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arXiv 2602.08378cond-mat.dis-nn
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准周期运动边系统的热力学模式在量子Otto循环中的研究

Thermodynamic modes of a quasiperiodic mobility-edge system in a quantum Otto cycle

Zhejiang Normal University(浙江师范大学)

Ao Zhou, Shujie Cheng, Gao Xianlong

AI总结:

研究准周期运动边系统在量子OtTO循环中的热力学模式,通过调节参数实现多种热力学功能。

摘要:

我们研究了一个具有精确运动边的准周期晶格的热力学操作,该晶格由Biddle--Das Sarma模型描述。我们使用该模型作为量子Otto循环的工作介质,并将其操作模式映射为跃迁范围参数p、初始和最终势强Vi和Vf以及两种理想化的孤立冲程协议的函数。在近绝热(态冻结)协议中,其中密度矩阵在孤立冲程期间近似不变,该循环仅支持两种模式:加热器和加速器。在绝热协议中,其中能级人口保持不变而光谱被变形,会出现两种额外的模式:热机和制冷机。我们的结果表明,运动边系统可以在单一平台上实现多种热力学功能,并通过调节p、Vi和Vf来指导模式的切换。

英文摘要:

We investigate thermodynamic operation of a quasiperiodic lattice with an exact mobility edge, described by the Biddle--Das Sarma model. We use this model as the working medium of a quantum Otto cycle and map its operating mode as a function of the hopping-range parameter $p$, the initial and final potential strengths $V_i$ and $V_f$, and two idealized protocols for the isolated strokes. In a near-adiabatic (state-frozen) protocol, where the density matrix is approximately unchanged during the isolated strokes, the cycle supports only two modes: a \emph{heater} and an \emph{accelerator}. In an adiabatic protocol, where level populations are preserved while the spectrum is deformed, two additional modes appear: a \emph{heat engine} and a \emph{refrigerator}. Our results show that mobility-edge systems can realize multiple thermodynamic functions within a single platform and provide guidance for switching between modes by tuning $p$, $V_i$, and $V_f$.

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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