Journal of Low Temperature Physics

, Volume 180, Issue 1–2, pp 133–143 | Cite as

Vortex Reconnections in Anisotropic Trapped Three-Dimensional Bose–Einstein Condensates

  • T. Wells
  • A. U. J. Lode
  • V. S. Bagnato
  • M. C. TsatsosEmail author


Quantum vortex reconnections can be considered as a fundamental unit of interaction in complex turbulent quantum gases. Understanding the dynamics of single vortex reconnections as elementary events is an essential precursor to the explanation of the emergent properties of turbulent quantum gases. It is thought that a lone pair of quantum vortex lines will inevitably interact given a sufficiently long time. This paper investigates aspects of reconnections of quantum vortex pairs imprinted in a Bose–Einstein condensate with 101 bosons held in an anisotropic three-dimensional trap using an exact many-body treatment. In particular, the impact of the interaction strength and the trap anisotropy in the reconnection time is studied. It is found that interaction strength has no effect on reconnection time over short time scales and that the trap anisotropy can cause the edge of the condensate to interfere with the reconnection process. It is also found that the initially coherent system fragments very slowly, even for a relatively large interaction strength, and therefore the system tends to stay condensed during the reconnections.


Ultracold bosons Many-body MCTDHB Quantum fluids Quantized vortices 



The authors wish to thank O.E. Alon for useful comments and FAPESP for financial support. A.U.J.L. acknowledges financial support by the Swiss SNF and the NCCR Quantum Science and Technology. T.W. thanks DAAD for financial support. Computational time in the Hermit Cray computer of the High Performance Computing Center in Stuttgart is also gratefully acknowledged.


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • T. Wells
    • 1
    • 2
  • A. U. J. Lode
    • 3
  • V. S. Bagnato
    • 2
  • M. C. Tsatsos
    • 2
    Email author
  1. 1.Department of Applied Mathematics and Theoretical PhysicsUniversity of CambridgeCambridgeUK
  2. 2.Instituto de Física de São CarlosUniversidade de São PauloSão CarlosBrazil
  3. 3.Department of PhysicsUniversity of BaselBaselSwitzerland

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