Atomic quantum gases in Kagomé lattices

Details Atomic quantum gases in Kagomé lattices Atomic quantum gases in Kagomé lattices

2004-01-26

arxiv.org/abs/cond-mat/0401502v2

Phys. Rev. Lett. 93, 030601 (2004)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 1 figure. Missing affiliations added

Scientific paper

10.1103/PhysRevLett.93.030601

We demonstrate the possibility of creating and controlling an ideal and \textit{trimerized} optical Kagom\'e lattice, and study the low temperature physics of various atomic gases in such lattices. In the trimerized Kagom\'e 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.

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