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arXiv 2302.02673math-phmath.CAmath.MPquant-ph
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量子芝诺动力学的半经典极限

The semiclassical limit of a quantum Zeno dynamics

Fabio Deelan Cunden, Paolo Facchi, Marilena Ligabò

AI总结:

本研究受腔量子电动力学中量子芝诺动力学启发,在半经典极限下分析截断动量算符的符号族渐近行为,得到极限形式并给出其光滑近似,还从动力学视角探讨了该极限的意义。

摘要:

受腔量子电动力学场景中量子芝诺动力学的启发,我们在普朗克常数$\boldsymbol{\to0}$且量子数$N\to\boldsymbol{\to}$、$\boldsymbol{N}$保持固定的半经典极限下,研究了与截断动量算符对应的一族符号的渐近行为。在合适的拓扑结构中,极限为不连续符号$\boldsymbol{\to_D(x,p)}$,其中$\boldsymbol{\to_D}$是相空间中经典允许区域$D$的特征函数。精细化分析表明,该符号渐近趋近于函数$\boldsymbol{\to_D^{(N)}(x,p)}$,其中$\boldsymbol{\to_D^{(N)}}$是与积分艾里函数相关的$\boldsymbol{\to_D}$的光滑版本。我们还从动力学角度讨论了该极限。

英文摘要:

Motivated by a quantum Zeno dynamics in a cavity quantum electrodynamics setting, we study the asymptotics of a family of symbols corresponding to a truncated momentum operator, in the semiclassical limit of vanishing Planck constant $\hbar\to0$ and large quantum number $N\to\infty$, with $\hbar N$ kept fixed. In a suitable topology, the limit is the discontinuous symbol $pχ_D(x,p)$ where $χ_D$ is the characteristic function of the classically permitted region $D$ in phase space. A refined analysis shows that the symbol is asymptotically close to the function $pχ_D^{(N)}(x,p)$, where $χ_D^{(N)}$ is a smooth version of $χ_D$ related to the integrated Airy function. We also discuss the limit from a dynamical point of view.

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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