Nonclassicality of quantum excitation of classical coherent fields in thermal environments

被引：12

作者：

Li, Shang-Bin ^{[1
]}

Liu, Justin ^{[1
]}

Zou, Xu-Bo ^{[2
]}

Gu, Guang-Can ^{[2
]}

机构：

[1] Shanghai Res Ctr Amertron Global, Shanghai 201204, Peoples R China

[2] Univ Sci & Technol China, Key Lab Quantum Informat, Hefei 230026, Peoples R China

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2008年 / 25卷 / 01期

关键词：

D O I：

10.1364/JOSAB.25.000054

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The nonclassicality of photon-added coherent fields in the thermal channel is investigated by exploring the volume of the negative part of the Wigner function that reduces with the dissipative time. The Wigner functions become positive when the decay time exceeds a threshold value. For the case of the single photon-added coherent state, we derive the exact threshold values of decay time in the thermal channel. For arbitrary partial negative Wigner distribution function, a generic analytical relation between the mean photon number of heat bath and the threshold value of decay time is presented. Finally, the possible application of single photon-added coherent states in quantum computation has been briefly discussed. (c) 2007 Optical Society of America.

引用

页码：54 / 59

页数：6

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