Coulomb-interaction effects in full counting statistics of a quantum-dot Aharonov-Bohm interferometer

Details Coulomb-interaction effects in full counting statistics of a quantum-dot Aharonov-Bohm interferometer Coulomb-interaction effects in full counting statistics of a quantum-dot Aharonov-Bohm interferometer

2008-05-23

arxiv.org/abs/0805.3697v2

Phys. Rev. B 78, 075318 (2008) (8 pages)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 3 figures

Scientific paper

10.1103/PhysRevB.78.075318

We study the effect of Coulomb interaction on the full counting statistics of an Aharonov-Bohm (AB) interferometer with a single-level quantum dot in one arm in the regime of weak dot-lead and lead-lead tunnel couplings. In the absence of Coulomb interaction, the interference processes are of nonresonant nature with an even AB flux dependence and obey bidirectional Poissonian statistics. For large charging energy, the statistic of these processes changes. In addition, processes of resonant nature with an odd flux dependence appear. In the limit of strongly asymmetric tunnel couplings from the dot to the left and right leads, their statistics is found to be strongly super-Poissonian.

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