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arXiv math-ph/0702082math-phmath.DSmath.MP
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q变形谐振子模型的Wigner函数

The Wigner function of a q-deformed harmonic oscillator model

E. I. Jafarov, S. Lievens, S. M. Nagiyev, J. Van der Jeugt

摘要:

构造了q变形量子谐振子模型的相空间表示。我们已经找到了明确的表达式的Wigner和Husimi分布函数的定态的$q$振荡器模型正在考虑中。维格纳函数表示为一个基本的超几何级数,与Al-Salam-Chihara多项式有关。它表明,在极限情况下,$h \to 0$($q \to 1$),维格纳和胡西米分布函数正确地减少到他们著名的非相对论类似物。令人惊讶的是,在q变形模型中的两个分布函数的检查表明,当$q \ll 1$时,它们在相空间中的行为类似于普通量子振荡器的基态,但具有朝向动量负值的位移。我们还计算了平均值的位置和动量使用维格纳函数。与普通情况不同,动量的平均值不是零,它取决于$q$和$n$。在q-形变模型中,激发态的分布函数具有类似基态的行为,这为进一步在相空间中对量子系统进行实验测量开辟了新的前景。

英文摘要:

The phase space representation for a q-deformed model of the quantum harmonic oscillator is constructed. We have found explicit expressions for both the Wigner and Husimi distribution functions for the stationary states of the $q$-oscillator model under consideration. The Wigner function is expressed as a basic hypergeometric series, related to the Al-Salam-Chihara polynomials. It is shown that, in the limit case $h \to 0$ ($q \to 1$), both the Wigner and Husimi distribution functions reduce correctly to their well-known non-relativistic analogues. Surprisingly, examination of both distribution functions in the q-deformed model shows that, when $q \ll 1$, their behaviour in the phase space is similar to the ground state of the ordinary quantum oscillator, but with a displacement towards negative values of the momentum. We have also computed the mean values of the position and momentum using the Wigner function. Unlike the ordinary case, the mean value of the momentum is not zero and it depends on $q$ and $n$. The ground-state like behaviour of the distribution functions for excited states in the q-deformed model opens quite new perspectives for further experimental measurements of quantum systems in the phase space.

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。

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