Quantum capacity of channel with thermal noise

Details Quantum capacity of channel with thermal noise Quantum capacity of channel with thermal noise

2006-02-11

arxiv.org/abs/quant-ph/0602095v3

Physics

Quantum Physics

5 pages

Scientific paper

The quantum capacity of thermal noise channel is studied. The extremal input state is obtained at the postulation that the coherent information is convex or concave at its vicinity. When the input energy tends to infinitive, it is verified by perturbation theory that the coherent information reaches its maximum at the product of identical thermal state input. The quantum capacity is obtained for lower noise channel and it is equal the one shot capacity.

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