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arXiv 1511.02447math-phmath.FAmath.MP
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关于量子力学的经典极限I

On the classical limit of quantum mechanics I

Bruce K. Driver, Pun Wai Tong

摘要:

本文致力于研究量子力学的经典极限。更详细地说,我们将详细介绍赫普在1974年介绍的一种方法,用于研究普朗克常数($\hbar)$)趋于零时量子期望的渐近行为。我们的目标是允许无界的观测值是(非交换)的位置和动量算子的多项式函数。这是在对比赫普的原始文件中的观测值,粗略地说,需要有界函数的位置和动量运营商。正如预期的那样,量子期望的首阶贡献来自于沿着经典轨迹计算观测量,而下一阶贡献是通过将$\hbar=1$观测量通过由量子力学哈密顿量的二阶部分确定的线性正则变换来计算的。

英文摘要:

This paper is devoted to the study of the classical limit of quantum mechanics. In more detail we will elaborate on a method introduced by Hepp in 1974 for studying the asymptotic behavior of quantum expectations in the limit as Plank's constant ($\hbar)$ tends to zero. Our goal is to allow for unbounded observables which are (non-commutative) polynomial functions of the position and momentum operators. This is in contrast to Hepp's original paper where the observables were, roughly speaking, required to be bounded functions of the position and momentum operators. As expected the leading order contributions of the quantum expectations come from evaluating the observables along the classical trajectories while the next order contributions are computed by evolving the $\hbar=1$ observables by a linear canonical transformations which is determined by the second order pieces of the quantum mechanical Hamiltonian.

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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