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arXiv · 1502.07856

Quantum limit of heat flow across a single electronic channel

S. Jezouin·F. D. Parmentier·A. Anthore·U. Gennser·A. Cavanna·Y. Jin·F. Pierre
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Abstract

Quantum physics predicts that there is a fundamental maximum heat conductance across a single transport channel, and that this thermal conductance quantum $G_Q$ is universal, independent of the type of particles carrying the heat. Such universality, combined with the relationship between heat and information, signals a general limit on information transfer. We report on the quantitative measurement of the quantum limited heat flow for Fermi particles across a single electronic channel, using noise thermometry. The demonstrated agreement with the predicted $G_Q$ establishes experimentally this basic building block of quantum thermal transport. The achieved accuracy of below 10\% opens access to many experiments involving the quantum manipulation of heat.

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S. Jezouin, F. D. Parmentier, A. Anthore, U. Gennser, A. Cavanna, Y. Jin, F. Pierre. 2015-02-27. Quantum limit of heat flow across a single electronic channel. https://doi.org/10.1126/science.1241912

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