- 必威体育下载

姓名
邮箱
手机号码
标题
留言内容
验证码

摘要

量子相干性作为量子力学一个最显著的特征, 被认为是量子信息过程中很重要的一种量子资源. 单模压缩态和双模压缩态(Einstein-Podolsky-Rosen纠缠态)均具有量子相干性, 在制备和传输过程中的量子相干性对于实际应用具有重要意义. 利用平衡零拍探测重构量子态的协方差矩阵, 本文定量分析了量子态制备过程中的不完美以及信道传输损耗对单模和双模压缩态量子相干性的影响. 实验证明量子态的压缩和纠缠特性及量子相干性对损耗均是鲁棒的. 特别地, 压缩和纠缠特性会随着量子态制备过程中热光子数的增大而减小, 直至消失, 而当压缩和纠缠均已消失时, 量子相干性依然存在. 实验结果为压缩态、纠缠态光场的量子相干性作为量子资源在量子信息过程中的应用提供了参考.

关键词:

Abstract

As one of the most remarkable features of quantum mechanics, quantum coherence is regarded as an important quantum resource in the quantum information processing. The one-mode squeezed state and the two-mode squeezed state (Einstein-Podolsky-Rosen (EPR) entangled states) as the most representative examples of nonclassical states both have quantum coherence. The squeezing property of the squeezed state is described by the variance of quadrature components, and the positive partial transposition (PPT) criterion is used to describe the entanglement of the EPR entangled states. The research of the quantum coherence of Gaussian states is also a bridge between the properties of squeezing and entanglement. It has been shown that the quantum coherence with infinite-dimensional systems can be quantified by relative entropy. One of the widely used effective methods to obtain the value of quantum coherence experimentally is the quantum tomography. The covariance matrices of the quantum states are reconstructed via balanced homodyne detection and then taken into quantum coherence expression to calculate the corresponding value. The main factors affecting quantum coherence are the classical and uncorrelated noise in the actual experimental generation processing and the decoherence effect caused by the coupling between quantum resources and the surrounding environment. And the quantum coherence evolution in the generation and transmission process of the quantum resources is essential for the practical applications. Therefore, we analyze in detail the influences of the impurity of quantum resource on squeezing, entanglement and quantum coherence. The evolutions of quantum coherence of these Gaussian states in the lossy channels are demonstrated experimentally. The quantum coherence is shown to be robust against the loss in the lossy channels, which is similar to the case of squeezing and entanglement. The quantum coherences of the squeezed states and the EPR entangled states are robust against the thermal photons in the actual experimental generation processing, although the squeezing and entanglement of Gaussian states disappear at a certain number of thermal photons. Our research results provide a reference for the practical applications of quantum coherence of the squeezed state and entangled states in the lossy environment.

Keywords:

squeezed state/
Einstein-Podolsky-Rosen entangled states/
purity of quantum state/
quantum coherence

作者及机构信息

1.
2.
3.
4.

通信作者:蔚娟,yujuan643@126.com

基金项目:国家自然科学基金(批准号: 62105256, 62122044, 61925503, 11904218, 12147215, 11834010, 62135008, 62001374, 12004276, 12103039)、陕西省教育厅自然科学研究项目(批准号: 21JK0694, 18JK0386, 21JY016)、山西省高等学校创新人才支持计划、山西省高等学校科技创新项目(批准号: 2019L0794)、山西青年三晋学者项目、山西省“1331 工程”重点学科建设计划资助的课题和陕西省自然科学基础研究项目(批准号: 2021JQ-640)资助的课题.

Authors and contacts

1.
2.
3.
4.

Corresponding author:Yu Juan,yujuan643@126.com

Funds:Project supported by the National Natural Science Foundation of China (Grant Nos. 62105256, 62122044, 61925503, 11904218, 12147215, 11834010, 62135008, 62001374, 12004276, 12103039), the Natural Science Research Program of the Education Department of Shaanxi Province, China (Grant Nos. 21JK0694, 18JK0386, 21JY016), the Program for the Innovative Talents of Higher Education Institutions of Shanxi, China, the Scientific and Technological Programs of Higher Education Institutions in Shanxi, China (Grant No. 2019L0794), the Program for Sanjin Scholars of Shanxi Province, China, the Fund for Shanxi “1331Project” Key Subjects Construction, China, and the Natural Science Basic Research Program in Shaanxi Province of China (Grant No. 2021JQ-640).

文章全文: translate this paragraph

参考文献

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]
[39]
[40]
[41]
[42]
[43]
[44]
[45]
[46]
[47]
[48]

施引文献

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]
[39]
[40]
[41]
[42]
[43]
[44]
[45]
[46]
[47]
[48]

[1]	王渝, 吴艺豪, 李易璞, 卢凯翔, 伊天成, 张云波.二维旋转谐振子势中单粒子的跳频压缩及演化. 必威体育下载 , 2024, 73(7): 074202.doi:10.7498/aps.73.20231929
[2]	赵豪, 冯晋霞, 孙婧可, 李渊骥, 张宽收.连续变量Einstein-Podolsky-Rosen纠缠态光场在光纤信道中分发时纠缠的鲁棒性. 必威体育下载 , 2022, 71(9): 094202.doi:10.7498/aps.71.20212380
[3]	董曜, 纪爱玲, 张国锋.关联退极化量子信道中qutrit-qutrit系统的量子相干性演化. 必威体育下载 , 2022, 71(7): 070303.doi:10.7498/aps.71.20212067
[4]	翟泽辉, 郝温静, 刘建丽, 段西亚.用于光学薛定谔猫态制备的滤波设计与滤波腔腔长测量. 必威体育下载 , 2020, 69(18): 184204.doi:10.7498/aps.69.20200589
[5]	田聪, 鹿翔, 张英杰, 夏云杰.纠缠相干光场对量子态最大演化速率的操控. 必威体育下载 , 2019, 68(15): 150301.doi:10.7498/aps.68.20190385
[6]	左小杰, 孙颍榕, 闫智辉, 贾晓军.高灵敏度的量子迈克耳孙干涉仪. 必威体育下载 , 2018, 67(13): 134202.doi:10.7498/aps.67.20172563
[7]	伊天成, 丁悦然, 任杰, 王艺敏, 尤文龙.具有Dzyaloshinskii-Moriya相互作用的XY模型的量子相干性. 必威体育下载 , 2018, 67(14): 140303.doi:10.7498/aps.67.20172755
[8]	叶世强, 陈小余.基于量子相干性的四体贝尔不等式构建. 必威体育下载 , 2017, 66(20): 200301.doi:10.7498/aps.66.200301
[9]	杨丽君, 马腾, 孙克家, 冯晓敏.微波场作用下三能级原子系统的无反转光放大. 必威体育下载 , 2015, 64(6): 064205.doi:10.7498/aps.64.064205
[10]	余学才, 汪平和, 张利勋.光晶格动量依赖偶极势中原子运动. 必威体育下载 , 2013, 62(14): 144202.doi:10.7498/aps.62.144202
[11]	李巍, 王永钢, 杨伯君.损耗对表面等离子体激元压缩态的影响. 必威体育下载 , 2011, 60(2): 024203.doi:10.7498/aps.60.024203
[12]	马瑞琼, 李永放, 时坚.量子态的非相干光时域测量. 必威体育下载 , 2008, 57(9): 5593-5599.doi:10.7498/aps.57.5593
[13]	张淼, 贾焕玉, 姬晓辉, 司坤, 韦联福.制备囚禁冷离子的振动压缩量子态. 必威体育下载 , 2008, 57(12): 7650-7657.doi:10.7498/aps.57.7650
[14]	胡菊菊, 蔡十华, 王建秋, 嵇英华.声子库的量子态对介观电路量子特性影响的研究. 必威体育下载 , 2008, 57(1): 496-501.doi:10.7498/aps.57.496
[15]	张婉娟, 王治国, 谢双媛, 羊亚平.频率变化的压缩态光场与原子的相互作用. 必威体育下载 , 2007, 56(4): 2168-2174.doi:10.7498/aps.56.2168
[16]	金硕, 解炳昊.外磁场中海森伯反铁磁模型的代数结构和压缩态解. 必威体育下载 , 2006, 55(8): 3880-3884.doi:10.7498/aps.55.3880
[17]	贾晓军, 苏晓龙, 潘庆, 谢常德, 彭堃墀.具有经典相干性的两组EPR纠缠态光场的实验产生. 必威体育下载 , 2005, 54(6): 2717-2722.doi:10.7498/aps.54.2717
[18]	宋同强.利用双模压缩真空态实现量子态的远程传输. 必威体育下载 , 2004, 53(10): 3358-3362.doi:10.7498/aps.53.3358
[19]	邓文基, 许运华, 刘平.测不准关系和最小不确定态. 必威体育下载 , 2003, 52(12): 2961-2964.doi:10.7498/aps.52.2961
[20]	郝三如, 王麓雅.用外加驱动场压缩有热槽相互作用二态量子系统的退相干性. 必威体育下载 , 2000, 49(4): 610-614.doi:10.7498/aps.49.610

计量

文章访问数:4028
PDF下载量:156
被引次数:0

搜索

留言板