Nonequilibrium Dynamics and Superfluid Ring Excitations in Binary Bose-Einstein Condensates

K. M. Mertes, J. W. Merrill, R. Carretero-González, D. J. Frantzeskakis, P. G. Kevrekidis, and D. S. Hall
Phys. Rev. Lett. 99, 190402 – Published 5 November 2007
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Abstract

We revisit a classic study [D. S. Hall et al., Phys. Rev. Lett. 81, 1539 (1998)] of interpenetrating Bose-Einstein condensates in the hyperfine states |F=1,mf=1|1 and |F=2,mf=+1|2 of Rb87 and observe striking new nonequilibrium component separation dynamics in the form of oscillating ringlike structures. The process of component separation is not significantly damped, a finding that also contrasts sharply with earlier experimental work, allowing a clean first look at a collective excitation of a binary superfluid. We further demonstrate extraordinary quantitative agreement between theoretical and experimental results using a multicomponent mean-field model with key additional features: the inclusion of atomic losses and the careful characterization of trap potentials (at the level of a fraction of a percent).

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  • Received 9 July 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.190402

©2007 American Physical Society

Authors & Affiliations

K. M. Mertes1,*, J. W. Merrill1,†, R. Carretero-González2, D. J. Frantzeskakis3, P. G. Kevrekidis4, and D. S. Hall1

  • 1Department of Physics, Amherst College, Amherst, Massachusetts 01002-5000, USA
  • 2Nonlinear Dynamical Systems Group, Department of Mathematics and Statistics, and Computational Science Research Center, San Diego State University, San Diego, California 92182-7720, USA
  • 3Department of Physics, University of Athens, Panepistimiopolis, Zografos, Athens 157 84, Greece
  • 4Department of Mathematics and Statistics, University of Massachusetts, Amherst, Massachusetts 01003-4515, USA

  • *Current address: Los Alamos National Laboratory, MS-J567, Los Alamos, NM 87545, USA.
  • Current address: Department of Physics, Yale University, New Haven, CT 06520-8120, USA.

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Issue

Vol. 99, Iss. 19 — 9 November 2007

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Heating up of Superconductors
January 27, 2017

This collection marks the 30th anniversary of the discovery of high-temperature superconductors. The papers selected highlight some of the advances that have been made to date, both in understanding why these compounds behave in the way they do, and in utilizing them in applications. The papers included in the collection have been made free to read.

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