Bose-Einstein quantum phase transition in an optical lattice model

Autor(en)

M Aizenman, E H Lieb, Robert Seiringer, J P Solovej, Jakob Yngvason

Abstrakt

An optical lattice model developed that is similar to the Bose-Hubbard model to describe the transition between Bose-Einstein condensation (BEC) and a Mott insulator state was analyzed. It was found that the system was a hard core lattice gas at half of the maximum density and the optical lattice was modeled by a periodic potential of strength λ. It was also observed that the interparticle interaction was essential for this transition that occurred even in the ground state. The results show that all the essential features could be proved rigorously such as the existence of BEC for small λ and its suppression for a large λ.

Organisation(en)

Mathematische Physik

Externe Organisation(en)

Princeton University, Technical University of Denmark (DTU)

Journal

Physical Review A

Band

70

Anzahl der Seiten

12

ISSN

1050-2947

DOI

https://doi.org/10.1103/PhysRevA.70.023612

Publikationsdatum

2004

Peer-reviewed

Ja

ÖFOS 2012

103036 Theoretische Physik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/86b61762-3c2b-4919-a8bc-05d66efbd9fe