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

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

2010-10-27

arxiv.org/abs/1010.5698v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

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.

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