Тип публикации: статья из журнала
Год издания: 2017
Идентификатор DOI: 10.1103/PhysRevA.95.033622
Ключевые слова: light induced gratings, pulse propagation, Raman gain
Аннотация: 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)1745-247310.1038/nphys2Показать полностью998]. 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. © 2017 American Physical Society.
Журнал: Physical Review A - Atomic, Molecular, and Optical Physics
Выпуск журнала: Vol. 95, Is. 3