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arXiv quant-ph/0307232quant-phmath-phmath.MPphysics.atom-ph
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均匀场中的衰变:一个精确可解模型

Decay in a uniform field: an exactly solvable model

R. M. Cavalcanti, P. Giacconi, R. Soldati

摘要:

本文研究了D维模型原子(D= 1,2,3)在均匀(即,静态和均匀)背景场。模型原子是一个非相对论性的点粒子,存在一个点状吸引势阱。结果表明,该模型表现出无限多的共振导致可能偏离天真的指数衰减律的非衰减(或生存)的初始原子量子态的概率。由于吸引相互作用的存在,几乎稳定的状态存在,不管它有多弱。解析估计以及数值评估的衰减率明确给出和讨论。

英文摘要:

We investigate the time evolution of the decay (or ionization) probability of a D-dimensional model atom (D=1,2,3) in the presence of a uniform (i.e., static and homogeneous) background field. The model atom consists in a non-relativistic point particle in the presence of a point-like attractive well. It is shown that the model exhibits infinitely many resonances leading to possible deviations from the naive exponential decay law of the non-decay (or survival) probability of the initial atomic quantum state. Almost stable states exist due to the presence of the attractive interaction, no matter how weak it is. Analytic estimates as well as numerical evaluation of the decay rates are explicitly given and discussed.

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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