Publication Date:
2015-02-04
Description:
Author(s): Li-Chung Ha, Logan W. Clark, Colin V. Parker, Brandon M. Anderson, and Cheng Chin We present experimental evidence showing that an interacting Bose condensate in a shaken optical lattice develops a roton-maxon excitation spectrum, a feature normally associated with superfluid helium. The roton-maxon feature originates from the double-well dispersion in the shaken lattice, and can... [Phys. Rev. Lett. 114, 055301] Published Tue Feb 03, 2015
Keywords:
Condensed Matter: Structure, etc.
Print ISSN:
0031-9007
Electronic ISSN:
1079-7114
Topics:
Physics
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