Input states for quantum gates

被引：5

作者：

Gilchrist, A ^{[1
]}

Munro, WJ

White, AG

机构：

[1] Univ Queensland, Ctr Quantum Comp Technol, Brisbane, Qld 4072, Australia

[2] Univ Queensland, Dept Phys, Brisbane, Qld 4072, Australia

[3] Hewlett Packard Labs, Bristol BS34 8QZ, Avon, England

来源：

PHYSICAL REVIEW A | 2003年 / 67卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.67.040304

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We examine three possible implementations of nondeterministic linear optical controlled NOT gates with a view to an in-principle demonstration in the near future. To this end we consider demonstrating the gates using currently available sources, such as spontaneous parametric down conversion and coherent states, and current detectors only able to distinguish between zero and many photons. The demonstration is possible in the coincidence basis and the errors introduced by the nonoptimal input states and detectors are analyzed.

引用

页数：4

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