Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2010

Идентификатор DOI: 10.1103/PhysRevA.82.011601

Ключевые слова: Atom-atom interaction, Bloch oscillations, Bose-Einstein condensates, Bright solitons, Critical value, Driving field, Localized wave packets, Matter solitons, Optical lattices, Self-focusing, Self-trapping, Soliton formation, Wave-packet dynamics, Crystal lattices, Optical materials, Solitons, Statistical mechanics, Steam condensers, Atoms

Аннотация: We discuss a method for creating bright matter solitons by loading a Bose-Einstein condensate of atoms in a driven tilted optical lattice. It is shown that one can realize the self-focusing regime for the wave-packet dynamics by properly adjusting the phase of the driving field with respect to the phase of Bloch oscillations. If atom-atom interactions are larger than some critical value g(min), this self-focusing regime is followed by the formation of bright solitons. Increasing the interactions above another critical value g(max) makes this process unstable. Instead of soliton formation one now meets the phenomenon of incoherent self-trapping. In this regime a fraction of atoms is trapped in incoherent localized wave packets, while the remaining atoms spread ballistically.

Журнал: PHYSICAL REVIEW A

Выпуск журнала: Vol. 82, Is. 1

ISSN журнала: 10502947

Место издания: COLLEGE PK

Издатель: AMER PHYSICAL SOC

• Kolovsky Andrey R. (LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660036, Russia)

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