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
22 papers · 2 filters
Band structure and optical anisotropy in V-shaped and T-shaped semiconductor quantum wires
G. Goldoni, F. Rossi, E. Molinari +1
We present a theoretical investigation of the electronic and optical properties of V- and T-shaped quantum wires. Valence band mixing as well as realistic sample geometries are ful…
Scaling and thermodynamics of a trapped Bose-condensed gas
S. Giorgini, L. Pitaevskii, S. Stringari
We investigate the thermodynamics of a Bose gas interacting with repulsive forces and confined in a harmonic trap. We show that the relevant parameters of the system (temperature,…
Nonlinear Dynamics of a Bose Condensed Gas
F. Dalfovo, C. Minniti, S. Stringari +1
We investigate the dynamic behavior of a Bose-condensed gas of alkali atoms interacting with repulsive forces and confined in a magnetic trap at zero temperature. Using the Thomas-…
Hydrodynamic modes in a trapped Bose gas above the Bose-Einstein transition
A. Griffin, Wen-Chin Wu, S. Stringari
We discuss the collective modes of a trapped Bose gas in the hydrodynamic regime where atomic collisions ensure local thermal equilibrium for the distribution function. Starting fr…
Diffusion and localization in chaotic billiards
Fausto Borgonovi, Giulio Casati, Baowen Li
We study analytically and numerically the classical diffusive process which takes place in a chaotic billiard. This allows to estimate the conditions under which the statistical pr…
Electron Correlation and Charge Transfer Instability in Bilayered Two Dimensional Electron Gas
Sergio Conti, Gaetano Senatore
We prove that the predicted charge transfer state in symmetric bilayers of two dimensional electron gases is always unstable at zero bias voltage, due to interlayer correlation and…
Momentum distribution of liquid helium
Saverio Moroni, Gaetano Senatore, Stefano Fantoni
We have obtained the one--body density matrix and the momentum distribution of liquid He at K from Diffusion Monte Carlo (DMC) simulations, using trial function…
Valence band spectroscopy in V-grooved quantum wires
G. Goldoni, F. Rossi, E. Molinari +3
We present a combined theoretical and experimental study of the anisotropy in the optical absorption of V-shaped quantum wires. By means of realistic band structure calculations fo…
Impurity in a Luttinger liquid: a numerical study of the finite size energy spectrum and of the orthogonality catastrophe exponent
Shaojin Qin, Michele Fabrizio, Lu Yu
The behavior of a single impurity in a one-dimensional Luttinger liquid is numerically investigated by means of the density matrix renormalization group. By analyzing the finite si…
Microscopic Oscillations in the Quantum Nucleation of Vortices Subject to Periodic Pinning Potential in a Thin Superconductor
Roberto Iengo, Giancarlo Jug
We present a theory for the decay of a supercurrent through nucleation of vortex-antivortex pairs in a two-dimensional superconductor in the presence of dissipation and of a period…
Condensate fraction and critical temperature of a trapped interacting Bose gas
S. Giorgini, L. Pitaevskii, S. Stringari
By using a mean field approach, based on the Popov approximation, we calculate the temperature dependence of the condensate fraction of an interacting Bose gas confined in an aniso…
Diffusion in disordered media as a process with memory
Michele Vendruscolo, Matteo Marsili
The problem of a random walk in a disordered media is mapped into a model of a random walk with memory. The latter model, as opposed to the former one, does not make reference to a…
Vortex excitation in superfluid 4He: A Diffusion Monte Carlo study
S. Giorgini, J. Boronat, J. Casulleras
We present a diffusion Monte Carlo study of a single vortex in two-dimensional superfluid liquid He within the fixed node approximation. We use both the Feynman phase and an im…
Surprises in the Orbital Magnetic Moment and g-Factor of the Dynamic Jahn-Teller Ion C_{60}^-
Erio Tosatti, Nicola Manini, Olle Gunnarsson
We calculate the magnetic susceptibility and g-factor of the isolated C_{60}^- ion at zero temperature, with a proper treatment of the dynamical Jahn-Teller effect, and of the asso…
Beyond the Mean Field Approximation for Spin Glasses
M. Serva, G. Paladin
We study the d-dimensional random Ising model using a Bethe-Peierls approximation in the framework of the replica method. We take into account the correct interaction only inside r…
The surface chemistry of metal-oxygen interactions: a first-principles study of O:Rh(110)
Kurt Stokbro, Stefano Baroni
We report on a computational study of the clean and oxygen-covered Rh(110) surface, based on density-functional theory within the local-density approximation. We have used plane-wa…
Order Parameter at the Boundary of a Trapped Bose Gas
F. Dalfovo, L. Pitaevskii, S. Stringari
Through a suitable expansion of the Gross-Pitaevskii equation near the classical turning point, we obtain an explicit solution for the order parameter at the boundary of a trapped…
Charge-density-waves and superconductivity as an alternative to phase separation in the infinite-U Hubbard-Holstein model
F. Becca, M. Tarquini, M. Grilli +1
We investigate the density instabilities present in the infinite-U Hubbard-Holstein model both at zero and finite momenta as well as the occurrence of Cooper instabilities with a s…
Superconductivity from doping a spin liquid insulator: a simple one-dimensional example
Michele Fabrizio
We study the phase diagram of a one-dimensional Hubbard model where, in addition to the standard nearest neighbor hopping , we also include a next-to-nearest neighbor hopping $t…
Collective excitations of a trapped Bose-condensed gas
S. Stringari
By taking the hydrodynamic limit we derive, at , an explicit solution of the linearized time dependent Gross-Pitaevskii equation for the order parameter of a Bose gas confined…
Quantum Evaporation from the Free Surface of Superfluid 4He
F. Dalfovo, A. Fracchetti, A. Lastri +2
The scattering of atoms and rotons at the free surface of superfluid 4He is studied in the framework of linearised time dependent mean field theory. The phenomenological Orsay-Tren…
Growth Kinetics in a Phase Field Model with Continuous Symmetry
U. Marini Bettolo Marconi, A. Crisanti
We discuss the static and kinetic properties of a Ginzburg-Landau spherically symmetric model recently introduced (Phys. Rev. Lett. {\bf 75}, 2176, (1995)) in order to gener…