10.1k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Sapienza University of RomeIT156 papers
- Scuola Internazionale Superiore di Studi AvanzatiIT146 papers
- University of InsubriaIT88 papers
- University of MilanIT85 papers
- University of TrentoIT85 papers
- Politecnico di TorinoIT78 papers
- University of FlorenceIT74 papers
- University of GenoaIT69 papers
- Centre National de la Recherche ScientifiqueFR65 papers
- The Abdus Salam International Centre for Theoretical Physics (ICTP)IT65 papers
- National Research CouncilLK58 papers
- University of SalernoIT56 papers
12 papers · 2 filters
DMRG study of the spin gap in a one dimensional Hubbard model: effect of the distant transfer and exchange coupling
Ryotaro Arita, Kazuhiko Kuroki, Hideo Aoki +1
The spin gap of a one-dimensional repulsive Hubbard model is numerically calculated with the density matrix renormalization group, with a special emphasis on the effect of a next-n…
Anomalous fluctuations of the condensate in interacting Bose gases
S. Giorgini, L. P. Pitaevskii, S. Stringari
We find that the fluctuations of the condensate in a weakly interacting Bose gas confined in a box of volume follow the law . This anomalous behaviour ari…
Damping in dilute Bose gases: a mean-field approach
S. Giorgini
Damping in a dilute Bose gas is investigated using a mean-field approximation which describes the coupled oscillations of condensate and non-condensate atoms in the collisionless r…
Landau damping in dilute Bose gases
L. P. Pitaevskii, S. Stringari
Landau damping in weakly interacting Bose gases is investigated by means of perturbation theory. Our approach points out the crucial role played by Bose-Einstein condensation and y…
Quantum interference in nanometric devices: ballistic transport across arrays of T-shaped quantum wires
G. Goldoni, F. Rossi, E. Molinari
We propose that the recently realized T-shaped semiconductor quantum wires (T-wires) could be exploited as three-terminal quantum interference devices. T-wires are formed by inters…
Collective and single particle excitations of a trapped Bose gas
F. Dalfovo, S. Giorgini, M. Guilleumas +2
The density of states of a Bose-condensed gas confined in a harmonic trap is investigated. The predictions of Bogoliubov theory are compared with the ones of Hartree-Fock theory an…
A single chain analysis of doped quasi one dimensional spin 1 compounds: paramagnetic versus spin 1/2 doping
M. Fabrizio, R. Mélin
We present a numerical study of single chain models of doped spin 1 compounds. We use low energy effective one-dimensional models for both the cases of paramagnetic and spin-1/2 do…
Relaxation process in a regime of quantum chaos
Giulio Casati, Giulio Maspero, Dima L. Shepelyansky
We show that the quantum relaxation process in a classically chaotic open dynamical system is characterized by a quantum relaxation time scale t_q. This scale is much shorter than…
Hundred photon microwave ionization of Rydberg atoms in a static electric field
Giuliano Benenti, Giulio Casati, Dima L. Shepelyansky
We present analytical and numerical results for the microwave excitation of nonhydrogenic atoms in a static electric field when up to 1000 photons are required to ionize an atom. F…
Shape-independent scaling of excitonic confinement in realistic quantum wires
F. Rossi, G. Goldoni, E. Molinari
The scaling of exciton binding energy in semiconductor quantum wires is investigated theoretically through a non-variational, fully three-dimensional approach for a wide set of rea…
Thermodynamics of a trapped Bose-condensed gas
S. Giorgini, L. P. Pitaevskii, S. Stringari
We investigate the thermodynamic behaviour of a Bose gas interacting with repulsive forces and confined in a harmonic anisotropic trap. We develop the formalism of mean field theor…
Enhanced magnetic fluctuations in doped spin-Peierls systems: a single-chain model analysis
M. Fabrizio, R. Mélin
We analyze by means of real space Renormalization Group (RG) as well as by exact diagonalizations the properties of a single-chain model of a doped spin-Peierls system, where a maj…