Goldstone modes and bifurcations in phase-separated binary condensates at finite temperature

Roy, Arko and Gautam, S and Angom, D (2014) Goldstone modes and bifurcations in phase-separated binary condensates at finite temperature. In: PHYSICAL REVIEW A, 89 (1).

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Abstract

We show that the third Goldstone mode, which emerges in binary condensates at phase separation, persists to higher interspecies interaction for density profiles where one component is surrounded on both sides by the other component. This is not the case with symmetry-broken density profiles where one species is entirely to the left and the other is entirely to the right. We, then, use Hartree-Fock-Bogoliubov theory with Popov approximation to examine the mode evolution at T not equal 0 and demonstrate the existence of mode bifurcation near the critical temperature. The Kohn mode, however, exhibits deviation from the natural frequency at finite temperatures after the phase separation. This is due to the exclusion of the noncondensate atoms in the dynamics.

Item Type:	Journal Article
Publication:	PHYSICAL REVIEW A
Publisher:	AMER PHYSICAL SOC
Additional Information:	Copyright for this article belongs to the AMER PHYSICAL SOC, USA
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	28 Apr 2014 05:43
Last Modified:	28 Apr 2014 05:43
URI:	http://eprints.iisc.ac.in/id/eprint/48921

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