Speaker
Description
In pure SU(N) gauge theory, we measure interface tensions between distinct deconfined phases (different $Z_N$-centers) using two complementary methods. These deconfined-deconfined (DD) interface tensions generally depend on the $Z_N$-phase shift across the interface and on the temperature T. We use a twisted boundary condition to produce two ordered phases simultaneously with a DD interface naturally lying between them. In the first method, we evaluate the surface tension by calculating the difference in free energy of the twisted and non-twisted lattices, employing multicanonical sampling to accurately measure the first-order phase transition region. In the second, we extend the mixed phase / capillary wave method previously applied to determine the interface tension of the confined-deconfined (CD) interface in pure SU(N > 3) gauge theory, to measure the DD interface. With these methods, we map the $T$-dependence of the different DD interface tensions in SU(4) and SU(8) to see whether they show Casimir scaling for $T \gg T_c$ and whether there is perfect wetting in the limit $T \rightarrow T_c$.