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    Bogoliubov depletion of the fragmented condensate in the bosonic flux ladder

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    DOI:
    10.1103/PhysRevA.95.033622
    URI (for links/citations):
    https://journals.aps.org/pra/abstract/10.1103/PhysRevA.95.033622
    http://elib.sfu-kras.ru/handle/2311/70239
    Author:
    Andrey R. Kolovsky
    Corporate Contributor:
    Институт инженерной физики и радиоэлектроники
    Кафедра теоретической физики и волновых явлений
    Date:
    2017-03
    Journal Name:
    PHYSICAL REVIEW A
    Journal Quartile in Scopus:
    Q1
    Journal Quartile in Web of Science:
    Q1
    Bibliographic Citation:
    Andrey R. Kolovsky. Bogoliubov depletion of the fragmented condensate in the bosonic flux ladder [Текст] / Andrey R. Kolovsky // PHYSICAL REVIEW A. — 2017. — Т. 95. — С. 033622-p1-033622-p8
    Abstract:
    We theoretically analyze the ground state of weakly interacting bosons in the flux ladder—the system that has been recently realized by means of ultracold atoms in the specially designed optical lattice [M. Atala, M. Aidelsburger, M. Lohse, J. T. Barreiro, B. Paredes, and I. Bloch, Nat. Phys. 10, 588 (2014)]. It is argued that, for the system parameters corresponding to two degenerate minima in the Bloch dispersion relation, the ground state is a fragmented condensate. We study the Bogoliubov depletion of this condensate and discuss the role of boundary conditions.
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