edoc

Perturbative corrections to the Gutzwiller mean-field solution of the Mott-Hubbard model

Schroll, C. and Marquardt, F. and Bruder, C.. (2004) Perturbative corrections to the Gutzwiller mean-field solution of the Mott-Hubbard model. Physical review A, General physics, Vol. 70, H. 5 , 053609, 10 S..

Full text not available from this repository.

Official URL: http://edoc.unibas.ch/dok/A5252839

Downloads: Statistics Overview

Abstract

We study the Mott-insulator transition of bosonic atoms in optical lattices. Using perturbation theory, we analyze the deviations from the mean-field Gutzwiller ansatz, which become appreciable for intermediate values of the ratio between hopping amplitude and interaction energy. We discuss corrections to number fluctuations, order parameter, and compressibility. In particular, we improve the description of the short-range correlations in the one-particle density matrix. These corrections are important for experimentally observed expansion patterns, both for bulk lattices and in a confining trap potential.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Bruder)
UniBasel Contributors:Bruder, Christoph
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Institute of Physics
ISSN:1050-2947
Note:Publication type according to Uni Basel Research Database: Journal article
Related URLs:
Identification Number:
Last Modified:22 Mar 2012 14:25
Deposited On:22 Mar 2012 13:49

Repository Staff Only: item control page