Year: 2007
Type: article
Abstract: We describe a mean field technique for quantum string (or dimer) models. Unlike traditional mean field approaches, the method is general enough to include string condensed phases in addition to the usual symmetry breaking phases. Thus, it can be used to study phases and phase transitions beyond Landau's symmetry breaking paradigm. We demonstrate the technique with a simple example: the spin-$1$ XXZ model on the kagom\'e lattice. The mean field calculation predicts a number of phases and phase transitions, including a $z=2$ deconfined quantum critical point.
Source: Physical Review B
Authors: Michael Levin, Xiao-Gang Wen
Institution: Massachusetts Institute of Technology
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2012509098