共查询到20条相似文献,搜索用时 31 毫秒
1.
构造出了一种新的奇偶非线性相干态, 并借助于数值计算方法研究了它们的压缩、振幅平方压缩、反聚束和相位概率分布等非经典性质. 结果表明, 与通常的奇偶相干态和非线性奇偶相干态不同, 在参数|λ|的不同取值范围内, 新的奇偶非线性相干态在Y1和Y2两个方向均可呈现振幅平方压缩效应, 而压缩效应仅在偶非线性相干态的X2方向上呈现, 反聚束效应仅在奇非线性相干态中呈现. 另外, 通过研究新的奇偶非线性相干态相位概率分布, 发现新的奇偶非线性相干态具有完全不同的量子干涉特性.
关键词:
新的奇偶非线性相干态
压缩效应
反聚束
相位概率分布 相似文献
2.
Ji-Suo Wang Tang-Kun Liu Jian Feng Jin-Zuo Sun Ming-Sheng Zhan 《International Journal of Theoretical Physics》2003,42(12):2855-2862
Using the Pegg–Barnett formalism of phase operator, we obtain phase probability distributions of new even and odd nonlinear coherent states. It is shown that the distributions for the states are rather different, and unlike the case of ordinary even and odd coherent states the Pegg–Barnett distribution clearly reflects the different character of quantum interference in the case of the new even and odd coherent states. 相似文献
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A new kind of even and odd nonlinear coherent states (EONLCSs) is introduced. Using the Pegg-Barnett formalism of phase operator we study the phase probability distributions of the new kind of EONLCSs. The numerical computation results show that the phase probability distributions for the new EONLCSs can clearly exhibit the different features of quantum interference and distinct from those of the ordinary even and odd coherent states (EOCSs) and EONLCSs. Based on the phase probability distributions we investigate the phase and number squeezing of the new EONLCSs. It is found that these states exhibit number squeezing for different ranges of the parameter |λ|. 相似文献
7.
卢道明 《原子与分子物理学报》2008,25(4):875-880
利用数值计算方法,研究了有限维Hilbert空间一种新的奇偶非线性相干态的反聚束效应.研究结果表明:各有限维Hilbert空间新的偶非线性相干态均不出现反聚束效应.但各有限维Hilbert空间新的奇非线性相干态均可出现反聚束效应. 相似文献
8.
Meng Xiang-Guo Wang Ji-Suo Li Yan-Ling 《International Journal of Theoretical Physics》2007,46(5):1205-1214
In this paper, a new kind of even and odd nonlinear coherent states (NLCSs) are introduced. Some nonclassical properties of
the states are investigated. It has been found that the new even and odd NLCSs exhibit quadrature squeezing and amplitude-squared
squeezing in the Y
2 direction, however the new odd NLCSs only display sub-Poissonian behaviour. The results show that the nonclassical properties
of the new even and odd NLCSs are rather different from those of the usual even and odd coherent states and NLCSs.
PACS numbers:42.50.-p, 03.65.-w 相似文献
9.
Ji-Suo Wang Jian Feng Yun-Feng Gao Tang-Kun Liu Ming-Sheng Zhan 《International Journal of Theoretical Physics》2003,42(1):89-98
Based on Roy and Roy's work (Roy, B. and Roy, P. (2000). Journal of Optics B: Quantum Semiclass. Opt.
2, 65), a new type of even and odd nonlinear coherent states (NCSs) are defined. They result from Schrödinger cat states for deformed field. Using the numerical method, we study nonclassical properties of the new even and odd NCSs. It is shown that quantum statistical properties of the new even and odd NCSs are quite different from those of the usual even and odd coherent states (CSs). It is found that the squeezing only consists in the new even NCS, and the amplitude-squared squeezing and antibunching effect appear for both new even and odd NCSs in some ranges of ||. 相似文献
10.
构造出了有限维Hilbert空间Roy型奇偶非线性相干态, 讨论了它们的正交归一完备性和振幅平方压缩效应. 研究表明, 在此空间中Roy型奇偶非线性相干态是归一完备的, 但不具有正交性; 当复参数相位角θ满足一定条件时它们存在振幅平方压缩效应, 同时导出了压缩条件与参数s,r以及函数f(n)之间的关系. 最后借助于数值计算, 发现对于5维(或7维)Hilbert空间中Roy型偶(或奇)非线性相干态, 当参数θ和Lamb-Dike参数η取某一给定值时, 在参数r变化的不同取值范围内, 它们均可以呈现振幅平方
关键词:
有限维Hilbert空间
Roy型非线性相干态
奇偶非线性相干态
振幅平方压缩 相似文献
11.
Even and odd nonlinear coherent states 总被引:4,自引:0,他引:4
S. Sivakumar 《Physics letters. A》1998,250(4-6):257-262
New types of even and odd nonlinear coherent states are defined. The squeezed vacuum and the squeezed first excited state are shown to be even and odd nonlinear coherent states, respectively. The nonclassical properties of some related states are studied. 相似文献
12.
根据Pegg-Barnett位相定义, 计算了一种新的奇偶非线性相干态的位相概率分布函数, 利用数值计算方法研究了它们的位相统计性质. 数值计算结果表明:新的奇偶非线性相干态的位相特性与通常奇偶相干态的位相特性截然不同. 相似文献
13.
M. Darwish 《International Journal of Theoretical Physics》2008,47(11):3035-3056
In this paper the even and odd nonlinear negative binomial states of the radiation field are introduced. These states interpolates
between even (odd) number states and the even (odd) nonlinear coherent states. The Glauber second-order correlation function
is calculated for these states. The squeezing phenomenon (normal and amplitude-squared squeezing), the quasi-probability distribution
function Q-function, Wigner-function and the phase properties, are also discussed. Examination of the resonance fluorescence against
the present state is given. It has been shown that the atomic inversion is sensitive to any variation in the even and odd
nonlinear negative binomial number M and the nonlinearity parameter η. 相似文献
14.
Finite-dimensional even and odd nonlinear pair coherent states and their some nonclassical properties
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In this paper a new class of finite-dimensional even and odd nonlinear pair coherent states (EONLPCSs), which can be realized via operating the superposed evolution operators D±(τ) on the state |q, 0), is constructed, then their orthonormalized property, completeness relations and some nonclassical properties are discussed. It is shown that the finite-dimensional EONLPCSs possess normalization and completeness relations. Moreover, the finite-dimensional EONLPCSs exhibit remarkably different sub-Poissonian distributions and phase probability distributions for different values of parameters q, η and ξ. 相似文献
15.
WANGXiao-Guang FUHong-Chen 《理论物理通讯》2001,35(6):729-734
We introduce new kinds of states of quantized radiation fields,which are the superpositions of megative binomial states.They exhibit remarkable nonclassical properties and reduce to Schrodinger cat states in a certain limit.The algebras involved in the even and odd negative binomial states turn out to be generally deformed oscillator algebras.It is found that the even and odd negative binomial states satisfy the same eigenvalue equation with the same eigenvalue and they can be viewed as two-photon nonlinear coherent states.Two methods of generating such the states are proposed. 相似文献
16.
奇偶相干迭加态的振幅高次方压缩 总被引:1,自引:0,他引:1
本文引入了学子消灭算符四次方算符α^4新的正交归一本征态:奇偶相干态和奇偶相干迭加态,并研究了奇偶相干迭加态的振幅高次方压缩特性。 相似文献
17.
偶奇qs相干态的非经典特性 总被引:7,自引:1,他引:6
利用数值计算方法研究了q和s畸变对双参数形变偶奇qs相干态量子统计特性的委现偶奇qs相干态与通常的偶奇相干态有着显著不同的量子统计性质,压缩效应和反聚束效应均可在一定条件下的两种双参数畸变态中出现,偶奇qs相干态和通常偶奇相干态的差异随q值偏离1越大和s的取值越小而越大。 相似文献
18.
In this paper we propose a theoretical scheme to show the possibility of
generating various families of nonlinear (f-deformed) coherent states of the
radiation field in a micromaser. We show that these states can be provided
in a lossless micromaser cavity under the weak Jaynes-Cummings interaction
with intensity–dependent coupling of large number of individually injected
two-level atoms in a coherent superposition of the upper and lower states.
In particular, we show that the so-called nonlinear squeezed vacuum and
nonlinear squeezed first excited states, as well as the even and odd
nonlinear coherent states can be generated in a two-photon micromaser. 相似文献
19.
压缩奇偶相干态的量子统计性质 总被引:8,自引:2,他引:6
用压缩算子作用在奇偶相干态上即可得到压缩奇偶相干态.本文研究了这类量子态的统计特性.结果表明,压缩奇相干态和压缩偶相干态都能处于压缩状态,它们的光子亦都可能出现反聚束的现象. 相似文献
20.
In this paper, we use the numerical method to study the influences of q and s deformations on the quantum statistical Properties of even and odd qs-coherent states. It is shown that nonclassical properties of the even and odd qs-coherent states are very different from those of the usual even and odd coherent states. It is found that squeezing and antibunching effect appear for both even and odd qs-coherent states in some range of the parameters q, s and r. The smaller the q (q < 1) and s are, the.Jarger the difference between the even and odd qs-coherent states and the usual even and odd coherent states is. 相似文献