Q-ball dynamics from atomic Bose?Einstein condensates

  title={Q-ball dynamics from atomic Bose?Einstein condensates},
  author={Kari Enqvist and Mikko Laine},
  journal={Journal of Cosmology and Astroparticle Physics},
  • K. Enqvist, M. Laine
  • Published 16 April 2003
  • Physics
  • Journal of Cosmology and Astroparticle Physics
Relativistic scalar field theories with a conserved global charge Q often possess (meta)stable spherically symmetric soliton solutions, called Q-balls. We elaborate on the perfect formal analogy which exists between Q-balls and spherically symmetric solitons in certain non-relativistic atomic Bose–Einstein condensates, for which the dominant interatomic interaction can be tuned attractive. In a harmonic trap, present in existing experiments, the Q-ball solution is modified in an essential way… 

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