3 papers
cond-mat.stat-mech2026
Restoration of Ensemble Equivalence by Quantum Fluctuations
Alessandro Campa, Andrea Trombettoni
We study the thermodynamic phase diagram of a one-dimensional quantum spin chain subjected to both mean-field and nearest-neighbor interactions, and to a transverse magnetic field…
cond-mat.stat-mech2026
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…
cond-mat.stat-mech2025
Ensemble Inequivalence in Ising Chains with Competing Interactions
Alessandro Campa, Vahan Hovhannisyan, Stefano Ruffo +1
We study the effect of competing interactions on ensemble inequivalence. We consider a one-dimensional Ising model with ferromagnetic mean-field interactions and short-range neares…