共查询到18条相似文献,搜索用时 66 毫秒
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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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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
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叠加激发相干态的量子特性 总被引:4,自引:0,他引:4
构造了2个强度相同位相不同的激发相干态的叠加态,并通过数值计算研究了该叠加态的反聚束效应和振幅平方压缩效应随激发光子数m、光场强度x和相位差θ的变化,结果表明:随激发光子数m和光场强度x增大,该量子态的振幅平方压缩均会加深;压缩效应与相位差θ有密切的关系;随光场强度x的增大和激发光子数m的增大,其反聚束效应减弱. 相似文献
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本文详细计算一般的混合迭加态中△a1和△a2的k阶矩,应用Bloch矢量方法详细讨论混合迭加态中的高阶压缩,描写并定量计算,各阶压缩的压缩区域及压缩条件,讨论最佳压缩的条件,指出在高阶压缩的迭加态中,两个正交的分量a1和a2在某些条件可望同时被压缩,最后,试图对迭加态压缩的本质作一些探讨。
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Two new types of quantum states are constructed by applying the operator s(ξ) = exp(ξ*ab - ξa b ) on the two-mode even and odd coherent states.The mathematical and quantum statistical properties of such states are investigated.Various nonclassical features of these states,such as squeezing properties,the inter-mode photon bunching,and the violation of Cauchy-Schwarz inequality,are discussed.The Wigner function in these states are studied in detail. 相似文献
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Yu-Wan Gu Guo-Dong Shi Yu-Qiang Sun Shuai Wang 《International Journal of Theoretical Physics》2014,53(5):1784-1796
We investigate how the photon addition operation affects the nonclassical properties of the non-Gaussian squeezed state generated by adding photons to each mode of the two-mode squeezed coherent state (TMSCS). By the generating function of two-variable Hermite polynomials, the compact expression of normalization factor is derived. We show that the fields in such states exhibit remarkable sub-Poissonian photon statistics. The photon addition operation can enhance the cross-correlation for appropriate combinations of several parameters involved in the TMSCS. Compared with that of TMSCS, the Wigner function of the photon–added TMSCS (PA-TMSCS) is modulated by a factor which is also related with two-variable Hermite polynomials. Such Wigner functions have some negativity regions and show a strong quantum mechanical interference. In addition, the normalization factor, Mandel’s Q parameter, cross-correlation function and Wigner functions are all sensitive to the compound phase involved in TMSCS. 相似文献
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Zhen Wang Heng-Mei Li Hong-Chun Yuan Zhi-Long Wan Xiang-Guo Meng 《International Journal of Theoretical Physics》2017,56(3):729-740
The nonclassical and non-Gaussian quantum states—photon-added two-mode squeezed coherent states have been theoretically introduced by adding multiple photons to each mode of the two-mode squeezed coherent states. Starting from the new expression of two-mode squeezing operator in entangled states representation, the normalization factor is obtained, which is directly related to bivariate Hermite polynomials. The sub-Poissonian photon statistics, cross-correlation between two modes, partial negative Wigner function are observed, which fully reflect the nonclassicality of the target states. The negative Wigner function often display non-Gaussian distribution meanwhile. The investigations may provide experimentalists with some better references in quantum engineering. 相似文献
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PING Yun-Xia CHENG Ze ZHANG Bo CHENG Zheng-Ze 《理论物理通讯》2008,49(4):1013-1016
Entanglement properties of two-mode squeezed coherent states in
the radiation field are investigated according to the entanglement
criterion [Phys. Rev. Lett. 84 (2000) 2722]. The dependence of
entanglement on squeeze angle and squeeze parameter is discussed.
It shows that the system evolves into entangled states and entanglement does not increase persistently with the increase of squeeze angle and squeeze parameter. There only exists a certain
squeeze angle in which the entanglement exists continuously. 相似文献
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WANGJi-Suo LIUTang-Kun FENGJian SUNJin-Zuo 《理论物理通讯》2004,42(3):419-424
In our preceding work, a class of k-quantum nonlinear coherent states, i.e., the k eigenstates of the powers B^^k (k≥3) of the annihilation operator B^ =a^ 1/f(N^) of f-oscillators, are introduced. In this paper, we introduce a new kind of higher-order squeezing and an antibunching effect. The quantum statistical properties of the k states are studied. The result shows that the M-th order [M=(n 1/2)k; n=0, 1,...] squeezing effects exist in all of the k states when k is even. There is the antibunching effect in all of the k states. 相似文献
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In our preceding work, a class of k-quantum nonlinear coherent states, i.e., the k eigenstates of the powersBk (k ≥ 3) of the annihilation operator B=-a1/f(N) of f-oscillators, are introduced. In this paper, we introduce a newkind of higher-order squeezing and an antibunching effect. The quantum statistical properties of the k states are studied.The result shows that the M-th order [M = (n 1/2)k; n = 0, 1,...] squeezing effects exist in all of the k states when kis even. There is the antibunching effect in all of the k states. 相似文献
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P. K. Das 《International Journal of Theoretical Physics》2002,41(6):1099-1106
In this paper we study coherent states and squeezed states in one mode interacting Fock space. 相似文献
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Pandey Ravi Kamal Prakash Ranjana Prakash Hari 《International Journal of Theoretical Physics》2019,58(10):3342-3351
Controlled quantum teleportation of superposed coherent states using GHZ entangled 3-mode coherent states is studied. Proposed scheme can be implemented experimentally using linear optical components such as a symmetric lossless beam splitter, two phase-shifters and two photon counters. Fidelity is found close to unity for appreciable mean number of photons in coherent states and is 0.99 for mean photon number equal to two.
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