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18 papers · 1 filter
Second Order Phase Transitions : From Infinite to Finite Systems
P. Finocchiaro, M. Belkacem, T. Kubo +2
We investigate the Equation of State (EOS) of classical systems having 300 and 512 particles confined in a box with periodic boundary conditions. We show that such a system, indepe…
Renormalization group approach to anisotropic superconductors at finite temperature
Fabio Siringo, Giuseppe G. N. Angilella, Renato Pucci
A renormalization group (RG) analysis of the superconductive instability of an anisotropic fermionic system is developed at a finite temperature. The method appears a natural gener…
Are light alkali metals still metals under high pressure?
Fabio Siringo, Renato Pucci, Giuseppe G. N. Angilella
The extended Hubbard Hamiltonian on a bcc lattice is studied at half-filling and for a finite hopping between next-nearest-neighbours, in mean-field approximation. An ionic insulat…
Aharonov-Bohm oscillations and resonant tunneling in strongly correlated quantum dots
C. Bruder, Rosario Fazio, Herbert Schoeller
We investigate Aharonov-Bohm oscillations of the current through a strongly correlated quantum dot embedded in an arbitrary scattering geometry. Resonant-tunneling processes lead t…
-Expansion of the Conductivity at the Superconductor-Mott Insulator Transition
Rosario Fazio, Dario Zappala`
We study the critical behavior of the conductivity at the zero temperature superconductor-Mott insulator transition in space-time dimensions for a model of bosons with s…
DC and AC Josephson Effect in a Superconductor-Luttinger Liquid-Superconductor System
Rosario Fazio, F. W. J. Hekking, A. A. Odintsov +2
We calculate both the DC and the AC Josephson current through a one-dimensional system of interacting electrons, connected to two superconductors by tunnel junctions. We treat the…