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arXiv 2212.07643quant-ph
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含时三耦合量子振子的一般动力学不变量及其幺正关系的表述

Formulation of general dynamical invariants and their unitary relations for time-dependent three coupled quantum oscillators

Jeong Ryeol Choi

摘要:

导出了三个耦合含时振子的一般动力学不变算子。虽然所得到的不变算子满足Liouville-von Neumann方程,但由于参数随时间变化的任意性,其数学公式有些复杂。明确规定了制定此不变量所需的参数条件。利用幺正变换方法,将不变算符变换为三个相互独立的简谐振子所对应的不变算符。与这样一个简化的不变量相关联的众所周知的量子解的逆变换使我们能够识别耦合的原始系统的量子解。这些解决方案是准确的,因为我们不使用近似不仅在制定的不变算子,但在酉变换以及。本文所提供的不变算符及其本征函数可以用来描述具有不同类型含时参数的系统的量子性质。

英文摘要:

A general dynamical invariant operator for three coupled time-dependent oscillators is derived. Although the obtained invariant operator satisfies the Liouville-von Neumann equation, its mathematical formula is somewhat complicated due to arbitrariness of time variations of parameters. The parametric conditions required for formulating this invariant are definitely specified. By using the unitary transformation method, the invariant operator is transformed to the one that corresponds to three independent simple harmonic oscillators. Inverse transformation of the well-known quantum solutions associated with such a simplified invariant enables us to identify quantum solutions of the coupled original systems. These solutions are exact since we do not use approximations not only in formulating the invariant operator but in the unitary transformation as well. The invariant operator and its eigenfunctions provided here can be used to characterize quantum properties of the systems with various choices of the types of time-dependent parameters.

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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