Vacuum curves, classical integrable systems in discrete space-time and statistical physics

Abstract

A dynamical system with discrete time is studied by means of algebraic geometry. The system admits a reduction that is interpreted as a classical field theory in 2+1-dimensional wholly discrete space-time. The integrals of motion of a particular case of the reduced system are shown to coincide, in essence, with the statistical sum of the well-known (inhomogeneous) 2-dimensional dimer model (the statistical sum is here a function of two parameters). Possible generalizations of the system are examined.

18 pages. Talk made at the Lobachevsky Semester in Euler International Math Institute, S Petersburg, November 1992

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