2 papers
hep-lat1999
Low-temperature expansion in link formulation. II
O. Borisenko, V. Kushnir
We extend our previous analysis to arbitrary two dimensional SU(N) principal chiral model in a link formulation. A general expression for the second order coefficient of fixed dist…
hep-lat1998
May vortices produce a mass gap in 2D spin models at weak coupling
O. Borisenko, P. Skala
We consider the 2D SU(N) principal chiral model and discuss a vortex condensation mechanism which could explain the existence of a non-zero mass gap at arbitrarily small values of…