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arXiv 2102.12988cond-mat.mes-hall
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无电流时电子散粒噪声的一般界

General bounds on electronic shot noise in the absence of currents

Jakob Eriksson, Matteo Acciai, Ludovico Tesser, Janine Splettstoesser

摘要:

本文研究了在没有相应的电荷流和热流的情况下,一般二端介观导体中的电荷和热电子噪声。尽管这些电流为零,但在系统中产生散粒噪声。我们表明,无论导体的细节和特定的非平衡条件下,电荷散粒噪声从来没有超过其热对应,从而建立一个一般的约束。在热噪声的情况下不存在这样的界限,这揭示了零电流条件下电荷和热输运之间的根本区别。

英文摘要:

We investigate the charge and heat electronic noise in a generic two-terminal mesoscopic conductor in the absence of the corresponding charge and heat currents. Despite these currents being zero, shot noise is generated in the system. We show that, irrespective of the conductor's details and the specific nonequilibrium conditions, the charge shot noise never exceeds its thermal counterpart, thus establishing a general bound. Such a bound does not exist in the case of heat noise, which reveals a fundamental difference between charge and heat transport under zero-current conditions.

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