共查询到20条相似文献,搜索用时 109 毫秒
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运用数值计算方法研究了有限维希尔伯特空间谐振子奇偶相干态的压缩特性.研究表明,有限维空间奇偶相干态展现了与通常奇偶相干态截然不同的压缩性质,奇相干态不存在二阶压缩但存在振幅平方压缩;偶相干态不仅存在压缩而且存在振幅平方压缩.通常的奇偶相干态是上述奇偶相干态的特例. 相似文献
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研究了奇偶q变形相干态中光场的高阶压缩效应.数值计算结果发现,奇偶q变形相干态中光场的高阶压缩效应与参数值q有关,当参数q取偏离1较大的值时,q变形奇偶相干态均可具有奇次方阶压缩效应却无偶次方阶压缩效应,这与通常奇偶相干态的压缩特性是不同的
关键词:
光场
q变形相干态
高阶压缩效应 相似文献
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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
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利用S.M.Barbett和D.T.Pegg提出的测量相应算符,研究了存在广义Kerr介质时,奇偶相干态中测量相位的二阶和高阶压缩性质。着重讨论了广义Kerr介质的非线性阶数m对奇偶相干态中测量相位压缩的影响。结果表明:在广义Kerr奇偶相干态中,测量相位算符存在间歇性的偶数阶CS类压缩和双偶数阶CN类压缩,压缩的深度与非线性介质的阶数m、|α}^2及δ有关。 相似文献
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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
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有限维Fock空间谐振子的奇偶相干态的高阶压缩 总被引:1,自引:0,他引:1
针对有限维Fock空间谐振子的奇偶相干态的高阶压缩特性,具体研究了在这种奇偶相干态中正交算符的任意阶压缩性质,研究结果表明,在特定条件下,正交算符在偶相干态中有2N阶压缩,且出现各阶最大压缩的条件完全相同。 相似文献
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文章给出了q变形的奇偶相干迭加态的表达式,并研究了相应的q变形奇偶相干迭加态光场的N阶压缩效应。 相似文献
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The two-mode squeezed even and odd coherent states are quantum
states with some non-classical properties. The entanglement of
two-mode squeezed even and odd coherent states are measured by
non-classicality of P-function and separability inequalities of EPR-operators. 相似文献
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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
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Using an annihilation operator, coherent states related to the electron of graphene layer placed in a magnetic field, can be obtained. In this paper, we define even and odd superposed graphene coherent states and then, we consider their entanglement, squeezing and statistical properties. To study the entanglement, we use concurrence. The results show that odd superposed graphene coherent states are maximally entangled states for all values of coherence parameter. However, the entanglement of graphene coherent states and also even superposed depend on the coherence parameter. In addition, examining the Mandel parameter shows sub-Poissonian statistics for graphene coherent states and their odd superposition; while, even superposed states do not show sub-Poissonian statistics at all. Also, we find that graphene coherent states and even superposition may be squeezed while the odd states do not show squeezing. 相似文献
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ZOU Anhua 《Chinese Journal of Lasers》1994,3(2):117-127
ThenonclassicalpropertiesofthesuperpositioninvolvingtwosqueezingcoherentstatesZOUAnhua(DepartmentofPhysics,ShengraoTeacbors'C... 相似文献
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A. Napoli A. Messina 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》1999,5(3):441-445
Some properties of the eigensolutions of two commuting non Hermitian operators are brought to the light and exploited to introduce a novel characterization of a set of non classical states of a single bosonic mode. In this context, the construction of possible generalizations of the even and odd coherent states is developed in detail. 相似文献
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Sergey A. Podoshvedov 《Optics Communications》2012,285(18):3896-3905
We propose an approach with displaced states to use it for rotations of base coherent states and squeezed coherent states. Our approach is based on representation of the coherent states in free-traveling fields in terms of displaced number states with arbitrary amplitude of displacement. Two optical schemes are developed for construction of Hadamard gate for the base states. One of the optical schemes is based on alternation of photon additions and displacement operators (in general case, N-photon additions and N?1-displacements are required) to generate displaced squeezed even/odd superposition of coherent states (SCSs) with high fidelity in dependency on type (computational zero or one) of the base input state. Another optical scheme uses two-photon subtracted squeezed coherent states to approximate outcome of the Hadamard gate for the base squeezed coherent states. Output states approximate with high fidelity either even squeezed SCS or odd SCS shifted relative to each other by some value. It enables to adjust the optical scheme for construction of the Hadamard gate being mainframe element for quantum computation with basic squeezed coherent states. 相似文献
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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