Quantum capacity of channel with thermal noise

  title={Quantum capacity of channel with thermal noise},
  author={Xiao-yu Chen},
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… CONTINUE READING