共查询到20条相似文献,搜索用时 9 毫秒
1.
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
2.
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
3.
Ji-Suo Wang Tang-Kun Liu Jian Feng Jin-Zuo Sun 《International Journal of Theoretical Physics》2004,43(9):1907-1916
A class of even and odd nonlinear coherent states are introduced. The properties of some related states, including quadrature squeezing, antibunching effect and phase probability distribution, are studied. 相似文献
4.
Ji-Suo Wang Tang-Kun Liu Jian Feng Jin-Zuo Sun 《International Journal of Theoretical Physics》2004,43(6):1469-1478
A class of even and odd nonlinear coherent states are introduced. The properties of some related states, including quadrature squeezing, antibunching effect, and phase probability distribution, are studied. 相似文献
5.
ZHANYou-Bang ZHOUPing FUHao 《理论物理通讯》2004,42(6):932-936
Dynamic evolution of a mesoscopic Josephson junction (MJJ) interacting with excited even and odd coherent states is studied. It is shown that the supercurrent in MJJ exhibits both collapse and revival (CR) phenomenon and squeezing effect. It is also shown that the CR and squeezing of supercurrent are related to degree of excitation and average photon number. 相似文献
6.
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
7.
ZHAN You-Bang ZHOU Ping FU Hao 《理论物理通讯》2004,42(12)
Dynamic evolution of a mesoscopic Josephson junction (M J J) interacting with excited even and odd coherent states is studied. It is shown that the supercurrent in MJJ exhibits both collapse and revival (CR) phenomenon and squeezing effect. It is also shown that the CR and squeezing of supercurrent are related to degree of excitation and average photon number. 相似文献
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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
11.
有限维希尔伯特空间q-畸变谐振子偶相干态及其压缩和反聚束特性 总被引:14,自引:2,他引:12
从一般形式上构造了有限维希尔伯特(Hilbert)空间q-畸变谐振子的偶相干态,并讨论了其量子统计特性。发现有限维希尔伯特空间的偶q-相干态与通常无限维空间的偶q-相干态或偶相干态有明显不同的压缩和反聚束特性。前者的偶q-相干态不仅出现正交压缩,而且出现反聚束效应。 相似文献
12.
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
13.
PropertiesofAmplitudeNth┐powerSqueezingofEvenandOddqs┐CoherentStatesWANGJisuo1)SUNChangyong1)HEJinyu2)(1)DepartmentofPhysics... 相似文献
14.
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
15.
The dynamical invariant for a general time-dependent harmonic oscillator is constructed by making use of two linearly independent solutions to the classical equation of motion. In terms of this dynamical invariant we define the time-dependent creation and annihilation operators and relevantly introduce even and odd coherent states for time dependent harmonic oscillator. The mathematical and quantum statistical properties of these states are discussed in detail. The harmonic oscillator with periodically varying frequency is treated as a demonstration of our general approach. 相似文献
16.
The dynamical invariant for a general time-dependent harmonic oscillator is constructed by making use of two linearly independent solutions to the
classical equation of motion. In terms of this dynamical invariant we define the time-dependent creation and annihilation operators and relevantly introduce even and odd coherent states
for time-dependent harmonic oscillator. The mathematical and quantum statistical properties of these states are discussed in detail. The harmonic oscillator with periodically varying frequency is treated as a
demonstration of our general approach. 相似文献
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18.
激发双参数变形奇偶相干态的压缩特性 总被引:1,自引:0,他引:1
研究了激发奇qs相干态a+mqsα〉oqs和激发偶qs相干态a+mqsα〉eqs的压缩特性,数值计算了参数m,s和q对qs压缩函数的影响.结果表明:(1)当q或s偏离1较远时,态a+mqsα〉oqs和a+mqsα〉eqs都能呈现出强烈的qs压缩,而且随着r2的增大qs压缩函数出现振幅和周期都递增的振荡现象,其振幅不但随q或s的减小而急剧增大,而且也随着m的增大而急剧增大,其周期随q或s的减小而增大但与m无关,从控制光场的压缩效应来看,场模上光子数增加数m可作为第三个独立的调节参数来使用;(2)对于大多数r,qs压缩函数对s的敏感度大于对q的敏感度,即通过调节参数s来控制光场的压缩效应要比通过调节参数q更有效. 相似文献
19.
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
20.
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