I encountered this term a uniform RVB spin-liquid state in some articles, for example, see the paragraph under Eq.(29) on page 9 in this paper.
What does the word 'uniform ' mean? Simply from the mean-field anzats(see Eq.(28)), how to see that the projected spin wave-function is a RVB state which is a superposition of spin-singlet states? And is the low-energy gauge structure of a uniform RVB spin-liquid state always $SU(2)$?
Thank you very much.
This post imported from StackExchange Physics at 2014-03-09 08:41 (UCT), posted by SE-user K-boy