33 citations · 37 across the 3 of their papers we have counts for
4 papers
Computation of microcanonical entropy at fixed magnetization without direct counting
Alessandro Campa, Giacomo Gori, Vahan Hovhannisyan +2
We discuss a method to compute the microcanonical entropy at fixed magnetization without direct counting. Our approach is based on the evaluation of a saddle-point leading to an op…
Ising chains with competing interactions in presence of long-range couplings
Alessandro Campa, Giacomo Gori, Vahan Hovhannisyan +2
In this paper we study an Ising spin chain with short-range competing interactions in presence of long-range ferromagnetic interactions in the canonical ensemble. The simultaneous…
Complete analysis of ensemble inequivalence in the Blume-Emery-Griffiths model
V. V. Hovhannisyan, N. S. Ananikian, A. Campa +1
We study inequivalence of canonical and microcanonical ensembles in the mean-field Blume-Emery-Griffiths model. This generalizes previous results obtained for the Blume-Capel model…
Kagome Approximation for 3He on Husimi Lattice with Two- and Three-Site Exchange Interactions
N. Ananikian, V. Hovhannisyan, H. Lazaryan
The Ising approximation of the Heisenberg model in a strong magnetic field, with two-, and three-spin exchange interactions are studied on a Husimi lattice. This model can be consi…