PHYSICS BEYOND INSTANTONS: MEASURING THE PHYSICAL CORRELATION LENGTH.
Sourendu Gupta and A. Irb\"ack
Abstract: In broken-symmetry phases of models with discrete global
symmetry, the physical correlation length can be measured using time-
slice correlators projected to non-zero momenta. A transfer matrix
based argument is used to construct the finite-size scaling for this
quantity. We extract the correlation length for the two-dimensional
ten-state Potts model by this means, and the surface tension from the
zero momentum correlator.