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arXiv math-ph/0311046math-phmath.MP
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具有矩阵矩问题的矢量相干态

Vector coherent states with matrix moment problems

K. Thirulogasanthar, A. L. Hohoueto

摘要:

正则相干态可以写成一个复数$z$和一个正整数$ρ(m)$的幂的无穷级数。要求这些状态实现恒等式的分解通常会导致矩问题,其中矩形成实数的正序列$\{ρ(m)\}_{m=0}^\infty$。本文通过同时用$n \times n$矩阵代替正则相干态的复数$z$和矩$ρ(m)$,得到了新的矢量相干态.借助于广义矩阵阶乘讨论了相关振子代数。两个物理例子进行了讨论。在第一个例子中,我们得到了弱耦合极限下Jaynes-Cummings模型的相干态,并讨论了相干态的一些物理性质。在第二个例子中,我们得到了条件精确可解的超对称径向谐振子的相干态。

英文摘要:

Canonical coherent states can be written as infinite series in powers of a single complex number $z$ and a positive integer $ρ(m)$. The requirement that these states realize a resolution of the identity typically results in a moment problem, where the moments form the positive sequence of real numbers $\{ρ(m)\}_{m=0}^\infty$. In this paper we obtain new classes of vector coherent states by simultaneously replacing the complex number $z$ and the moments $ρ(m)$ of the canonical coherent states by $n \times n$ matrices. Associated oscillator algebras are discussed with the aid of a generalized matrix factorial. Two physical examples are discussed. In the first example coherent states are obtained for the Jaynes-Cummings model in the weak coupling limit and some physical properties are discussed in terms of the constructed coherent states. In the second example coherent states are obtained for a conditionally exactly solvable supersymmetric radial harmonic oscillator.

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