arXivDaily arXiv每日学术速递 周一至周五更新
arXiv quant-ph/0407261quant-phmath-phmath.MP
收藏

关于广义相干态的动力学。II。经典运动方程

On the Dynamics of Generalized Coherent States. II. Classical Equations of Motions

B. A. Nikolov, D. A. Trifonov

摘要:

利用Klauder方法研究了SU(2),SU(1,1)和SU(N)群广义相干态的稳定演化,证明了同一经典解z(t)可以正确地刻画许多不同(一般不等价)系统的量子演化.作为例子,我们对一些具体的系统作了更详细的处理:得到了奇异振子、粒子在磁场中运动和有摩擦力的振子的非定常系统都具有稳定的SU(1,1)GCS,其量子演化由同一个经典函数z(t)决定。讨论了所构造的SU(1,1)GCS的物理性质,特别指出在离散级数D_k^+的情况下,它们是那些量子平均值与恒温器中振子的统计平均值相一致的状态。

英文摘要:

Using the Klauder approach the stable evolution of generalized coherent states (GCS) for some groups (SU(2), SU(1,1) and SU(N)) is considered and it is shown that one and the same classical solution z(t) can correctly characterize the quantum evolution of many different (in general nonequivalent) systems. As examples some concrete systems are treated in greater detail: it is obtained that the nonstationary systems of the singular oscillator, of the particle motion in a magnetic field, and of the oscillator with friction all have stable SU(1,1) GCS whose quantum evolution is determined by one and the same classical function z(t). The physical properties of the constructed SU(1,1) GCS are discussed and it is shown particularly that in the case of discrete series D_k^+ they are those states for which the quantum mean values coincide with the statistical ones for an oscillator in a thermostat.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑