期刊
PHYSICAL REVIEW E
卷 90, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.90.062141
关键词
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资金
- Ministry of Education and Science of the Russian Federation [02..49.21.0003]
- Lobachevsky State University of Nizhni Novgorod [02..49.21.0003]
- CEFIPRA Project [4604-3]
- INFN
- CNPq
- FAPERGS
- INCT-FCx
- US-AFOSR [FA9550-12-1-0438]
We explore ensemble inequivalence in long-range interacting systems by studying an XY model of classical spinswith ferromagnetic and nematic coupling. We demonstrate the inequivalence bymapping themicrocanonical phase diagram onto the canonical one, and also by doing the inverse mapping. We show that the equilibrium phase diagrams within the two ensembles strongly disagree within the regions of first-order transitions, exhibiting interesting features like temperature jumps. In particular, we discuss the coexistence and forbidden regions of different macroscopic states in both the phase diagrams.
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