964 citations · 1.2k across the 6 of their papers we have counts for
10 papers
Statistical mechanics and dynamics of solvable models with long-range interactions
A. Campa, T. Dauxois, S. Ruffo
The two-body potential of systems with long-range interactions decays at large distances as , with , where is the space dimension. Examples are: gravit…
Dynamical phase transitions in long-range Hamiltonian systems and Tsallis distributions with a time-dependent index
Alessandro Campa, Pierre-Henri Chavanis, Andrea Giansanti +1
We study dynamical phase transitions in systems with long-range interactions, using the Hamiltonian Mean Field (HMF) model as a simple example. These systems generically undergo a…
Long time behavior of quasi-stationary states of the Hamiltonian Mean-Field model
Alessandro Campa, Andrea Giansanti, Gianluca Morelli
The Hamiltonian Mean-Field model has been investigated, since its introduction about a decade ago, to study the equilibrium and dynamical properties of long-range interacting syste…
Negative magnetic susceptibility and nonequivalent ensembles for the mean-field spin model
A. Campa, S. Ruffo, H. Touchette
We calculate the thermodynamic entropy of the mean-field spin model in the microcanonical ensemble as a function of the energy and magnetization of the model. The entropy and…
Long-Range Effects in Layered Spin Structures
Alessandro Campa, Ramaz Khomeriki, David Mukamel +1
We study theoretically layered spin systems where long-range dipolar interactions play a relevant role. By choosing a specific sample shape, we are able to reduce the complex Hamil…
On the computation of the entropy in the microcanonical ensemble for mean-field-like systems
Alessandro Campa
Two recently proposed expressions for the computation of the entropy in the microcanonical ensemble are compared, and their equivalence is proved. These expressions are valid for a…