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Counterdiabatic vortex pump in spinor Bose-Einstein condensates

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Ollikainen, T., Masuda, S., Möttönen, M., & Nakahara, M. (2017). Counterdiabatic vortex pump in spinor Bose-Einstein condensates. Physical Review A, 95 (1), 013615. doi:10.1103/PhysRevA.95.013615
Published in
Physical Review A
Authors
Ollikainen, T. |
Masuda, S. |
Möttönen, Mikko |
Nakahara, M.
Date
2017
Discipline
Tietotekniikka
Copyright
© 2017 American Physical Society. Published in this repository with the kind permission of the publisher.

 
Topological phase imprinting is a well-established technique for deterministic vortex creation in spinor BoseEinstein 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. ...
Publisher
American Physical Society
ISSN Search the Publication Forum
2469-9926
Keywords
Bose-Einstein condensates topological phase imprinting vortex pumps alkali metals
DOI
https://doi.org/10.1103/PhysRevA.95.013615
URI

http://urn.fi/URN:NBN:fi:jyu-201702061362

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