Optimal signal detection in entanglement-assisted quantum communication systems

Author: Ban M.

Source: Journal of Optics B: Quantum and Semiclassical Optics, Volume 4, Number 2, 2002 , pp. 143-148(6)

Publisher: Institute of Physics Publishing

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Abstract:

Minimization of error probability is considered in entanglement-assisted quantum communication systems. It is shown that although quantum state signals being sent are not symmetric at a sender side, the square root measurement becomes optimum when they are made symmetric at the receiver side. For communication systems of coherent signals, where a two-mode squeezed-vacuum state is used as an entanglement resource, the quantum entanglement greatly reduces the average probability of error. The relation to the quantum dense coding of continuous variables is also discussed.

Language: English

Document Type: Miscellaneous

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