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arXiv physics/0510160physics.atom-ph
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动态Stark位移的经典和二次量子化描述的比较

Comparison of classical and second quantized description of the dynamic Stark shift

M. Haas, U. D. Jentschura, C. H. Keitel

摘要:

我们比较了在经典框架下,利用与Gell-Mann-Low-Sucher公式等价的非线性阻尼激光-原子相互作用和基于与时间无关的微扰理论,利用二次量子化的激光-原子偶极相互作用哈密顿量,对类氢能级的动态Stark位移的推导.我们的分析适用于激发氢原子或低核电荷数的类氢离子的双光子跃迁的激光。我们的比较,以证明为什么动态斯塔克位移可能被解释为一个受激辐射校正,并说明了两个推导之间的连接。最简单的推导是完全量化的方法。在大光子数的限制下,经典和二次量子化处理是等价的。

英文摘要:

We compare the derivation of the dynamic Stark shift of hydrogenic energy levels in a classical framework with an adiabatically damped laser-atom interaction, which is equivalent to the Gell-Mann-Low-Sucher formula, and a treatment based on time-independent perturbation theory, with a second-quantized laser-atom dipole interaction Hamiltonian. Our analysis applies to a laser that excites a two-photon transition in atomic hydrogen or in a hydrogenlike ion with low nuclear charge number. Our comparisons serve to demonstrate why the dynamic Stark shift may be interpreted as a stimulated radiative correction and illustrates connections between the two derivations. The simplest of the derivations is the fully quantized approach. The classical and the second-quantized treatment are shown to be equivalent in the limit of large photon numbers.

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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