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arXiv · 1209.1053

Revealing the Condensate and Non-Condensate Distributions in the Inhomogeneous Bose-Hubbard Model

Ushnish Ray·David M. Ceperley
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Abstract

We calculate the condensate fraction and the condensate and non-condensate spatial and momentum distribution of the Bose-Hubbard model in a trap. From our results, it is evident that using approximate distributions can lead to erroneous experimental estimates of the condensate. Strong interactions cause the condensate to develop pedestal-like structures around the central peak that can be mistaken as non-condensate atoms. Near the transition temperature, the peak itself can include a significant non-condensate component. Using distributions generated from QMC simulations, experiments can map their measurements for higher accuracy in identifying phase transitions and temperature.

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Ushnish Ray, David M. Ceperley. 2012-09-05. Revealing the Condensate and Non-Condensate Distributions in the Inhomogeneous Bose-Hubbard Model. https://doi.org/10.1103/physreva.87.051603

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