Remarks on concavity of the auxiliary function appearing in quantum reliability function in classical-quantum channels

Remarks on concavity of the auxiliary function appearing in quantum reliability function in classical-quantum channels

Creators Fujii Jun Ichi

Creators Nakamoto Ritsuo

Creators Yanagi Kenjiro

This is an extension of results represented in ISIT2003. Concavity of the auxiliary function which appears in the random coding exponent as the lower bound of the quantum reliability function for general quantum states is proven for 0 /spl les/ s /spl les/ 1.

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info:doi/10.1109/ISIT.2005.1523466