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arXiv 1707.06950quant-phcond-mat.stat-mech
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相干性在量子系统非平衡热力学中的作用

The role of coherence in the non-equilibrium thermodynamics of quantum systems

G. Francica, J. Goold, F. Plastina

摘要:

利用相干性的相对熵,我们分离出相干性对受驱动非平衡量子系统能量学的贡献。我们证明了不可逆功可以分为相干功和非相干功,这为在封闭量子系统的一般非平衡变换中量化相干功提供了一个可操作的判据.然后,我们研究这样的贡献在两个物理模型的驱动量子比特和踢转子。此外,我们还表明,相干生成连接到一个过程的非绝热性,它给出了占主导地位的贡献足够慢的转换。在能量本征基中产生的相干量相当于对角熵的变化,在这里我们证明它满足涨落定理。

英文摘要:

Exploiting the relative entropy of coherence, we isolate the coherent contribution in the energetics of a driven non-equilibrium quantum system. We prove that a division of the irreversible work can be made into a coherent and incoherent part, which provides an operational criterion for quantifying the coherent contribution in a generic non-equilibrium transformation on a closed quantum system. We then study such a contribution in two physical models of a driven qubit and kicked rotor. In addition, we also show that coherence generation is connected to the non-adiabaticity of a processes, for which it gives the dominant contribution for slow-enough transformation. The amount of generated coherence in the energy eigenbasis is equivalent to the change in diagonal entropy, and here we show that it fulfills a fluctuation theorem.

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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