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
31 papers · 2 filters
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…
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…
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…
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…
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…
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…
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…
Driven Tunneling Dynamics: Bloch-Redfield Theory versus Path Integral Approach
Ludwig Hartmann, Igor Goychuk, Milena Grifoni +1
In the regime of weak bath coupling and low temperature we demonstrate numerically for the spin-boson dynamics the equivalence between two widely used but seemingly different roads…
Cluster variation - Pade` approximants method for the simple cubic Ising model
Alessandro Pelizzola
The cluster variation - Pade` approximant method is a recently proposed tool, based on the extrapolation of low/high temperature results obtained with the cluster variation method,…
Statistical Properties of Statistical Ensembles of Stock Returns
Fabrizio Lillo, Rosario N. Mantegna
We select n stocks traded in the New York Stock Exchange and we form a statistical ensemble of daily stock returns for each of the k trading days of our database from the stock pri…
Modeling Market Mechanism with Minority Game
Damien Challet, Matteo Marsili, Yi-Cheng Zhang
Using the Minority Game model we study a broad spectrum of problems of market mechanism. We study the role of different types of agents: producers, speculators as well as noise tra…
Self-Trapping, Quantum Tunneling and Decay Rates for a Bose Gas with Attractive Nonlocal Interaction
Luca Salasnich
We study the Bose-Einstein condensation for a cloud of Li atoms with attractive nonlocal (finite-range) interaction in a harmonic trap. In addition to the low-density metastabl…
Cluster variation method and disorder varieties of two-dimensional Ising-like models
Alessandro Pelizzola
I show that the cluster variation method, long used as a powerful hierarchy of approximations for discrete (Ising-like) two-dimensional lattice models, yields exact results on the…
Dynamics and statistics of simple models with infinite-range attractive interaction
Mickael Antoni, Stefano Ruffo, Alessandro Torcini
In this paper we review a series of results obtained for 1D and 2D simple N-body dynamical models with infinite-range attractive interactions and without short distance singulariti…
Time-Dependent Variational Approach to Bose-Einstein Condensation
Luca Salasnich
We discuss the mean-field approximation for a trapped weakly-interacting Bose-Einstein condensate (BEC) and its connection with the exact many-body problem by deriving the Gross-Pi…
Bose Condensate in a Double-Well Trap: Ground State and Elementary Excitations
L. Salasnich, A. Parola, L. Reatto
We study the Bose-Einstein condensate in the MIT double-well trap. We calculate the ground state density profile of Na atoms and the Bogoliubov spectrum of the elementary ex…
Exact solution of a modified El Farol's bar problem: Efficiency and the role of market impact
Matteo Marsili, Damien Challet, Riccardo Zecchina
We discuss a model of heterogeneous, inductive rational agents inspired by the El Farol Bar problem and the Minority Game. As in markets, agents interact through a collective aggre…
Towards the Thermodynamics of Localization Processes
Paolo Grigolini, Marco G. Pala, Luigi Palatella +1
We study the entropy time evolution of a quantum mechanical model, which is frequently used as a prototype for Anderson's localization. Recently Latora and Baranger [V. Latora, M.…
Inherent Structure Entropy of Supercooled Liquids
F. Sciortino, W. Kob, P. Tartaglia
We present a quantitative description of the thermodynamics in a supercooled binary Lennard Jones liquid via the evaluation of the degeneracy of the inherent structures, i.e. of th…
Driving-Induced Symmetry Breaking in the Spin-Boson System
Holger Adam, Manfred Winterstetter, Milena Grifoni +1
A symmetric dissipative two-state system is asymptotically completely delocalized independent of the initial state. We show that driving-induced localization at long times can take…
The inverse Mermin-Wagner theorem for classical spin models on graphs
R. Burioni, D. Cassi, A. Vezzani
In this letter we present the inversion of the Mermin-Wagner theorem on graphs, by proving the existence of spontaneous magnetization at finite temperature for classical spin model…
The Potts Fully Frustrated model: Thermodynamics, percolation and dynamics in 2 dimensions
Giancarlo Franzese
We consider a Potts model diluted by fully frustrated Ising spins. The model corresponds to a fully frustrated Potts model with variables having an integer absolute value and a sig…