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arXiv 1502.06099quant-ph
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在经典环境中嵌入具有非守恒概率的量子系统

Embedding quantum systems with a non-conserved probability in classical environments

Alessandro Sergi

摘要:

具有非守恒几率的量子系统可以用非厄米哈密顿量和非么正动力学来描述。本文讨论了自由度可划分为轻质量和重质量两个子集的情况。为了将子系统的非幺正动力学嵌入经典环境中,在重坐标上取了一个经典极限。这样一个经典的环境,反过来,作为一个额外的耗散源(或噪音),超出了非幺正演化所代表的。为了说明形式主义,考虑了自旋独立耦合到谐振子的海森堡双自旋链的非厄米动力学。

英文摘要:

Quantum systems with a non-conserved probability can be described by means of non-Hermitian Hamiltonians and non-unitary dynamics. In this paper, the case in which the degrees of freedom can be partitioned in two subsets with light and heavy masses is treated. A classical limit over the heavy coordinates is taken in order to embed the non-unitary dynamics of the subsystem in a classical environment. Such a classical environment, in turn, acts as an additional source of dissipation (or noise), beyond that represented by the non-unitary evolution. The non-Hermitian dynamics of a Heisenberg two-spin chain, with the spins independently coupled to harmonic oscillators, is considered in order to illustrate the formalism.

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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