Topological Order in Gutzwiller Projected Wave Functions for Quantum Antiferromagnets

Details Topological Order in Gutzwiller Projected Wave Functions for Quantum Antiferromagnets Topological Order in Gutzwiller Projected Wave Functions for Quantum Antiferromagnets

2006-04-21

arxiv.org/abs/cond-mat/0604516v1

Physics

Condensed Matter

Superconductivity

4 pages, 1 figure

Scientific paper

10.1103/PhysRevB.75.172502

We study the topological order in RVB state derived from Gutzwiller projection of BCS-like mean field state. We propose to construct the topological excitation on the projected RVB state through Gutzwiller projection of mean field state with inserted $Z_{2}$ flux tube. We prove that all projected RVB states derived from bipartite effective theories, no matter the gauge structure in the mean field ansatz, are positive definite in the sense of the Marshall sign rule, which provides a universal origin for the absence of topological order in such RVB state.

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