Stability of Bose-Einstein condensates in a Kronig-Penney potential
نویسندگان
چکیده
منابع مشابه
Landau and Dynamical Instabilities of Bose-Einstein Condensates with Superfluid Flow in a Kronig-Penney Potential
We study the elementary excitations of Bose-Einstein condensates in a onedimensional periodic potential and discuss the stability of superfluid flow based on the Kronig-Penney model. We analytically solve the Bogoliubov equations and calculate the excitation spectrum. The Landau and dynamical instabilities occur in the first condensate band when the superfluid velocity exceeds certain critical ...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2007
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.75.033612