Gas of self-avoiding loops on the brickwork lattice

Details Gas of self-avoiding loops on the brickwork lattice Gas of self-avoiding loops on the brickwork lattice

1997-12-30

arxiv.org/abs/cond-mat/9712317v1

Physics

Condensed Matter

Statistical Mechanics

19 pages, 6 figures. to appear in J. Phys. A : Math. & Gen

Scientific paper

10.1088/0305-4470/31/7/005

An exact calculation of the phase diagram for a loop gas model on the brickwork lattice is presented. The model includes a bending energy. In the dense limit, where all the lattice sites are occupied, a phase transition occuring at an asymmetric Lifshitz tricritical point is observed as the temperature associated with the bending energy is varied. Various critical exponents are calculated. At lower densities, two lines of transitions (in the Ising universality class) are observed, terminated by a tricritical point, where there is a change in the modulation of the correlation function. To each tricritical point an associated disorder line is found.

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