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arXiv 2008.01954cond-mat.mes-hallphysics.app-ph
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基于库仑耦合系统的非定域低温温度计

A non-local cryogenic thermometer based on Coulomb-coupled systems

Sagnik Banerjee, Aniket Singha

摘要:

我们研究了一个四重量子点设置,可以用来感测温度的电隔离远程目标水库。这样的设置是设想早些时候由桑切斯等。等人(New Journal of Physics,19,113040)作为非局域热力学引擎,并且依赖于库仑耦合量子点之间的静电相互作用。库仑耦合和能量过滤的共轭导致电导随远程储层温度的总体变化。温度计的性能,然后从理论上研究使用密度矩阵配方,它表明,四个量子点的设计,确保了优越的温度灵敏度和噪声鲁棒性相比,一个简单的温度计组成的两个库仑耦合量子点。最后,我们研究了该温度计的工作机制,并对温度计的最佳性能的基态配置进行了评论。本文研究的装置可以用来构建高效的非本地低温温度计。

英文摘要:

We investigate a quadruple quantum dot setup that can be employed to sense the temperature of an electrically isolated remote target reservoir. Such a setup was conceived earlier by Sánchez et. al. (New Journal of Physics, 19, 113040) as non-local thermodynamic engine and relies on the electrostatic interaction between Coulomb-coupled quantum dots. The conjugation of Coulomb-coupling and energy-filtering results in an overall change in conductance with remote reservoir temperature. The performance of the thermometer is then theoretically investigated using density matrix formulation, and it is demonstrated that the quadruple quantum dot design ensures a superior temperature sensitivity and noise robustness compared to a simple thermometer consisting of two Coulomb-coupled quantum dots. In the end, we investigate the regime of operation and comment on the ground state configuration for optimal performance of the thermometer. The setup investigated in this paper can be employed to construct highly efficient non-local cryogenic thermometers.

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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