Resonating plaquette phases in large spin cold atom systems

Details Resonating plaquette phases in large spin cold atom systems Resonating plaquette phases in large spin cold atom systems

2008-01-04

arxiv.org/abs/0801.0744v1

Phys. Rev. B 77, 134449 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 3 figures

Scientific paper

10.1103/PhysRevB.77.134449

Large spin cold atom systems can exhibit novel magnetic properties which do not appear in usual spin-1/2 systems. We investigate the SU(4) resonating plaquette state in the three dimensional cubic optical lattice with spin-3/2 cold fermions. A novel gauge field formalism is constructed to describe the Rokhsar-Kivelson type of Hamiltonian and a duality transformation is used to study the phase diagram. Due to the proliferation of topological defects, the system is generally gapped for the whole phase diagram of the quantum model, which agrees with the recent numerical studies. A critical line is found for the classical plaquette system, which also corresponds to a quantum many-body wavefunction in a "plaquette liquid phase".

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