Non-analytic vortex core and non-linear vortex flow in bosonic superfluids
1 The Racah Institute of Physics, The Hebrew University of Jerusalem - 91904, Israel
2 Physics Department, Columbia University - New York, NY 10027, USA
Received: 1 October 2015
Accepted: 31 October 2015
We analyze the disorder limited motion of quantum vortices in a two-dimensional bosonic superfluid with a large healing length. It is shown that the excitations of low-energy degrees of freedom associated with the non-analytic reconstruction of the vortex core (Ann. Phys., 346 (2014) 195) determine strong non-linear effects in the vortex transport at velocities much smaller than Landau's critical velocity. Experiments are suggested to verify our predictions.
PACS: 67.10.-j – Quantum fluids: general properties / 67.10.Jn – Transport properties and hydrodynamics / 67.85.-d – Ultracold gases, trapped gases
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