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arXiv 2001.03785quant-phhep-th
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非谐效应对相空间量子分布的影响:一种精确方法

Anharmonic effects on phase-space quantum profiles: an exact approach

Alex E. Bernardini, Caio Fernando e Silva

摘要:

鉴于其众所周知的光谱分解配置文件,修改由平方反比($1$ -暗淡的角动量样)的贡献的$1$ -暗淡的谐振子潜在工程作为一个有效的平台,用于探测经典和量子信息量词的背景下,相空间Weyl-Wigner形式主义。特别是,相空间的信息内容有关的正则系综驱动这样一个{ \em奇异振荡器}可以量化的良好建立的分析结构。考虑到,一方面,{ \em奇异振荡器}产生与未修改的谐波系统的谱分解轮廓等效的谱分解轮廓-在某种意义上,它们导致相同的热力学统计,即使对于不同的统计混合物-另一方面,更全面地审视它们的阶段空间信息内容可以捕获相关量子系综的编码信息的某些不同方面。根据有限的温度和相互作用参数值,除了识别退相干效应外,维格纳流分析在识别稳定的量子构型方面可能是有用的。出乎意料的是,我们的研究结果表明,统计(量子)力学的非谐奇异振子和普通谐振子之间的等价性也可以扩展到相空间量子纯度量词,这是解析计算和再现完全相同的量子系综统计混合配置文件,这不依赖于相互作用参数值。

英文摘要:

Given its well known spectral decomposition profile, the $1$-dim harmonic oscillator potential modified by an inverse square ($1$-dim angular momentum-like) contribution works as an efficient platform for probing classical and quantum information quantifiers in the context of the phase-space Weyl-Wigner formalism. In particular, the phase-space informational content related to the canonical ensemble driven by such a {\em singular oscillator} can be quantified in terms of well established analytical structures. Considering that, on one hand, the {\em singular oscillator} produce a spectral decomposition profile equivalent to that one of the unmodified harmonic system -- in the sense that they result into identical thermodynamic statistics, even for different statistical mixtures -- on the other hand, a more complete scrutinization of their phase-space information content can capture some different aspects of the encoded information for the related quantum ensembles. Besides the identification of decoherence effects, the Wigner flow analysis is presumedly useful in identifying stable quantum configurations, according to finite temperature and interaction parameter values. Unexpectedly, our results show that the equivalence between the statistical (quantum) mechanics of the anharmonic singular oscillator and an ordinary harmonic oscillator can also be extended to the phase-space quantum purity quantifier, which is analytically computed and reproduces exactly the same quantum ensemble statistical mixture profile, which does not depend on interaction parameter values.

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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