Nonclassicality of a photon-subtracted Gaussian field

被引：140

作者：

Kim, MS ^{[1
]}

Park, E

Knight, PL

Jeong, H

机构：

[1] Queens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland

[2] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England

[3] Univ Queensland, Dept Phys, St Lucia, Qld 4072, Australia

来源：

PHYSICAL REVIEW A | 2005年 / 71卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.71.043805

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the nonclassicality of a photon-subtracted Gaussian field, which was produced in a recent experiment, using negativity of the Wigner function and the nonexistence of well-behaved positive P function. We obtain the condition to see negativity of the Wigner function for the case including the mixed Gaussian incoming field, the threshold photodetection and the inefficient homodyne measurement. We show how similar the photon-subtracted state is to a superposition of coherent states.

引用

页数：6

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