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119 papers · 1 filter
Phase diagram of the one-dimensional three-state Potts model with an additional mean-field interaction
Alessandro Campa, Vahan Hovhannisyan, Stefano Ruffo +1
We derive the phase diagram of the one-dimensional three-state Potts model with an additional mean-field interaction in the canonical ensemble. The free energy is obtained by mappi…
System-Bath Approach to Rotating Brownian Motion
Ashot Matevosyan, Armen E. Allahverdyan
Rotating equilibrated systems are widespread, but relatively little attention has been devoted to studying them from the first principles of statistical mechanics. We fill this gap…
Approximate calculation of functional integrals arising from the operator approach
Edik Ayryan, Ján Buša, Michal Hnatič +2
We apply the operator approach to a stochastic system belonging to a class of death-birth processes, which we introduce utilizing the master equation approach. By employing Doi- Pe…
Weak (non)conservation and stochastic dynamics of angular momentum
Ashot Matevosyan
Angular momentum conservation influences equilibrium statistical mechanics, leading to a generalized microcanonical density for an isolated system and a generalized Gibbs density f…
Magnetization plateaus and enhanced magnetocaloric effect of a spin-1/2 Ising-Heisenberg and Heisenberg double sawtooth ladder with four-spin interaction
Hamid Arian Zad, Vadim Ohanyan, Azam Zoshki +1
The ground state, the entropy and the magnetic Grüneisen parameter of the antiferromagnetic spin-1/2 Ising-Heisenberg model on a double sawtooth ladder are rigorously investigated…
Thermal transitions in a one-dimensional, finite-size Ising model
Varazdat Stepanyan, Andreas F. Tzortzakakis, David Petrosyan +1
We revisit the one-dimensional ferromagnetic Ising spin-chain with a finite number of spins and periodic boundaries and derive analytically and verify numerically its various stati…