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arXiv 2403.13552cond-mat.supr-concond-mat.mes-hall
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耗散环境中约瑟夫森结的热输运

Thermal transport across a Josephson junction in a dissipative environment

Tsuyoshi Yamamoto, Leonid I. Glazman, Manuel Houzet

AI总结:

本文研究耗散环境中约瑟夫森结的热输运,确定了热导温度依赖呈现Schmid转变普适标度的条件,并讨论了热整流条件,为实验识别该转变提供指导。

摘要:

在零温度下,与欧姆环境耦合的约瑟夫森结会表现出超导相与绝缘相之间的量子相变,这取决于环境的电阻是低于还是高于电阻量子。在有限温度下,这种所谓的Schmid转变变为交叉行为。我们确定了热导的温度依赖性(该热导表征热量通过约瑟夫森结从热电阻流向冷电阻)在何种条件下展现出Schmid转变的普适标度特征。我们还讨论了电路中发生热整流的条件。我们的工作可为在热输运实验中识别Schmid转变的特征提供指导。

英文摘要:

At zero temperature, a Josephson junction coupled to an ohmic environment displays a quantum phase transition between superconducting and insulating phases, depending whether the resistance of the environment is below or above the resistance quantum. At finite temperature, this so-called Schmid transition turns into a crossover. We determine the conditions under which the temperature dependence of the thermal conductance, which characterizes heat flow from a hot to cold resistor across the Josephson junction, displays universal scaling characteristic of the Schmid transition. We also discuss conditions for heat rectification to happen in the circuit. Our work can serve as a guide for identifying signatures of the Schmid transition in heat transport experiments.

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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