The European Physical Journal D

, Volume 65, Issue 1–2, pp 19–24 | Cite as

Mean field effects on the scattered atoms in condensate collisions

  • P. Deuar
  • P. Ziń
  • J. Chwedeńczuk
  • M. Trippenbach
Regular Article Bose-Einstein condensates

Abstract

We consider the collision of two Bose Einstein condensates at supersonic velocities and focus on the halo of scattered atoms. This halo is the most important feature for experiments and is also an excellent testing ground for various theoretical approaches. In this study we find that the typical reduced Bogoliubov description, commonly used, is often not accurate in the region of parameters where experiments are performed. Surprisingly, besides the halo pair creation terms, one should take into account the evolving mean field of the remaining condensate and on-condensate pair creation. We present examples where the difference is clearly seen, and where the reduced description still holds. We also demostrate how to investigate separately the effects of various physical processes that influence the properties of the halo.

Keywords

Pair Production Pair Creation Thomas Fermi Scattered Atom Recoil Velocity 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • P. Deuar
    • 1
  • P. Ziń
    • 2
  • J. Chwedeńczuk
    • 3
  • M. Trippenbach
    • 3
  1. 1.Institute of Physics, Polish Academy of SciencesWarsawPoland
  2. 2.The Andrzej Sołtan Institute for Nuclear StudiesWarsawPoland
  3. 3.Institute of Theoretical Physics, Physics Department, University of WarsawWarsawPoland

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