Single-atom density of states of an optical lattice

Hooley, C. and Quintanilla, J. (2004) Single-atom density of states of an optical lattice. Physical Review Letters, 93 (8). 080404 .

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Official URL http://dx.doi.org/10.1103/PhysRevLett.93.080404

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 > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group
Depositing User:	J. Quintanilla-Tizon
Date Deposited:	22 Nov 2010 21:05
Last Modified:	06 Sep 2011 05:42
Resource URI:	http://kar.kent.ac.uk/id/eprint/26063 (The current URI for this page, for reference purposes)

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