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arXiv 1502.07856cond-mat.mes-hallcond-mat.stat-mechquant-ph
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单电子通道热流的量子极限

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

摘要:

量子物理学预言,在单个传输通道上存在基本的最大热导率,并且这种热导率量子$G_Q$是通用的,与携带热量的粒子类型无关。这种普遍性,再加上热量和信息之间的关系,标志着信息传递的普遍限制。我们报告的量子限制的费米粒子通过一个单一的电子通道的热流的定量测量,使用噪声测温。与预测的$G_Q$的协议证明建立实验的量子热传输的基本构件。达到低于10%的精度打开了许多涉及热的量子操纵的实验。

英文摘要:

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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