| 增、减光子压缩真空态的维格纳函数及其非经典特性 |
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| 引用本文： | 蓝海江,侯邦品.增、减光子压缩真空态的维格纳函数及其非经典特性[J].四川师范大学学报(自然科学版),2011,34(1):80-85. |
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| 作者姓名： | 蓝海江 侯邦品 |
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| 作者单位： | 1. 柳州师范高等专科学校物理与信息科学系,广西,柳州,545003
2. 四川师范大学物理与电子工程学院,四川,成都,610066 |
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| 基金项目： | 四川省教育厅自然科学重点基金(10ZA001)资助项目 |
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| 摘 要： | 利用Fock态表象下的维格纳(Wigner)函数表示式,重构增、减光子压缩真空态的维格纳函数;依据维格纳函数在相空间中的分布规律,讨论这些量子态的非经典特性.数值结果表明:增、减光子压缩真空态的维格纳函数均出现负值,它们都是具有非经典特性的量子态;这些量子态的维格纳函数与增、减光子数k的取值有关,k取奇数时函数的负性明显大于k取偶数时的状况.此结果为这些量子态的测量提供理论依据.
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| 关 键 词： | 量子光学 增、减光子压缩真空态 维格纳函数 非经典特性 |
Wigner Functions of Photon-added and-subtracted Squeezed Vacuum States and Their Non-classical Properties |
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| LAN Hai-jiang,HOU Bang-pin.Wigner Functions of Photon-added and-subtracted Squeezed Vacuum States and Their Non-classical Properties[J].Journal of Sichuan Normal University(Natural Science),2011,34(1):80-85. |
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| Authors: | LAN Hai-jiang HOU Bang-pin |
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| Institution: | LAN Hai-jiang1,HOU Bang-pin2(1.Department of Physics and Information Science,Liuzhou Teachers College,Liuzhou 545003,Guangxi,2.College of Physics and Electronic Engineering,Sichuan Normal University,Chengdu 610066,Sichuan) |
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| Abstract: | Based on the expressions of Wigner functions in Fock-spaces,we reconstruct the Wigner functions of photon-added and-subtracted states of squeezed vacuum states.Negativities of these Wigner functions numerically indicate that these states are really non-classical quantum states.We also discuss how these negativities depend on the photon number k added to and subtraced from the squeezed vacuum states.The negativities are greater when k is odd numbers than those when k is even numbers.The result provides a the... |
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| Keywords: | quantum optics photon-added and-subtracted squeezed vacuum states Wigner function non-classical property |
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