期刊文献+
共找到140篇文章
< 1 2 7 >
每页显示 20 50 100
Amplitude-Nth-power squeezing of PB phase coherent states
1
作者 马志民 马爱群 +2 位作者 陈国恒 刘树田 冯立峰 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2004年第3期281-285,共5页
PB Phase Coherent States are very important quantum states in quantum optics. In order to investigate the amplitude-Nth-power squeezing of PB Phase Coherent States, we introduce the algebraic properties of the PB phas... PB Phase Coherent States are very important quantum states in quantum optics. In order to investigate the amplitude-Nth-power squeezing of PB Phase Coherent States, we introduce the algebraic properties of the PB phase operator and the PB Phase Coherent States which are constructed by PB phase theory. We applied amplitude-Nth-power squeezing theory to define the Amplitude-Nth-Power Squeezing of PB Phase Coherent States and investigate the characteristic of the amplitude-Nth-power squeezing of PB Phase Coherent States. We obtained surprising results, in that the results were different from the other quantum states. As for |Z〉(PB Phase Coherent State), the results show that when Z is a real number there only exists amplitude-Nth-power squeezing of component; when Z is a complex number, there exists amplitude-Nth-power squeezing of component and component; when Z is a pure imaginary number, if N is odd, then there does not exist amplitude-Nth-power squeezing of component, but there exists amplitude-Nth-power squeezing of component and if N is even, then there exists amplitude-Nth-power squeezing of component, but there does not exist amplitude-Nth-power squeezing of component. 展开更多
关键词 PB phase operator algebraic property PB phase coherent state nth-power squeezing.
下载PDF
Amplitude-squared squeezing of superposition of coherent states 被引量:1
2
作者 Muhammad Ashfaq Ahmad 任珉 +1 位作者 马爱群 刘树田 《Chinese Physics B》 SCIE EI CAS CSCD 2008年第5期1777-1783,共7页
This paper discusses the amplitude-squared squeezing for the superposition of two coherent states with their phase differences being separately π/2, 3π/2, and π1, as well as for the superposition state of two pseud... This paper discusses the amplitude-squared squeezing for the superposition of two coherent states with their phase differences being separately π/2, 3π/2, and π1, as well as for the superposition state of two pseudoclassical states. According to the analysis, it is found that the superposition state of two coherent states with their phase differences π/2 and 3π/2, and the superposition state of two pseudoclassical states both do exhibit the amplitude-squared squeezing. Also, some specific states are found to exhibit even stronger squeezing effects when relative phase of the superposition is equal to the average photon number. Amplitude-squared squeezing is dependent on the difference in phase between two coherent states. 展开更多
关键词 nonclassical states superposition of two coherent states amplitude-squared squeezing
下载PDF
Amplitude Squeezing of a Weakly Interacting Bose System with Spontaneous U(1) Symmetry Breaking
3
作者 JIAO Zhi-Yong Department of Applied Physics,China University of Petroleum(East China),Dongying 257061,ChinaYU Zhao-Xian Department of Physics,Beijing Information Science and Technology University,Beijing 100101,ChinaWANG Ji-Suo Department of Physics,Liaocheng University,Liaocheng 252059,China 《Communications in Theoretical Physics》 SCIE CAS CSCD 2007年第12期1047-1050,共4页
We study the quantum fluctuations and the amplitude squeezing of a weakly interacting Bose system withspontaneous U(1) symmetry breaking.It is found that this system can exhibit amplitude squeezing.
关键词 Bose system amplitude squeezing
下载PDF
Time evolution of a squeezed chaotic field in an amplitude damping channel when used as a generating field for a squeezed number state 被引量:4
4
作者 徐兴磊 李洪奇 范洪义 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第7期106-109,共4页
We investigate how an optical squeezed chaotic field(SCF) evolves in an amplitude dissipation channel. We have used the integration within ordered product of operators technique to derive its evolution law. We also ... We investigate how an optical squeezed chaotic field(SCF) evolves in an amplitude dissipation channel. We have used the integration within ordered product of operators technique to derive its evolution law. We also show that the density operator of SCF can be viewed as a generating field of the squeezed number state. 展开更多
关键词 squeezed chaotic field amplitude damping channel squeezed number state evolution law
下载PDF
Wigner function for squeezed negative binomial state and evolution of density operator for amplitude decay
5
作者 Heng-Yun Lv Ji-Suo Wang +3 位作者 Xiao-Yan Zhang Meng-Yan Wu Bao-Long Liang Xiang-Guo Meng 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第9期93-99,共7页
Using the thermal-entangled state representation and the operator-ordering method, we investigate Wigner function(WF) for the squeezed negative binomial state(SNBS) and the analytical evolution law of density operator... Using the thermal-entangled state representation and the operator-ordering method, we investigate Wigner function(WF) for the squeezed negative binomial state(SNBS) and the analytical evolution law of density operator in the amplitude decay channel.The results show that the analytical WF is related to the square of the module of single-variable Hermite polynomials, which leads to a new two-variable special function and its generating function, and the parameters s and γplay opposite roles in the WF distributions.Besides, after undergoing this channel, the initial pure SNBS evolves into a new mixed state related to two operator Hermite polynomials within normal ordering, and fully loses its nonclassicality and decays to vacuum at long decay time. 展开更多
关键词 squeezED NEGATIVE binomial state OPERATOR ordering Wigner function density-operator EVOLUTION amplitude DECAY
下载PDF
Dissipation of a two-mode squeezed vacuum state in the single-mode amplitude damping channel
6
作者 周南润 胡利云 范洪义 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第12期38-42,共5页
We explore how a two-mode squeezed vacuum state sechθeab tanh θ[00) evolves when it undergoes a single- mode amplitude dissipative channel with rate of decay k. We find that in this process not only the squeezing p... We explore how a two-mode squeezed vacuum state sechθeab tanh θ[00) evolves when it undergoes a single- mode amplitude dissipative channel with rate of decay k. We find that in this process not only the squeezing parameter decreases, tanhθ → e-kt tanh θ, but also the second-mode vacuum state evolves into a chaotic state exp{bbln[(1 - e-2kt) tanh2 θ]}. The outcome state is no more a pure state, but an entangled mixed state. 展开更多
关键词 amplitude dissipative channel two-mode squeezed vacuum state two-mode entangled state quantum communication
下载PDF
Single-mode quadrature-amplitude measurement for generalized two-mode squeezed states studied by virtue of the entangled state representation
7
作者 许雪芬 《Chinese Physics B》 SCIE EI CAS CSCD 2006年第1期235-241,共7页
The result of one-mode quadrature-amplitude measurement for some generalized two-mode squeezed states has been studied by virtue of the entangled state representation of the corresponding two-mode squeezing operators.... The result of one-mode quadrature-amplitude measurement for some generalized two-mode squeezed states has been studied by virtue of the entangled state representation of the corresponding two-mode squeezing operators. We find that the remaining fleld-mode simultaneously collapses to the single-mode squeezed state with more stronger squeezing. The measurement result caused by a single-mode squeezed state projector is also calculated, which indicates quantum entanglement in squeezing. 展开更多
关键词 entangled state representation quadrature-amplitude measurement two-mode squeezed states
下载PDF
The nonlinear squeezed one-photon states and their nonclassical properties
8
作者 王继锁 孟祥国 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第8期2422-2427,共6页
By virtue of the technique of integration within an ordered product (IWOP) of operators and the properties of the inverses of annihilation and creation operators of f-oscillator, this paper obtains two new types of ... By virtue of the technique of integration within an ordered product (IWOP) of operators and the properties of the inverses of annihilation and creation operators of f-oscillator, this paper obtains two new types of squeezed operators and f-analogues of squeezed one-photon states, which are quite different from ones constructed by Song and Fan (Phys. Lett. A 294 (2002) 66). Subsequently, some nonclassical properties of the states are investigated in detail. 展开更多
关键词 nonlinear squeezed one-photon state amplitude-squared squeezing sub-Poissonian behaviour phase probability distribution
下载PDF
Evolution of a two-mode squeezed vacuum for amplitude decay via continuous-variable entangled state approach 被引量:2
9
作者 Xiang-Guo Meng Ji-Suo Wang +1 位作者 Bao-Long Liang Cheng-Xuan Han 《Frontiers of physics》 SCIE CSCD 2018年第5期231-239,共9页
Extending the recent work completed by Fan et al. [Front. Phys. 9(1), 74 (2014)] to a two-mode case, we investigate how a two-mode squeezed vacuum evolves when it undergoes a two-mode amplitude dissipative channel... Extending the recent work completed by Fan et al. [Front. Phys. 9(1), 74 (2014)] to a two-mode case, we investigate how a two-mode squeezed vacuum evolves when it undergoes a two-mode amplitude dissipative channel, with the same decay rate ~, using the continuous-variable entangled state approach. Our analytical results show that the initial pure-squeezed vacuum state evolves into a definite mixed state with entanglement and squeezing, decaying over time as a result of amplitude decay. We also investigate the time evolutions of the photon number distribution, the Wigner function, and the optical tomogram in this channel. Our results indicate that the evolved photon number distribution is related to Jacobi polynomials, the Wigner function has a standard Gaussian distribution (corresponding to the vacuum) at long periods, losing its nonclassicality due to amplitude decay, and a larger squeezing leads to a longer decay time. 展开更多
关键词 two-mode squeezed vacuum amplitude decay continuous-variable entangled staterepresentation photon number distribution Wigner function optical tomogram
原文传递
级联三能级原子的偶极振幅平方压缩 被引量:7
10
作者 田永红 徐大海 彭金生 《量子电子学报》 CAS CSCD 北大核心 2001年第4期334-339,共6页
 本文在文献[4]的基础上,定义了三能级原子的偶极振幅平方算符,进而由海森伯测不准关系,提出了三能级原子的偶极振幅平方压缩.研究了与关联双模压缩真空场作用的级联三能级原子的偶极振幅平方压缩效应.通过数值计算,讨论了初...  本文在文献[4]的基础上,定义了三能级原子的偶极振幅平方算符,进而由海森伯测不准关系,提出了三能级原子的偶极振幅平方压缩.研究了与关联双模压缩真空场作用的级联三能级原子的偶极振幅平方压缩效应.通过数值计算,讨论了初始压缩光场的压缩参数、单光子失谐量以及原子—光场耦合强度对原子偶极振幅平方压缩的影响. 展开更多
关键词 关联双模压缩真空态 级联三能级原子 原子偶极振幅平方压缩 量子光学
下载PDF
Kerr偶奇相干态及其非经典性 被引量:6
11
作者 詹佑邦 朱小芹 周平 《光子学报》 EI CAS CSCD 1998年第3期215-219,共5页
本文对Ker偶奇相干态及其非经典性质进行了研究.结果表明:Kerr偶相干态可呈现周期性的二阶压缩效应,Kerr奇相干态则不存在这种压缩效应;但两者均可呈现周期性的振幅平方压缩效应,这与通常偶奇相干态的情形有所不同.
关键词 偶奇相干态 非经典性 振幅平方压缩 描态
下载PDF
第V类两态叠加多模叠加态光场的广义非线性等阶N次方Y压缩 被引量:39
12
作者 杨志勇 张书玲 +2 位作者 侯瑶 韩小卫 侯洵 《光子学报》 EI CAS CSCD 北大核心 2001年第6期641-650,共10页
本文构造了由多模真空态 |{ 0 j}〉q和多模虚相干态的相反态 |{ -i Zj}〉q 这两者的线性叠加所组成的第 V类两态叠加多模叠加态光场 |ψ( 2 )5〉q.利用多模压缩态理论 ,研究了态 |ψ( 2 )5〉q的广义非线性等阶 N次方 Y压缩特性 .结果发... 本文构造了由多模真空态 |{ 0 j}〉q和多模虚相干态的相反态 |{ -i Zj}〉q 这两者的线性叠加所组成的第 V类两态叠加多模叠加态光场 |ψ( 2 )5〉q.利用多模压缩态理论 ,研究了态 |ψ( 2 )5〉q的广义非线性等阶 N次方 Y压缩特性 .结果发现 :1 )态 |ψ( 2 )5〉q 是一种典型的多模非经典光场 ;无论压缩阶数 N取奇还是取偶 ,只要各模的初始相位φj( j=1 ,2 ,3 ,… ,… ,q)和态间的初始相位差 (θ( I)nq-θ( o)oq )等满足一定的取值条件 ,态 |ψ( 2 )5〉q 总可呈现出周期性变化的、任意奇数阶和任意偶数阶的广义非线性等阶 N次方 Y压缩效应 .2 )态 |ψ( 2 )5〉q所分别呈现的任意奇数阶和任意偶数阶的等阶 N次方 Y压缩效应 ,其压缩条件、压缩特征以及压缩程度和压缩深度等各不相同 .3 )无论压缩阶数 N取奇还是取偶 ,态 |ψ( 2 )5〉q的第一和第二这两个正交分量的等阶N次方 展开更多
关键词 两态叠加 多模非经典光场 多模振幅薛定谔猫态 等阶N次方Y压缩 光场
下载PDF
压缩相干态的振幅平方压缩 被引量:3
13
作者 夏云杰 郭光灿 《中国科学技术大学学报》 CAS CSCD 北大核心 1990年第3期361-365,共5页
研究了压缩相干态的振幅平方压缩特性,发现压缩相干态也存在这类压缩,但存在的条件与通常压缩不同,特别是压缩真空态,在通常压缩最大的方向上振幅平方压缩却不存在,反之亦然.从这个角度证明了振幅平方压缩并不与通常意义下的压缩等价.
关键词 光场压缩 压缩相干态 振幅平方压缩
下载PDF
挤压油膜阻尼器在深孔加工中的实验 被引量:4
14
作者 于天彪 江早 +1 位作者 巩亚东 王宛山 《东北大学学报(自然科学版)》 EI CAS CSCD 北大核心 2002年第6期577-580,共4页
基于挤压油膜阻尼理论 ,设计了带挤压油膜阻尼器的深孔内圆磨削刀杆 ,并在高精度内圆磨床上进行了与静压支撑刀杆的磨削性能对比实验·实验表明 ,参数设计合理的油膜阻尼刀杆较静压支撑刀杆具有更优良的磨削性能和减振效果·油... 基于挤压油膜阻尼理论 ,设计了带挤压油膜阻尼器的深孔内圆磨削刀杆 ,并在高精度内圆磨床上进行了与静压支撑刀杆的磨削性能对比实验·实验表明 ,参数设计合理的油膜阻尼刀杆较静压支撑刀杆具有更优良的磨削性能和减振效果·油膜阻尼刀杆结构简单 ,拆装方便 ,稳定性高 。 展开更多
关键词 挤压油膜阻尼器 深孔加工 阻尼减振 振幅 临界转速 数值分析 实验研究
下载PDF
含类Kerr介质的多光子J-C模型中光场振幅的N次方压缩 被引量:11
15
作者 刘堂昆 彭金生 《光子学报》 EI CAS CSCD 1997年第1期21-26,共6页
二能级原子处在为类克尔介质充满的高Q腔中,单模辐射场注入后,类克尔介质与二能级原子和单模辐射场同时耦合相互作用,本文即研究这种相互作用系统中光场振幅的N次方压缩特性.着重讨论了类Kerr介质与单模辐射场相互作用的强度X和失... 二能级原子处在为类克尔介质充满的高Q腔中,单模辐射场注入后,类克尔介质与二能级原子和单模辐射场同时耦合相互作用,本文即研究这种相互作用系统中光场振幅的N次方压缩特性.着重讨论了类Kerr介质与单模辐射场相互作用的强度X和失谐量△对振幅压缩特性的影响. 展开更多
关键词 类克尔介质 J-C模型 量子光学 光场压缩
下载PDF
一类新的光场叠加态的振幅N次方压缩特性 被引量:3
16
作者 王继锁 王传奎 《光子学报》 EI CAS CSCD 1994年第6期576-580,共5页
本文讨论了由光场真空态、双光子Fock态同n光子(n>3)Fock态叠加而构成的光场叠加态的振幅N次方压缩特性。
关键词 叠加态 振幅N次方压缩 特性 光场
下载PDF
滑动轴承转子系统挤压油膜阻尼器最佳参数的设计与实现 被引量:3
17
作者 郭增林 虞烈 朱均 《西安交通大学学报》 EI CAS CSCD 北大核心 1997年第4期93-99,共7页
尽管挤压油膜阻尼器具有明显改善转子系统振动特性的作用,合理确定挤压油膜阻尼器的设计参数却非易事,尤其是在复杂的轴承-转子系统情况下.文中介绍了一种行之有效的挤压油膜阻尼器最优设计方法——虚设振幅逆解法.利用该方法可以... 尽管挤压油膜阻尼器具有明显改善转子系统振动特性的作用,合理确定挤压油膜阻尼器的设计参数却非易事,尤其是在复杂的轴承-转子系统情况下.文中介绍了一种行之有效的挤压油膜阻尼器最优设计方法——虚设振幅逆解法.利用该方法可以首先估算系统所需的最佳支承质量、支承刚度和支承阻尼,进而可以确定满足以上参数要求的挤压油膜阻尼器的结构参数.文中针对滑动轴承支承的单质量弹性转子系统。 展开更多
关键词 挤压油膜阻尼器 最优设计 滑动轴承 转子
下载PDF
偶奇q相干态的振幅立方压缩性质 被引量:4
18
作者 于肇贤 张德兴 《光子学报》 EI CAS CSCD 1995年第3期246-248,共3页
研究结果表明,偶q相干态呈现振幅立方压缩性质;奇q相干态不呈现振幅立方压缩性质。
关键词 偶奇q相干态 振幅 压缩性质
下载PDF
态|Ψ^((3))〉_q中广义磁场的不等幂次高次振幅压缩 被引量:2
19
作者 万慧军 曹大刚 +2 位作者 白晋涛 杨志勇 胡晓云 《光子学报》 EI CAS CSCD 北大核心 2002年第9期1047-1052,共6页
利用多模压缩态理论 ,研究了一种新型的三态叠加多模叠加态光场 |Ψ(3) 〉q 中广义磁场分量 (即第一正交相位分量 )的不等幂次高次振幅压缩特性 结果表明 :态 |Ψ(3) 〉q 是一种典型的三态叠加多模非经典光场 ,其广义磁场分量在一定条... 利用多模压缩态理论 ,研究了一种新型的三态叠加多模叠加态光场 |Ψ(3) 〉q 中广义磁场分量 (即第一正交相位分量 )的不等幂次高次振幅压缩特性 结果表明 :态 |Ψ(3) 〉q 是一种典型的三态叠加多模非经典光场 ,其广义磁场分量在一定条件下可呈现出周期性变化的。 展开更多
关键词 三态叠加 多模非经典光场 广义磁场分量 不等幂次Nj次方Y压缩 高次振幅压缩 量子光学
下载PDF
原子运动和模场结构对模场量子统计性质的影响 被引量:3
20
作者 刘安玲 方卯发 《量子电子学报》 CAS CSCD 北大核心 2001年第2期140-144,共5页
研究了J-C模型中原子运动和模场结构对模场量子统计性质的影响.
关键词 原子运动 模场结构 反聚束效应 振幅平方压缩 量子光学 量子统计性质
下载PDF
上一页 1 2 7 下一页 到第
使用帮助 返回顶部