Counterdiabatic vortex pump in spinor Bose-Einstein condensates

T. Ollikainen, S. Masuda, M. Möttönen, and M. Nakahara
Phys. Rev. A 95, 013615 – Published 17 January 2017

Abstract

Topological phase imprinting is a well-established technique for deterministic vortex creation in spinor Bose-Einstein condensates of alkali-metal atoms. It was recently shown that counterdiabatic quantum control may accelerate vortex creation in comparison to the standard adiabatic protocol and suppress the atom loss due to nonadiabatic transitions. Here we apply this technique, assisted by an optical plug, for vortex pumping to theoretically show that sequential phase imprinting up to 20 cycles generates a vortex with a very large winding number. Our method significantly increases the fidelity of the pump for rapid pumping compared to the case without the counterdiabatic control, leading to the highest angular momentum per particle reported to date for the vortex pump. Our studies are based on numerical integration of the three-dimensional multicomponent Gross-Pitaevskii equation, which conveniently yields the density profiles, phase profiles, angular momentum, and other physically important quantities of the spin-1 system. Our results motivate the experimental realization of the vortex pump and studies of the rich physics it involves.

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  • Received 14 October 2016

DOI:https://doi.org/10.1103/PhysRevA.95.013615

©2017 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

T. Ollikainen1, S. Masuda1, M. Möttönen1,2, and M. Nakahara1,3

  • 1QCD Labs, COMP Centre of Excellence, Department of Applied Physics, Aalto University, P.O. Box 13500, FI-00076 Aalto, Finland
  • 2University of Jyväskylä, Department of Mathematical Information Technology, P.O. Box 35, FI-40014 University of Jyväskylä, Finland
  • 3Research Center for Quantum Computing and Department of Physics, Kinki University, Higashi-Osaka, 577-8502, Japan

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Issue

Vol. 95, Iss. 1 — January 2017

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