Quantum dimer model
The quantum dimer model was introduced by Rokhsar and Kivelson Physical Review Letters 61, 2376 (1988) as an effective theory for the lowlying singlet excitations above paramagnetic ground states of quantum antiferromagnets. It was shown in paper 1 and paper 3 that a dual theory of such models on bipartite lattices was essentially identical to models obtained
from a semiclassical theory of the quantum fluctuations of the Neel order. The results described in this web page then immediately implied that the quantum dimer model generically had only "crystalline" phases (in which the dimers spontaneously break translational symmetry) on such lattices (isolated critical points without crystalline
order are allowed).
The properties of quantum dimer models on nonbipartite lattices (more precisely, for antiferromagnets in which the classical ground state had noncollinear order)
were discussed in papers 4,5,6,7. The connection with an odd Z_{2} gauge theory (and a closely related theory of a compact U(1) gauge field coupled to charge 2
Higgs scalars) was made, and the results on this web page then implied that such models could have "spinliquid" or RVB states. In particular,
paper 6 was the first to suggest that such states should exist for the quantum dimer model
on the kagome and triangular lattices.
The above predictions have been verified in studies by
Moessner and Sondhi, Physical Review Letters 86, 1881 (2001), Moessner, Sondhi, and Chandra, Physical Review B 64, 144416 (2001), Moessner, Sondhi, and Fradkin, Physical Review B 65, 024504 (2002), Ioffe, Feigel'man, Ioselevich, Ivanov, Troyer, and Blatter
Nature 415, 503 (2002) and Misguich, Serban, and Pasquier condmat/0204428.
PAPERS

SineGordon theory of the nonNeel phase of twodimensional
quantum antiferromagnets, W. Zheng and S. Sachdev, Physical Review
B 40, 2704 (1989).

SpinPeierls ground states of the quantum dimer model:
a finite size study, S. Sachdev, Physical Review B 40, 5204
(1989).

SpinPeierls, valence bond solid, and Neel ground states
of low dimensional quantum antiferromagnets, N. Read and S. Sachdev,
Physical Review B 42, 4568 (1990)  see Appendix A.

RVB and odd Z_{2} spin liquids, S. Sachdev, unpublished
notes dated July 30, 1990. The final results of these notes were announced in paper 5, and full details were published in paper 7.

Spontaneous alignment of frustrated bonds in an anisotropic,
three dimensional Ising model, R. Jalabert and S. Sachdev, Physical
Review B 44, 686 (1991).

Kagome and triangular lattice Heisenberg antiferromagnets:
ordering from quantum fluctuations and quantumdisordered ground states
with deconfined bosonic spinons, S. Sachdev, Physical Review B 45,
12377 (1992).

Translational symmetry breaking in twodimensional antiferromagnets
and superconductors, S. Sachdev and M. Vojta, Journal of the Physical
Society of Japan 69, Suppl. B, 1 (2000); condmat/9910231.

Field theories of paramagnetic Mott insulators, S. Sachdev, Proceedings of the
International Conference on Theoretical Physics, Paris, UNESCO, 2227 July 2002, Annales Henri
Poincare 4, 559 (2003); condmat/0304137.
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