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Institute of Theoretical Physics |
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Chinese Academy of Sciences |
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State Key Laboratory of Theoretical Physics |
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Seminar |
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Title
题目 |
Potts Antiferromagnetism in Two and Three Dimensions |
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Speaker
报告人 |
Prof. You-Jin Deng |
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Affiliation
所在单位 |
University of Science and Technology of China |
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Date
日期 |
14:30, Sep 21 (Monday), 2015 |
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Venue
地点 |
Conference Hall 322, ITP/理论物理所322报告厅 |
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Abstract
摘要 |
The Potts model—a simple statistical-mechanical system—plays an important role in the theory of critical phenomena and finds various application in condensed-matter physics and beyond. The ferromagnetic Potts model is now well understood, thanks to universality. In two dimensions, much exact information is available due to analytic solution and the development of conformal field theory, via its connection with Coulomb-gas theory and Schramm-Loewner evolution (SLE). In this seminar, I shall report two recent studies of the q-state Potts antiferromagnet. I shall present argument as well as numerical evidence that the Potts antiferromagnet with arbitrarily large values of q can have a finite-temperature phase transition on some families of two-dimensional lattices. I will also demonstrate that the emergent continuous symmetry can occur in a series of three-dimensional Potts model. |
