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Thomas Pohl

Three-Dimensional Roton Excitations and Supersolid Formation in Rydberg-Excited Bose-Einstein Condensates

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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.

Original languageEnglish
Article number195302
JournalPhysical Review Letters
Volume104
Issue19
Number of pages4
ISSN0031-9007
DOIs
Publication statusPublished - 14 May 2010
Externally publishedYes

    Research areas

  • HELIUM, SUPERFLUID, CRYSTAL, HE-4

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