Atomic quantum gases in Kagomé lattices
arXiv:cond-mat/0401502 · doi:10.1103/PhysRevLett.93.030601
Abstract
We demonstrate the possibility of creating and controlling an ideal and \textit{trimerized} optical Kagomé lattice, and study the low temperature physics of various atomic gases in such lattices. In the trimerized Kagomé lattice, a Bose gas exhibits a Mott transition with fractional filling factors, whereas a spinless interacting Fermi gas at 2/3 filling behaves as a quantum magnet on a triangular lattice. Finally, a Fermi-Fermi mixture at half filling for both components represents a frustrated quantum antiferromagnet with a resonating-valence-bond ground state and quantum spin liquid behavior dominated by continuous spectrum of singlet and triplet excitations. We discuss the method of preparing and observing such quantum spin liquid employing molecular Bose condensates.
arXiv comment4 pages, 1 figure. Missing affiliations added
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