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Issues in quantum mechanics: Chaotic Hamiltonian ratchets and commutation relations.

机译:量子力学中的问题:混沌哈密顿棘轮和换向关系。

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The first considers asymmetry-driven Hamiltonian ratchet effects in context of quantum chaos. It is shown, in the Liouville framework, that a biased net effective force can emerge in initially symmetric systems subject to a force of zero mean. This arises via an asymmetric system distortion in both classical and quantum mechanics. However, differences in time-periodicity and chaos between the two mechanics lead to differences in the evolution of the effective force in time.;The second part obtains the canonical commutation relation of quantum mechanics assuming, in addition to the standard assumptions of the quantum Hilbert space, only that position and momentum are functionally independent. This exposes the fundamental interpretation of the commutation relation as an expression of independence, and thereby establishes its analogy with the classical Poisson bracket. Operator techniques used in these arguments are discussed at length.
机译:第一个考虑了在量子混沌情况下不对称驱动的哈密顿棘轮效应。在Liouville框架中表明,在受到零均值力的初始对称系统中,可能会出现有偏差的净有效力。这是由于经典力学和量子力学中的不对称系统畸变引起的。但是,两种力学之间时间周期和混沌的差异会导致有效力在时间上的差异。第二部分,除了假设量子希尔伯特的标准假设外,还获得了量子力学的正则交换关系。空间,只有位置和动量在功能上是独立的。这暴露了换向关系作为独立性表达的基本解释,从而建立了与经典泊松括号的类比。详细讨论了这些参数中使用的运算符技术。

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