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清华高研院学术报告：Solvable Lattice Gas Models With Three Phases

Title： Solvable Lattice Gas Models With Three Phases Speaker： Dr. WEI Bobo（Department of Physics, The Chinese University of Hong Kong） Time： 4:00pm, Thursday, May 9, 2013 Venue： Conference Hall 104, Science Building, Tsinghua University Abstract: Utilizing the brilliant solution by Onsager and Kaufman of the two-dimensional (2D) Ising model, a lattice gas model was constructed by Lee and Yang in 1952 for which the two phase region in its p-V diagram is analytically known. In the present work, we construct duplex models which have three phases, not just two, and for which the phase boundary in p-T diagrams and in p-V diagrams can both be exactly calculated. These models have two sublattices, and long range order form separately in the sublattices, creating a kind of partial order.