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arXiv 2602.16658math-phcond-mat.stat-mechmath.MPquant-ph
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均场玻色动力学中波动的指数集中

Exponential concentration of fluctuations in mean-field boson dynamics

Scuola Internazionale Superiore di Studi Avanzati(国际高等研究院);LMU Munich(慕尼黑大学);University of Bologna(博洛尼亚大学)

Matias Gabriel Ginzburg, Simone Rademacher, Giacomo De Palma

AI总结:

该研究证明了均场玻色动力学中,脱离凝聚态粒子数的概率随粒子数指数衰减,改进了对激发态概率的控制界限。

摘要:

我们研究了一个由N个相互作用的玻色子组成的系统,初始状态为凝聚态。对于广泛类别的均场哈密顿量,包括具有任意有界相互作用和无界相互作用势模型,我们证明了在任意有限演化时间内,有n个粒子脱离凝聚态的概率随n指数衰减。我们的结果加强了之前已知的界限,这些界限仅提供对n个激发态概率的多项式控制。

英文摘要:

We study the mean-field dynamics of a system of $N$ interacting bosons starting from an initially condensated state. For a broad class of mean-field Hamiltonians, including models with arbitrary bounded interactions and models with unbounded interaction potentials, we prove that the probability of having $n$ particles outside the condensate decays exponentially in $n$ for any finite evolution time. Our results strengthen previously known bounds that provide only polynomial control on the probability of having $n$ excitations.

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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