讨论了量子计算、量子通讯与量子计算机中的核心问题: 量子叠加和量子纠缠. 从量子态表示量子信息为出发点, 指出有关量子信息的所有问题都可采用量子力学理论来处理. 其中信息的演变遵从薛定谔方程, 信息的传输就是量子态在量子通道中的传送, 信息处理就是量子态的幺正变换, 信息提取则是对量子系统实行量子测量.
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