Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2008

Идентификатор DOI: 10.1140/epjd/e2008-00060-0

Аннотация: We consider a Bose-Einstein condensate of ultracold atoms loaded into a square optical lattice and subject to a static force. For vanishing atom-atom interactions the atoms perform periodic Bloch oscillations for arbitrary direction of the force. We study stability of these oscillations for non-vanishing interactions, which is shown to depend on an alignment of the force vector with respect to the lattice crystallographic axes. If the force is aligned along any of the axes, the mean field approach can be used to identify the stability conditions. On the contrary, for a misaligned force one has to employ the microscopic approach, which predicts periodic modulation of Bloch oscillations in the limit of a large forcing.

Журнал: EUROPEAN PHYSICAL JOURNAL D

Выпуск журнала: Vol. 47, Is. 3

Номера страниц: 421-425

ISSN журнала: 14346060

Место издания: NEW YORK

Издатель: SPRINGER

• Chung M.-C. (Max-Planck-Institut fur Physik Komplexer Systeme)
• Kolovsky A.R. (Siberian Federal University)

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