STRONG-COUPLING EXPANSION OF STRING TENSION FOR Z(2) LATTICE GAUGE-THEORY IN 3 DIMENSIONS

We calculate the strong coupling expansion of string tension to order beta34 in D = 3 Z2 lattice gauge theory, which is equivalent to the low temperature expansion of the surface tension in the D = 3 Ising model. We obtain the expansion series by a linear combination of the string tension on finite size lattices, whose coefficients are determined recursively. A preliminary Pade analysis of the string tension at the roughening transition point is also given.