A numerical adaptation of SAW identities from the honeycomb to other 2D lattices

Details A numerical adaptation of SAW identities from the honeycomb to other 2D lattices A numerical adaptation of SAW identities from the honeycomb to other 2D lattices

2011-10-06

arxiv.org/abs/1110.1141v2

J. Phys. A 45, 035201 (2012)

Physics

Mathematical Physics

21 pages, 7 figures. Changes in v2: Improved numerical analysis, giving greater precision. Explanation of why we observe what

Scientific paper

Recently, Duminil-Copin and Smirnov proved a long-standing conjecture by Nienhuis that the connective constant of self-avoiding walks on the honeycomb lattice is $\sqrt{2+\sqrt{2}}.$ A key identity used in that proof depends on the existence of a parafermionic observable for self-avoiding walks on the honeycomb lattice. Despite the absence of a corresponding observable for SAW on the square and triangular lattices, we show that in the limit of large lattices, some of the consequences observed on the honeycomb lattice persist on other lattices. This permits the accurate estimation, though not an exact evaluation, of certain critical amplitudes, as well as critical points, for these lattices. For the honeycomb lattice an exact amplitude for loops is proved.

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