Assistance
• Beating the Classical Limits of Information Transmission using a Quantum Decoder
• Every entangled state provides an advantage in classical communication
• On optimal entanglement assisted one-shot classical communication
• Sudden Decoherence Transitions for Quantum Discord
• Compression of Entanglement Improves Quantum Communication
• Stronger Nonlocality in GHZ States: A Step Beyond the Conventional GHZ Paradox
• Permutation Enhances Classical Communication Assisted by Entangled States