A mean field approach for string condensed states

Details A mean field approach for string condensed states A mean field approach for string condensed states

2006-11-01

arxiv.org/abs/cond-mat/0611031v1

Phys. Rev. B 75, 075116 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages + appendix, 15 figures

Scientific paper

10.1103/PhysRevB.75.075116

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 phases transitions beyond Landau's symmetry breaking paradigm. We demonstrate the technique with a simple example: the spin-1 XXZ model on the Kagome lattice. The mean field calculation predicts a number of phases and phase transitions, including a z=2 deconfined quantum critical point.

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