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O'Reilly Platform
book
量子计算机编程:从入门到实践
by
Eric R. Johnston
,
Nicholas Harrigan
,
Mercedes Gimeno-Segovia
July 2021
Beginner to intermediate
274 pages
7h 10m
Chinese
Posts & Telecom Press
Content preview from
量子计算机编程:从入门到实践
30
|
第
2
章
//
如果选择的操作匹配,但值不一样,就说明通信被监听
既然量子比特已经被接收,
Alice
和
Bob
就可以公开地比较他们是否一致选择了应用
HAD
(或选择不应用
HAD
)。如果他们碰巧都应用了
HAD
(概率约为
50%
),那么二者的值应该
一致;也就是说,
Bob
能正确解码
Alice
的消息。在正确解码的消息中,如果值不一致,
就可以得出结论:有人监听了他们的消息,并将不正确的量子比特发送给了
Bob
。
2.7
小结
本章介绍了一种描述单个量子比特的方法,以及用于操作单个量子比特的各种
QPU
指令。
READ
指令的随机性被用来构建量子随机数生成器。通过控制量子比特的相对相位,可以实
现基本的量子密码。
后文将大量使用圆形表示法来可视化量子比特的状态。第
3
章将扩展圆形表示法,以表示
多量子比特系统,并介绍用于处理这种系统的
QPU
指令。
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Publisher Resources
ISBN: 9787115566355