From weak- to strong-coupling mesoscopic Fermi liquids
Department of Physics, Duke University - Box 90305, Durham, NC 27708-0305, USA
2 Condensed Matter Theory Group, LOMA, UMR 5798, Université de Bordeaux I - 33405 Talence, France, EU
3 Univ. Paris-Sud, LPTMS UMR 8626 - 91405 Orsay Cedex, France, EU
Accepted: 17 November 2011
We study mesoscopic fluctuations in a system in which there is a continuous connection between two distinct Fermi liquids, asking whether the mesoscopic variation in the two limits is correlated. The particular system studied is an Anderson impurity coupled to a finite mesoscopic reservoir described by the random matrix theory, a structure which can be realized using quantum dots. We use the slave boson mean-field approach to connect the levels of the uncoupled system to those of the strong-coupling Nozières' Fermi liquid. We find strong but not complete correlation between the mesoscopic properties in the two limits and several universal features.
PACS: 73.23.-b – Electronic transport in mesoscopic systems / 71.10.Ca – Electron gas, Fermi gas / 73.21.La – Quantum dots
© EPLA, 2012