Towards a Bose glass transition in an optical Penrose quasicrystal

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 for the excitations we show that the system approaches a gapless, insulating phase upon increasing the...

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Bibliographic Details
Published inarXiv.org
Main Authors Cetoli, Alberto, Lundh, Emil
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 15.07.2011
Subjects
Fluids
Glass
Laser beams
Phase transitions
Quasicrystals
Superfluidity
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Summary: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 for the excitations we show that the system approaches a gapless, insulating phase upon increasing the potential, consistent with a Bose glass phase. The characteristics of the transition in terms of phase correlations, oscillatory modes, and superfluid fraction are discussed.
ISSN:2331-8422