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Single-atom density of states of an optical lattice

Hooley, Chris, Quintanilla, Jorge (2004) Single-atom density of states of an optical lattice. Physical Review Letters: Moving Physics Forward, 93 (8). 080404. ISSN 0031-9007. (doi:10.1103/PhysRevLett.93.080404) (KAR id:26063)

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We consider a single atom in an optical lattice, subject to a harmonic trapping potential. The problem is treated in the tight-binding approximation,

with an extra parameter kappa denoting the strength of the harmonic

trap. It is shown that the kappa-->0 limit of this problem is singular,

in the sense that the density of states for a very shallow trap (kappa-->0)

is qualitatively different from that of a translationally invariant

lattice (kappa=0). The physics of this difference is discussed, and

densities of states and wave functions are exhibited and explained.

Item Type: Article
DOI/Identification number: 10.1103/PhysRevLett.93.080404
Uncontrolled keywords: Physics of Quantum Materials
Subjects: Q Science > QC Physics
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Jorge Quintanilla Tizon
Date Deposited: 22 Nov 2010 21:05 UTC
Last Modified: 16 Nov 2021 10:04 UTC
Resource URI: (The current URI for this page, for reference purposes)

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