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
111 papers · 1 filter
BEC in Nonextensive Statistical Mechanics
Luca Salasnich
We discuss the Bose-Einstein condensation (BEC) for an ideal gas of bosons in the framework of Tsallis's nonextensive statistical mechanics. We study the corrections to the standar…
Anomalous Spreading of Power-Law Quantum Wave Packets
Fabrizio Lillo, Rosario N. Mantegna
We introduce power-law tail quantum wave packets. We show that they can be seen as eigenfunctions of a Hamiltonian with a physical potential. We prove that the free evolution of th…
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…
Surface defreezing of glasses
E. A. Jagla, E. Tosatti
A glass surface may still flow below the bulk glass transition temperature, where the underlying bulk is frozen. Assuming the existence at T=T* of a bulk thermodynamical glass tran…
Viscous Flow and Jump Dynamics in Molecular Supercooled Liquids: II Rotations
Cristiano De Michele, Dino Leporini
The rotational dynamics of a supercooled molecular liquid is investigated by a molecular-dynamics numerical study. We detect rotational jumps with a waiting-time distribution which…
Quantum Resonances and Regularity Islands in Quantum Maps
V. V. Sokolov, O. V. Zhirov, D. Alonso +1
We study analytically as well as numerically the dynamics of a quantum map near a quantum resonance of an order q. The map is embedded into a continuous unitary transformation gene…
Geometric approach to Hamiltonian dynamics and statistical mechanics
Lapo Casetti, Marco Pettini, E. G. D. Cohen
This paper is a review of results which have been recently obtained by applying mathematical concepts drawn, in particular, from differential geometry and topology, to the physics…
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…
Lattice model for cold and warm swelling of polymers in water
Pierpaolo Bruscolini, Lapo Casetti
We define a lattice model for the interaction of a polymer with water. We solve the model in a suitable approximation. In the case of a non-polar homopolymer, for reasonable values…
A study of the mechanisms of the semi-insulating conversion of InP by anelastic spectroscopy
R. Cantelli, F. Cordero, O. Palumbo +4
Elastic energy absorption measurements versus temperature on semiconducting, semi-insulating (SI) and Fe-doped InP are reported. A thermally activated relaxation process is found o…
Strong coupling theory for driven tunneling and vibrational relaxation
M. Thorwart, M. Grifoni, P. Hänggi
We investigate on a unified basis tunneling and vibrational relaxation in driven dissipative multistable systems described by their N lowest lying unperturbed levels. By use of the…
Quantum effects on the BKT phase transition of two-dimensional Josephson arrays
Alessandro Cuccoli, Andrea Fubini, Valerio Tognetti +1
The phase diagram of two dimensional Josephson arrays is studied by means of the mapping to the quantum XY model. The quantum effects onto the thermodynamics of the system can be e…
Dynamics of the Number of Trades of Financial Securities
Giovanni Bonanno, Fabrizio Lillo, Rosario N. Mantegna
We perform a parallel analysis of the spectral density of (i) the logarithm of price and (ii) the daily number of trades of a set of stocks traded in the New York Stock Exchange. T…
Semiclassical approach to the thermodynamics of spin chains
Alessandro Cuccoli, Valerio Tognetti, Paola Verrucchi +1
Using the PQSCHA semiclassical method, we evaluate thermodynamic quantities of one-dimensional Heisenberg ferro- and antiferromagnets. Since the PQSCHA reduces their evaluation to…
Re-entrant spin susceptibility of a superconducting grain
A. Di Lorenzo, Rosario Fazio, F. W. J. Hekking +3
We study the spin susceptibility chi of a small, isolated superconducting grain. Due to the interplay between parity effects and pairing correlations, the dependence of chi on temp…
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…
General properties of propagation in chaotic systems
G. Giacomelli, R. Hegger, A. Politi +1
We conjecture that in one-dimensional spatially extended systems the propagation velocity of correlations coincides with a zero of the convective Lyapunov spectrum. This conjecture…
Topology and phase transitions: a paradigmatic evidence
Roberto Franzosi, Marco Pettini, Lionel Spinelli
We report upon the numerical computation of the Euler characteristic χ(a topologic invariant) of the equipotential hypersurfaces Σ_v of the configuration space of the two-dimension…
Motional Squashed States
Stefano Mancini, David Vitali, Paolo Tombesi
We show that by using a feedback loop it is possible to reduce the fluctuations in one quadrature of the vibrational degree of freedom of a trapped ion below the quantum limit. The…
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…
Classical statistical mechanics of a few-body interacting spin model
F. Borgonovi, F. M. Izrailev
We study the emergence of Boltzmann's law for the "single particle energy distribution" in a closed system of interacting classical spins. It is shown that for a large number of pa…
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…
Thermodynamics of supercooled liquids in the inherent structure formalism: a case study
F. Sciortino, W. Kob, P. Tartaglia
In this article we review the thermodynamics of liquids in the framework of the inherent structure formalism. We then present calculations of the distribution of the basins in the…
Aging in a simple glassformer
Walter Kob, Jean-Louis Barrat, Francesco Sciortino +1
Using molecular dynamics computer simulations we investigate the out-of-equilibrium dynamics of a Lennard-Jones system after a quench from a high temperature to one below the glass…