关于量子酉信道的HSW容量的一个注记

摘要

给出了量子酉信道的Holevo-Schumacher-Westermoreland(HSW)信道容量的一个较简单的计算公式,并且证明利用输入的纯态可以算出这个信道的信道容量.%The Holevo-Schumacher-Westermoreland (HSW) channel capacity for the qudit unital channels was considered. A simpler formula for computing HSW channel capacity was given. And the HSW channel capacity can be determined by using only pure states. This result simplifies the computation of HSW channel capacity for the qudit unital channel.