Photon-added detection

被引：6

作者：

Branczyk, AM ^{[1
]}

Osborne, TJ

Gilchrist, A

Ralph, TC

机构：

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

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

[3] Univ Bristol, Dept Math, Bristol BS8 1TW, Avon, England

来源：

PHYSICAL REVIEW A | 2003年 / 68卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.68.043821

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The production of conditional quantum states and quantum operations based on the result of measurement is now seen as a key tool in quantum information and metrology. We propose a different type of photon number detector. It functions nondeterministically, but when successful, it has high fidelity. The detector, which makes use of an n-photon auxiliary Fock state and high efficiency homodyne detection, allows a tunable trade-off between fidelity and probability. By sacrificing probability of operation, an excellent approximation to a photon-number detector is achieved.

引用

页数：5

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