The spectral gap of the 2-D stochastic Ising model with mixed boundary conditions

Details The spectral gap of the 2-D stochastic Ising model with mixed boundary conditions The spectral gap of the 2-D stochastic Ising model with mixed boundary conditions

2000-08-25

arxiv.org/abs/math/0008201v1

Mathematics

Probability

18 pages

Scientific paper

We establish upper bounds for the spectral gap of the stochastic Ising model at low temperatures in an n-by-n box with boundary conditions which are not purely plus or minus; specifically, we assume the magnitude of the sum of the boundary spins over each interval of length n in the boundary is bounded by \delta n, where \delta < 1. We show that for any such boundary condition, when the temperature is sufficiently low (depending on \delta), the spectral gap decreases exponentially in n.

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