Single-atom density of states of an optical lattice

Hooley, Chris and 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:https://doi.org/10.1103/PhysRevLett.93.080404) (Full text available)

Abstract

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
Subjects:	Q Science > QC Physics
Divisions:	Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User:	Jorge Quintanilla
Date Deposited:	22 Nov 2010 21:05 UTC
Last Modified:	17 Jan 2017 13:00 UTC
Resource URI:	https://kar.kent.ac.uk/id/eprint/26063 (The current URI for this page, for reference purposes)

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