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arXiv 1010.5698cond-mat.mes-hall
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强库仑阻塞下单电子盒的非平衡导纳

Out-of-Equilibrium Admittance of Single Electron Box Under Strong Coulomb Blockade

Ya. I. Rodionov, I. S. Burmistrov

摘要:

本文研究了非平衡单电子箱中的导纳和能量耗散。该系统由一个小的金属岛耦合到一个巨大的水库通过单一的隧道结。岛中电子的电势由附加的栅电极控制。该能量耗散由AC栅极电压引起。考虑了强库仑阻塞的情况。我们重点讨论了电子相干性可以忽略,但由于库仑相互作用,电荷的量子涨落很强的情况。我们得到了在特定条件下的导纳。结果表明,即使处于非平衡状态,能量耗散率也可以通过电荷弛豫电阻和重整化栅电容来表示。我们建议用导纳作为测量系统中对应于集体激发的玻色子分布的工具。

英文摘要:

We study admittance and energy dissipation in an out-of-equlibrium single electron box. The system consists of a small metallic island coupled to a massive reservoir via single tunneling junction. The potential of electrons in the island is controlled by an additional gate electrode. The energy dissipation is caused by an AC gate voltage. The case of a strong Coulomb blockade is considered. We focus on the regime when electron coherence can be neglected but quantum fluctuations of charge are strong due to Coulomb interaction. We obtain the admittance under the specified conditions. It turns out that the energy dissipation rate can be expressed via charge relaxation resistance and renormalized gate capacitance even out of equilibrium. We suggest the admittance as a tool for a measurement of the bosonic distribution corresponding collective excitations in the system.

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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