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arXiv quant-ph/0510225quant-ph
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Rabi Hamilton动力学的精确可解近似模型

Exactly solvable approximating models for Rabi Hamiltonian dynamics

Andrey Pereverzev, Eric R. Bittner

摘要:

原子与单模外驱动场的相互作用是物理学许多分支中普遍存在的问题,通常用拉比哈密顿量来描述。在本文中,我们提出了一系列的解析可解的哈密顿近似拉比哈密顿和Jaynes-Cummings模型,忽略了所谓的反旋转项拉比哈密顿比较我们的结果。通过对Jaynes-Cummings模型对角化的幺正变换,我们将逆旋转项转化为代表几个不同物理过程的独立项。通过仅保留某些项,我们可以在指定的参数范围内实现对精确动力学的良好近似。

英文摘要:

The interaction between an atom and a one mode external driving field is an ubiquitous problem in many branches of physics and is often modeled using the Rabi Hamiltonian. In this paper we present a series of analytically solvable Hamiltonians that approximate the Rabi Hamiltonian and compare our results to the Jaynes-Cummings model which neglects the so-called counter-rotating term in the Rabi Hamiltonian. Through a unitary transformation that diagonlizes the Jaynes-Cummings model, we transform the counter-rotating term into separate terms representing several different physical processes. By keeping only certain terms, we can achieve an excellent approximation to the exact dynamics within specified parameter ranges.

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