Loss of coherence and superfluid depletion in an optical quasicrystal
2013 (English)In: Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, E-ISSN 1361-6455, Vol. 46, no 8, 085302- p.Article in journal (Refereed) Published
We study numerically a 2D Bose-Einstein condensate in a quasiperiodic array of potential peaks, assumed to be generated by superimposing five blue detuned laser beams. By using a Bogoliubov ansatz we show that the system experiences a loss of coherence and starts developing a normal part. We give estimates where a phase transition to an insulating phase should happen for the use of future experiments, along with a study of the validity of the Bogoliubov approximation.
Place, publisher, year, edition, pages
2013. Vol. 46, no 8, 085302- p.
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:umu:diva-71084DOI: 10.1088/0953-4075/46/8/085302ISI: 000317386800011OAI: oai:DiVA.org:umu-71084DiVA: diva2:629413