Three-dimensional roton excitations and supersolid formation in Rydberg-excited Bose-Einstein condensates.
Phys Rev Lett
; 104(19): 195302, 2010 May 14.
Article
in En
| MEDLINE
| ID: mdl-20866972
ABSTRACT
We study the behavior of a Bose-Einstein condensate in which atoms are weakly coupled to a highly excited Rydberg state. Since the latter have very strong van der Waals interactions, this coupling induces effective, nonlocal interactions between the dressed ground state atoms, which, opposed to dipolar interactions, are isotropically repulsive. Yet, one finds partial attraction in momentum space, giving rise to a roton-maxon excitation spectrum and a transition to a supersolid state in three-dimensional condensates. A detailed analysis of decoherence and loss mechanisms suggests that these phenomena are observable with current experimental capabilities.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2010
Type:
Article
Affiliation country:
Germany