共查询到17条相似文献,搜索用时 140 毫秒
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两参数变形量子代数SU(1,1)q,s的相干态及其性质 总被引:1,自引:1,他引:0
利用SU(1,1)q,s量子代数的两参数变形振子构造出归一化的SU(1,1)q,s相干态,证明了SU(1,1)q,s量子代数的表示基是正交的,并讨论了它的相干态的归一性和完备性。指出(SU(1,1)q,s相干态的相干性受参数q、s的影响。 相似文献
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本文研究了双参数变形量子代数SU(2)q,s相干态的压缩效应和反聚束效应. 相似文献
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借助一个满足量子Heisenberg-Weyl代数(H-Wq,s代数)的多模算符,给出了量子代数SU(2)q,s和SU(1,1)q,s的k(k≥2)模实现,并构造了相应的相干态. 相似文献
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本文利用量子代数 SU(1,1)q,s的 Holstein-Primakoff 实现讨论了双参数变形Jaynes-Cummings 模型,并给出了布居数反转的时间演化表达式. 相似文献
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本文构造了双参数变形光子相位算符,研究了它与双参数变形量子群SU(1,1)q,s相干态之间的关系,得到了一些新的结果. 相似文献
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双参数形变量子振子系统的Glauber相干态 总被引:2,自引:1,他引:1
本文构造了双参数形变量子振子系统的Glauber相干态|α>q,s,讨论了|α>q,s的完备性、粒子数分布、振子强度分布、最小测不准关系、相干性和Poisson统计性质。 相似文献
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本文首先讨论了Barut-GirardelloSU(1,1)相干叠加态在Bargmann指数k≠1/2时的二阶量子关联特性。发现随着Bargmann指数的增大,Barut-Girardello奇相干态呈现反关联的区域变大。然后提出并研究了PeremolovSU(1,1)相干叠加态。Peremolov奇相干态可呈现反关联,并且随着Bargmann指数的增加,反关联程度变弱,反关联区域变小。 相似文献
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两不同奇相干态组成的第种四态叠加多模叠加态光场的等阶N次方Y压缩 总被引:33,自引:18,他引:15
根据量子力学中的线性叠加原理,构造了由多模奇相干态与多模复共轭奇相干态这两种不同的奇相干态的线性叠加所组成的第Ⅰ种四态叠加多模叠加态光场|Ψo(4),I〉q,利用多模压缩态理论,研究了态|Ψo(4),I〉q的等阶N次方Y压缩特性.结果发现:1)当压缩阶数N为偶数时,在不同的条件下,态|Ψo(4),I〉q可分别呈现三种状态:a)态|Ψo(4),I〉q可处于等阶N-Y最小测不准态;b)态|Ψ(4)o,I〉q的第一正交分量可呈现等阶N次方Y压缩效应;c)态|Ψo(4),I〉q可呈现“半相干态”效应.2)当压缩阶数为奇数时,若果r1=r2=r,则在不同的条件下,态|Ψo(4),I〉q可分别呈现三种状态:a)态|Ψo(4),I〉q可处于等阶N-Y最小测不准态;b)态|Ψo(4),I〉q的第一正交分量可呈现等阶N次方Y压缩效应;c)态|Ψo(4),I〉q的第二正交分量可呈现等阶N次方Y压缩效应.3)“半相干态”是指在一定条件下,态|Ψo(4),I〉q的两个正交分量其中一个正交分量处于等阶N-Y最小测不准态,另一个正交分量既不处于等阶N-Y最小测不准态也不呈现等阶N次方Y压缩效应. 相似文献
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Abstract The Bargmann represen tations in the tensor product space of the irreducible representations for the two-parameter deformed quantum algebra SU(1,1)q,s corresponding to the negative discrete series (b) are introduced, and the corresponding Bargmann expressions for the bases of irreps, the coherent state and the operators are also derived. The Clebsch-Gordan coeficients (CGC) for the two-parameter deformed quantum algebra SU(1,1)q,s corresponding to the negative discrete series (b) are obtained. 相似文献
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The Bargmann representations in the tensor product space of the irreducible representations for the two-parameter deformed quantum algebra SU(1,1)q,s corresponding to the positive discrete series (a) are in trod uced, and the corresponding Bargmann expressions for the bases of irreps, the coherent state and the operators are also derived. The Clebsch-Gordan coefficients (CGC) for the two-parameter deformed quan tum algebra SU(1,1)q,s corresponding to the positive discrete series (a) are obtained. 相似文献
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We present a kind of new coherent states associated with the Lie superalgebra SU(2/1), and discuss their properties in detail. We also evaluate the matrix elements of the SU(2/1) generators in the coherent state representations and obtain differential realizations of the SU(2/1) algebra in the coherent state space. The differential realizations may be useful for the study of the quasi-exactly solvable problems in the quantum mechanics. 相似文献
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利用SUq(2)量子代数的q变形振子实现构造出SUq(2)的相干态。证明SUq(2)代数的表示基是正交的,并讨论了它的相干态的归一性、完闭性。指出SUq(2)相干态的相干性受q参数影响较大,它比通常的SU(2)相干态更具有一般性。
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Exact quantum states of the time-dependent quadratic Hamiltonian system are investigated using SU(1,1) Lie algebra. We realized
SU(1,1) Lie algebra by defining appropriate SU(1,1) generators and derived exact wave functions using this algebra for the
system. Raising and lowering operators of SU(1,1) Lie algebra expressed by multiplying a time-constant magnitude and a time-dependent
phase factor. Two kinds of the SU(1,1) coherent states, i.e., even and odd coherent states and Perelomov coherent states are
studied. We applied our result to the Caldirola–Kanai oscillator. The probability density of these coherent states for the
Caldirola–Kanai oscillator converged to the center as time goes by, due to the damping constant γ. All the coherent state
probability densities for the driven system are somewhat deformed.
PACS Numbers: 02.20.Sv, 03.65.-w, 03.65.Fd 相似文献