Abstract: | Using results from conformal field theory, we compute several universal amplitude ratios for the two-dimensional Ising model at criticality on a symmetric torus. These include the correlation-length ratio x
=lim
L
(L)/L and the first four magnetization moment ratios V
2n
=
2n
/
2
n
. As a corollary we get the first four renormalized 2n-point coupling constants for the massless theory on a symmetric torus, G*2n
. We confirm these predictions by a high-precision Monte Carlo simulation. |