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Electronic heat flow and thermal shot noise in quantum circuits.

Abstract：

:When assembling individual quantum components into a mesoscopic circuit, the interplay between Coulomb interaction and charge granularity breaks down the classical laws of electrical impedance composition. Here we explore experimentally the thermal consequences, and observe an additional quantum mechanism of electronic heat transport. The investigated, broadly tunable test-bed circuit is composed of a micron-scale metallic node connected to one electronic channel and a resistance. Heating up the node with Joule dissipation, we separately determine, from complementary noise measurements, both its temperature and the thermal shot noise induced by the temperature difference across the channel. The thermal shot noise predictions are thereby directly validated, and the electronic heat flow is revealed. The latter exhibits a contribution from the channel involving the electrons' partitioning together with the Coulomb interaction. Expanding heat current predictions to include the thermal shot noise, we find a quantitative agreement with experiments.

journal_name

Nat Commun

journal_title

Nature communications

authors

Sivre E,Duprez H,Anthore A,Aassime A,Parmentier FD,Cavanna A,Ouerghi A,Gennser U,Pierre F

doi

10.1038/s41467-019-13566-8

subject

Has Abstract

pub_date

2019-12-10 00:00:00

pages

5638

issue

1

issn

2041-1723

pii

10.1038/s41467-019-13566-8

journal_volume

10

pub_type

杂志文章

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