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Mott–Hubbard transition of cold atoms in optical lattices

Journal of optics. B, Quantum and semiclassical optics, 2003-04, Vol.5 (2), p.S9-S16 [Peer Reviewed Journal]

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Title:
Mott–Hubbard transition of cold atoms in optical lattices
Author: Zwerger, Wilhelm
Subjects: Atomic and molecular physics ; Atomic properties and interactions with photons ; Classical and quantum physics: mechanics and fields ; Exact sciences and technology ; Matter waves ; Optical cooling of atoms; trapping ; Photon interactions with atoms ; Physics
Is Part Of: Journal of optics. B, Quantum and semiclassical optics, 2003-04, Vol.5 (2), p.S9-S16
Description: We discuss the superfluid (SF) to Mott-insulator transition of cold atoms in optical lattices recently observed by Greiner et al. (2002). The fundamental properties of both phases and their experimental signatures are discussed carefully, including the limitations of the standard Gutzwiller approximation. It is shown that in a 1D dilute Bose-gas with a strong transverse confinement (Tonks-gas), even an arbitrary weak optical lattice is able to induce a Mott-like state with crystalline order, provided the dimensionless interaction parameter is larger than a critical value of order one. The SF-insulator transition of the Bose-Hubbard model in this case continuously evolves into a transition of the commensurate-incommensurate type with decreasing strength of the external optical lattice.
Publisher: Bristol: IOP Publishing
Language: English
Identifier: ISSN: 1464-4266
EISSN: 1741-3575
DOI: 10.1088/1464-4266/5/2/352
Source: Alma/SFX Local Collection

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