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arXiv quant-ph/9802030quant-phhep-th
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量子力学概率表示中的含时不变量和格林函数

Time-Dependent Invariants and Green's Functions in the Probability Representation of Quantum Mechanics

V. I. Man'ko, L. Rosa, P. Vitale

摘要:

在量子力学的概率表示中,量子态由经典概率分布,即边际分布函数(marginal distribution function,简称EFF)表示,其时间依赖性由经典演化方程控制。我们发现,并明确解决,广泛的一类哈密顿,新的方程的格林函数这样一个方程,所谓的经典传播。我们阐明的经典传播的量子传播的密度矩阵和格林函数的薛定谔方程的连接。在新的量子力学的描述,我们给出了一个定义的相干性仅在属性的量子力学和我们测试的新定义恢复众所周知的结果。作为应用,考虑了受迫参量振荡器。找到了它的经典传播子和量子传播子,以及相干态和Fock态的密度泛函。

英文摘要:

In the probability representation of quantum mechanics, quantum states are represented by a classical probability distribution, the marginal distribution function (MDF), whose time dependence is governed by a classical evolution equation. We find and explicitly solve, for a wide class of Hamiltonians, new equations for the Green's function of such an equation, the so-called classical propagator. We elucidate the connection of the classical propagator to the quantum propagator for the density matrix and to the Green's function of the Schrödinger equation. Within the new description of quantum mechanics we give a definition of coherence solely in terms of properties of the MDF and we test the new definition recovering well known results. As an application, the forced parametric oscillator is considered . Its classical and quantum propagator are found, together with the MDF for coherent and Fock states.

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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