Superposition-preserving photon-number amplifier

被引：5

作者：

Bjork, G ^{[1
]}

Soderholm, J ^{[1
]}

Karlsson, A ^{[1
]}

机构：

[1] Royal Inst Technol, Dept Elect, S-16440 Kista, Sweden

来源：

PHYSICAL REVIEW A | 1998年 / 57卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.57.650

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We analyze a pure-state photon-number amplifier (PNA), i.e., a device that performs the action \psi(in)] =Sigma(lcl)\l]-->\psi(out)]=Sigma(lcl)\Gl], where G is a positive integer. We derive expressions for the fidelity of a finite internal state PNA and demonstrate that the amplifier fidelity, i.e., the similarity between the obtained and the desired output state can be made to approach unity. Finally we outline a systematic procedure to find the Hamiltonian for any finite Hilbert-space PNA and compute the Hamiltonian for a simple but nontrivial PNA. [S1050-2947(98)07301-6].

引用

页码：650 / 658

页数：9

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