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
26 papers · 2 filters
Phase diagram of quantized vortices in a trapped Bose-Einstein condensed gas
S. Stringari
We investigate the thermodynamic stability of quantized vortices in a dilute Bose gas confined by a rotating harmonic trap at finite temperature. Interatomic forces play a crucial…
Local Density of States in Superconductor-Ferromagnetic Hybrid Systems
Rosario Fazio, Carlo Lucheroni
In this Letter we discuss various properties of the local density of states (DOS) for a superconductor-ferromagnet hybrid system. The DOS is modified at small energies on both side…
Quantum degeneracy and interaction effects in spin-polarized Fermi-Bose mixtures
L. Vichi, M. Inguscio, S. Stringari +1
Various features of spin-polarized Fermi gases confined in harmonic traps are discussed, taking into account possible perspectives of experimental measurements. The mechanism of th…
Zero Temperature Phases of the Electron Gas
G. Ortiz, M. Harris, P. Ballone
The stability of different phases of the three-dimensional non-relativistic electron gas is analyzed using stochastic methods. With decreasing density, we observe a {\it continuous…
An exact representation of the fermion dynamics in terms of Poisson processes and its connection with Monte Carlo algorithms
Matteo Beccaria, Carlo Presilla, Gian Fabrizio De Angelis +1
We present a simple derivation of a Feynman-Kac type formula to study fermionic systems. In this approach the real time or the imaginary time dynamics is expressed in terms of the…
Wetting of Argon on CO2
Giampaolo Mistura, Francesco Ancilotto, Lorenzo Bruschi +1
We have studied the wetting transition of Ar adsorbed on solid CO2 by means of high-precision adsorption isotherms measured with a quartz microbalance. We observe triple-point wett…
Oscillation Frequencies for a Bose Condensate in a Triaxial Magnetic Trap
E. Cerboneschi, R. Mannella, E. Arimondo +1
We investigate the dynamics of a Bose condensate, interacting with either repulsive or attractive forces, confined in a fully anisotropic harmonic potential. The (3+1)-dimensional…
Interacting hard-core bosons and surface preroughening
Alessandro Laio, Giuseppe Santoro, Erio Tosatti
The theory of the preroughening transition of an unreconstructed surface, and the ensuing disordered flat (DOF) phase, is formulated in terms of interacting steps. Finite terraces…
Stationary states of the Gross-Pitaevskii equation with linear counterpart
Roberto D'Agosta, Boris A. Malomed, Carlo Presilla
We study the stationary solutions of the Gross-Pitaevskii equation that reduce, in the limit of vanishing non-linearity, to the eigenfunctions of the associated Schrödinger equatio…
Reptation Quantum Monte Carlo
S. Baroni, S. Moroni
We present an elementary and self-contained account of the analogies existing between classical diffusion and the imaginary-time evolution of quantum systems. These analogies are u…
Elementary excitations in trapped Bose gases beyond mean field approximation
L. Pitaevskii, S. Stringari
Using hydrodynamic theory of superfluids and the Lee-Huang-Yang equation of state for interacting Bose gases we derive the first correction to the collective frequencies of a trapp…
Cantori and dynamical localization in the Bunimovich Stadium
Fausto Borgonovi, Paolo Conti, Daniela Rebuzzi +2
Classical and quantum properties of the Bunimovich stadium in the diffusive regime are reviewed. In particular, the quantum properties are directly investigated using an approximat…
Temperature dependent surface relaxations of Ag(111)
Jianjun Xie, Stefano de Gironcoli, Stefano Baroni +1
The temperature dependent surface relaxation of Ag(111) is calculated by density-functional theory. At a given temperature, the equilibrium geometry is determined by minimizing the…
Quantum Poincaré Recurrences
Giulio Casati, Giulio Maspero, Dima L. Shepelyansky
We show that quantum effects modify the decay rate of Poincaré recurrences P(t) in classical chaotic systems with hierarchical structure of phase space. The exponent p of the algeb…
Deep Level Promotion Mechanism in Sputtering
Antonio Sindona, Giovanni Falcone
We have applied a double decoupled localized level Anderson-Newns Hamiltonian to the analysis of surface effects upon the ionized fraction of sputtered atoms from…
Spinodal decomposition of a binary mixture in an uniform shear flow
F. Corberi, G. Gonnella, A. Lamura
Results are presented for the phase separation process of a binary mixture subject to an uniform shear flow quenched from a disordered to a homogeneous ordered phase. The kinetics…
Theory of Bose-Einstein condensation in trapped gases
F. Dalfovo, S. Giorgini, L. P. Pitaevskii +1
The phenomenon of Bose-Einstein condensation of dilute gases in traps is reviewed from a theoretical perspective. Mean-field theory provides a framework to understand the main feat…
Quantized vortices and collective oscillations of a trapped Bose condensed gas
Francesca Zambelli, Sandro Stringari
Using a sum rule approach we calculate the frequency shifts of the quadrupole oscillations of a harmonically trapped Bose gas due to the presence of a quantized vortex. Analytic re…
Spectral shapes of solid neon
Gaia Pedrolli, Alessandro Cuccoli, Alessandro Macchi +2
We present a Path Integral Monte Carlo calculation of the first three moments of the displacement-displacement correlation functions of solid neon at different temperatures for lon…
The Puzzling Collapse of Electronic Sliding Friction on a Superconductor Surface
B. N. J. Persson, E. Tosatti
In a recent paper [Phys. Rev. Lett. 80 (1998) 1690], Krim and coworkers have observed that the friction force, acting on a thin physisorbed layer of N_2 sliding on a lead film, abr…
Heisenberg antiferromagnet on the square lattice for S>=1
Alessandro Cuccoli, Valerio Tognetti, Paola Verrucchi +1
Theoretical predictions of a semiclassical method - the pure-quantum self-consistent harmonic approximation - for the correlation length and staggered susceptibility of the Heisenb…
Structure and stability of bosonic clouds: alkali atoms with negative scattering length
Alberto Parola, Luca Salasnich, Luciano Reatto
We investigate the form and stability of a cloud of atoms confined in a harmonic trap when the scattering length is negative. We find that, besides the known low density metastable…
Elimination of unoccupied state summations in ab-initio self-energy calculations for large supercells
Lucia Reining, Giovanni Onida, R. W. Godby
We present a new method for the computation of self-energy corrections in large supercells. It eliminates the explicit summation over unoccupied states, and uses an iterative schem…
Analytical expressions for the local-field factor G(q) and the exchange-correlation kernel K_{xc}(r) of the homogeneous electron gas
Massimiliano Corradini, Rodolfo Del Sole, Giovanni Onida +1
We present an analytical expression for the local field factor G(q) of the homogeneous electron gas which reproduces recently published Quantum Monte--Carlo data by S. Moroni, D.M.…