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| 广义压缩粒子数态的非经典性质及其退相干 | |
| 引用本文： | 徐学翔,袁洪春,胡利云.广义压缩粒子数态的非经典性质及其退相干[J].物理学报,2010,59(7):4661-4671. |
| 作者姓名： | 徐学翔 袁洪春 胡利云 |
| 作者单位： | 1. 江西师范大学物理与通信电子学院,南昌,330022上海交通大学物理系,上海,200030 2. 上海交通大学物理系,上海,200030 3. 江西师范大学物理与通信电子学院,南昌,330022 |
| 基金项目： | 国家自然科学基金(批准号:10775097,10874174)和江西省教育厅科学技术研究计划(批准号:GJJ10097)资助的课题. |
| 摘 要： | 研究了三参数的压缩算符产生的广义压缩粒子数态的非经典性质及其在光子损失通道中的退相干问题.利用有序算符内的积分技术和Weyl编序算符在相似变换下的不变性,简洁地导出了广义压缩粒子数态的Wigner函数(Laguerre-Gaussian函数).基于Wigner函数的演化积分公式,解析地推导出了在耗散通道中的Wigner函数表达式.特别地,根据Wigner函数负部体积讨论了其非经典性. |
| 关 键 词： | 压缩效应 Q-参数 Wigner函数 非经典性质 |
| 收稿时间： | 2009-10-05 |
Nonclassicality and decoherence of generalized squeezed Fock state |
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| Xu Xue-Xiang,Yuan Hong-Chun,Hu Li-Yun.Nonclassicality and decoherence of generalized squeezed Fock state[J].Acta Physica Sinica,2010,59(7):4661-4671. | |
| Authors: | Xu Xue-Xiang Yuan Hong-Chun Hu Li-Yun |
| Institution: | College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China;Department of Physics, Shanghai Jiao Tong University, Shanghai 200030, China;College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China |
| Abstract: | We study the nonclassicality and decoherence in photon-loss channel of generalized squeezed Fock state, which is related to the squeezed operator with three real parameters. By using the Weyl ordering invariance under similarity transformations and the technique of integration within an ordered product of operators, we obtain the compact Wigner function of the generalized squeezed Fock state (Laguree-Gaussian function). According to the integration formula of the time evolution of the Wigner function, the Wigner expresssion in photon-loss channel is analytically deduced. In particular, we discussed the nonclassicality from the negativity of the Wigner function. |
| Keywords: | squeezing effect Q-parameter Wigner function nonclassicality |
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