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
23 papers · 2 filters
The mechanism for the 3 x 3 distortion of Sn/ge (111)
S. de Gironcoli, S. Scandolo, G. Ballabio +2
We show that two distinct ground states, one nonmagnetic, metallic, and distorted, the other magnetic, semimetallic (or insulating) and undistorted, compete in -pha…
Dynamic structure factor and momentum distribution of a trapped Bose gas
F. Zambelli, L. P. Pitaevskii, D. M. Stamper-Kurn +1
The dynamic structure factor of a trapped Bose-Einstein condensed gas is investigated at zero temperature in the framework of Bogoliubov theory. Different values of momentum transf…
Collisionless dynamics of dilute Bose gases: Role of quantum and thermal fluctuations
S. Giorgini
We study the low-energy collective oscillations of a dilute Bose gas at finite temperature in the collisionless regime. By using a time-dependent mean-field scheme we derive for th…
Quantum Poincare Recurrences for Hydrogen Atom in a Microwave Field
Giuliano Benenti, Giulio Casati, Giulio Maspero +1
We study the time dependence of the ionization probability of Rydberg atoms driven by a microwave field, both in classical and in quantum mechanics. The quantum survival probabilit…
Thermodynamics of a trapped Bose condensate with negative scattering length
B. Pozzi, L. Salasnich, A. Parola +1
We study the Bose-Einstein condensation (BEC) for a system of atoms, which have negative scattering length (attractive interaction), confined in a harmonic potential. Within…
Spin fractionalization of an even number of electrons in a Quantum dot
Domenico Giuliano, Arturo Tagliacozzo
An experiment is proposed of non perturbative tunneling in a Quantum dot connected to leads in a pillar configuration, which would shed light on the physics of the mesoscopic Kondo…
A superfluid hydrodynamic model for the enhanced moments of inertia of molecules in liquid 4He
C. Callegari, A. Conjusteau, I. Reinhard +3
We present a superfluid hydrodynamic model for the increase in moment of inertia, , of molecules rotating in liquid He. The static inhomogeneous He density around each mole…
Dynamics of simulated water under pressure
Francis W. Starr, Francesco Sciortino, H. Eugene Stanley
We present molecular dynamics simulations of the SPC/E model of water to probe the dynamic properties at temperatures from 350 K down to 190 K and pressures from 2.5GPa (25kbar) do…
Nucleation in dilute 3He-4He liquid mixtures at low temperatures
M. Barranco, M. Guilleumas, D. M. Jezek +3
We present a study of phase separation from supersaturated 3He-4He liquid mixtures at low temperatures addressing both the degree of critical supersaturation Dx and the thermal-to-…
Free expansion of Bose-Einstein condensates with quantized vortices
Franco Dalfovo, Michele Modugno
The expansion of Bose-Einstein condensates with quantized vortices is studied by solving numerically the time-dependent Gross-Pitaevskii equation at zero temperature. For a condens…
Fidelity and leakage of Josephson qubits
Rosario Fazio, G. Massimo Palma, Jens Siewert
The unit of quantum information is the qubit, a vector in a two-dimensional Hilbert space. On the other hand, quantum hardware often operates in two-dimensional subspaces of vector…
Temperature-induced resonances and Landau damping of collective modes in Bose-Einstein condensed gases in spherical traps
M. Guilleumas, L. P. Pitaevskii
Interaction between collective monopole oscillations of a trapped Bose-Einstein condensate and thermal excitations is investigated by means of perturbation theory. We assume spheri…
First-Order Phase Transition in a Quantum Hall Ferromagnet
Vincenzo Piazza, Vittorio Pellegrini, Fabio Beltram +3
The single-particle energy spectrum of a two-dimensional electron gas in a perpendicular magnetic field consists of equally-spaced spin-split Landau levels, whose degeneracy is pro…
Interference of Bose-Einstein condensates in momentum space
L. Pitaevskii, S. Stringari
We suggest an experiment to investigate the linear superposition of two spatially separated Bose-Einstein condensates. Due to the coherent combination of the two wave functions, th…
Collective oscillations of an interacting trapped Fermi gas
L. Vichi, S. Stringari
We calculate the effects of two-body interactions on the low frequency oscillations of a normal Fermi gas confined in a harmonic trap. The mean field contribution to the collective…
Prewetting transitions of Ar and Ne on alkali metal surfaces
Francesco Ancilotto, Flavio Toigo
We have studied by means of Density-Functional calculations the wetting properties of Ar and Ne adsorbed on a plane whose adsorption properties simulate the Li and Na surfaces. We…
Two-scale competition in phase separation with shear
F. Corberi, G. Gonnella, A. Lamura
The behavior of a phase separating binary mixture in uniform shear flow is investigated by numerical simulations and in a renormalization group (RG) approach. Results show the simu…
Phase-ordering dynamics of binary mixtures with field-dependent mobility in shear flow
G. Gonnella, A. Lamura, D. Suppa
The effect of shear flow on the phase-ordering dynamics of a binary mixture with field-dependent mobility is investigated. The problem is addressed in the context of the time-depen…
Lee-Yang zeros and the Ising model on the Sierpinski Gasket
R. Burioni, D. Cassi, L. Donetti
We study the distribution of the complex temperature zeros for the partition function of the Ising model on a Sierpinski gasket using an exact recursive relation. Although the zero…
Ground state of a homogeneous Bose gas: a diffusion Monte Carlo calculation
S. Giorgini, J. Boronat, J. Casulleras
We use a diffusion Monte Carlo method to calculate the lowest energy state of a uniform gas of bosons interacting through different model potentials, both strictly repulsive and wi…
Bosons in a Toroidal Trap: Ground State and Vortices
L. Salasnich, A. Parola, L. Reatto
We study the Bose-Einstein condensate (BEC) in a 3-D toroidal Mexican hat trap. By changing the parameters of the potential, or the number of bosons, it is possible to modify stron…
Slow dynamics of water under pressure
Francis W. Starr, Stephen Harrington, Francesco Sciortino +1
We perform lengthy molecular dynamics simulations of the SPC/E model of water to investigate the dynamics under pressure at many temperatures and compare with experimental measurem…
Study of a Nonlocal Density scheme for electronic--structure calculations
Maurizia Palummo, Giovanni Onida, Rodolfo Del Sole
An exchange-correlation energy functional beyond the local density approximation, based on the exchange-correlation kernel of the homogeneous electron gas and originally introduced…