Strong Charge Fluctuations in the Single-Electron Box: A Quantum Monte Carlo Analysis

Details Strong Charge Fluctuations in the Single-Electron Box: A Quantum Monte Carlo Analysis Strong Charge Fluctuations in the Single-Electron Box: A Quantum Monte Carlo Analysis

1998-07-08

arxiv.org/abs/cond-mat/9807112v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.59.5728

We study strong electron tunneling in the single-electron box, a small metallic island coupled to an electrode by a tunnel junction, by means of quantum Monte Carlo simulations. We obtain results, at arbitrary tunneling strength, for the free energy of this system and the average charge on the island as a function of an external bias voltage. In much of the parameter range an extrapolation to the ground state is possible. Our results for the effective charging energy for strong tunneling are compared to earlier -- in part controversial -- theoretical predictions and Monte Carlo simulations.

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