Phonon instability with respect to soliton formation in two-dimensional dipolar Bose-Einstein condensates

The partially attractive character of the dipole-dipole interaction leads to phonon instability in dipolar Bose-Einstein condensates, which is followed by collapse in 3D geometries. We show that in 2D, the nature of the post-instability dynamics is fundamentally different, due to the stabilization o...

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Bibliographic Details
Published in:	Physical review letters Vol. 102; no. 5; p. 050401
Main Authors:	Nath, R, Pedri, P, Santos, L
Format:	Journal Article
Language:	English
Published:	United States 06-02-2009
Subjects:	BOSE-EINSTEIN CONDENSATION CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS DIPOLES GEOMETRY INSTABILITY PHONONS QUANTUM MECHANICS SOLITONS THREE-DIMENSIONAL CALCULATIONS TWO-DIMENSIONAL CALCULATIONS
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Summary:	The partially attractive character of the dipole-dipole interaction leads to phonon instability in dipolar Bose-Einstein condensates, which is followed by collapse in 3D geometries. We show that in 2D, the nature of the post-instability dynamics is fundamentally different, due to the stabilization of 2D solitons. As a result, a transient gas of attractive solitons is formed, and collapse may be avoided. In the presence of an harmonic trap, the post-instability dynamics is characterized by a transient pattern formation followed by the creation of stable 2D solitons. This dynamics should be observable in ongoing experiments, allowing for the creation of stable 2D solitons for the first time ever in quantum gases.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.102.050401