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arXiv 0706.0885quant-ph
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绝热近似的有效性

Validity of the Adiabatic Approximation

R. MacKenzie, A. Morin-Duchesne, H. Paquette, J. Pinel

摘要:

我们分析了绝热近似的有效性,特别是被称为“标准准则”的这种近似的有效性的可靠性。最近,人们发现这一标准是不够的。我们将论证,只有当该判据与哈密顿量演化缓慢的直观概念一致时,它才是充分的。然而,它可能是不够的情况下,哈密尔顿变化迅速,但只有一个小的量。我们还强调绝热{ \em定理}和绝热{ \em近似}之间的区别,这是两个完全不同但密切相关的思想。

英文摘要:

We analyze the validity of the adiabatic approximation, and in particular the reliability of what has been called the "standard criterion" for validity of this approximation. Recently, this criterion has been found to be insufficient. We will argue that the criterion is sufficient only when it agrees with the intuitive notion of slowness of evolution of the Hamiltonian. However, it can be insufficient in cases where the Hamiltonian varies rapidly but only by a small amount. We also emphasize the distinction between the adiabatic {\em theorem} and the adiabatic {\em approximation}, two quite different although closely related ideas.

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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