Parametric amplification of matter waves in dipolar spinor Bose-Einstein condensates

F. Deuretzbacher, G. Gebreyesus, O. Topic, M. Scherer, B. Lücke, W. Ertmer, J. Arlt, C. Klempt, and L. Santos
Phys. Rev. A 82, 053608 – Published 10 November 2010

Abstract

Spin-changing collisions may lead under proper conditions to the parametric amplification of matter waves in spinor Bose-Einstein condensates. Magnetic dipole-dipole interactions, although typically very weak in alkali-metal atoms, are shown to play a very relevant role in the amplification process. We show that these interactions may lead to a strong dependence of the amplification dynamics on the angle between the trap axis and the magnetic-field orientation. We analyze as well the important role played by magnetic-field gradients, which also modify strongly the amplification process. Magnetic-field gradients, hence, must be carefully controlled in future experiments, in order to observe clearly the effects of the dipolar interactions in the amplification dynamics.

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  • Received 12 May 2010

DOI:https://doi.org/10.1103/PhysRevA.82.053608

©2010 American Physical Society

Authors & Affiliations

F. Deuretzbacher1,*, G. Gebreyesus1, O. Topic2, M. Scherer2, B. Lücke2, W. Ertmer2, J. Arlt3, C. Klempt2, and L. Santos1

  • 1Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstr. 2, D-30167, Hannover, Germany
  • 2Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany
  • 3QUANTOP, Danish National Research Foundation Center for Quantum Optics, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark

  • *fdeuretz@itp.uni-hannover.de

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Vol. 82, Iss. 5 — November 2010

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