Unstable Avoided Crossing in Coupled Spinor Condensates

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Unstable Avoided Crossing in Coupled Spinor Condensates

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Title: Unstable Avoided Crossing in Coupled Spinor Condensates
Author: Bernier, Nathan R.; Dalla Torre, Emanuele; Demler, Eugene A.

Note: Order does not necessarily reflect citation order of authors.

Citation: Bernier, Nathan R., Emanuele G. Dalla Torre, and Eugene Demler. 2014. “Unstable Avoided Crossing in Coupled Spinor Condensates.” Physical Review Letters 113 (6) (August). doi:10.1103/physrevlett.113.065303.
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Abstract: We consider the dynamics of a Bose-Einstein condensate with two internal states, coupled through a coherent drive. We focus on a specific quench protocol, in which the sign of the coupling field is suddenly changed. At a mean-field level, the system is transferred from a minimum to a maximum of the coupling energy and can remain dynamically stable, in spite of the development of negative-frequency modes. In the presence of a nonzero detuning between the two states, the “charge” and “spin” modes couple, giving rise to an unstable avoided crossing. This phenomenon is generic to systems with two dispersing modes away from equilibrium and constitutes an example of class-Io nonequilibrium pattern formation in quantum systems.
Published Version: 10.1103/PhysRevLett.113.065303
Other Sources: http://arxiv.org/pdf/1402.4487v2.pdf
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:22856733
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