Effect of dephasing on mesoscopic conductance fluctuations in quantum dots with single channel leads

Details Effect of dephasing on mesoscopic conductance fluctuations in quantum dots with single channel leads Effect of dephasing on mesoscopic conductance fluctuations in quantum dots with single channel leads

1997-12-15

arxiv.org/abs/cond-mat/9712160v1

Phys. Rev. B 57 (1998) 7219

Physics

Condensed Matter

11 pages in REVTeX two-column format; 6 eps figures included; submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.57.7219

We consider the distribution of conductance fluctuations in disordered quantum dots with single channel leads. Using a perturbative diagrammatic approach, valid for continuous level spectra, we describe dephasing due to processes within the dot by considering two different contributions to the level broadening, thus satisfying particle number conservation. Instead of a completely non-Gaussian distribution, which occurs for zero dephasing, we find for strong dephasing that the distribution is mainly Gaussian with non-universal variance and non-Gaussian tails.

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