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Anisotropic and long-range vortex interactions in two-dimensional dipolar Bose gases

Lookup NU author(s): Professor Nick ParkerORCiD

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).

Abstract

We perform a theoretical study into how dipole-dipole interactions modify the properties of superfluid vortices within the context of a two-dimensional atomic Bose gas of co-oriented dipoles. The reduced density at a vortex acts like a giant anti-dipole, changing the density profile and generating an effective dipolar potential centred at the vortex core whose most slowly decaying terms go as $1/\rho^2$ and $\ln(\rho)/\rho^3$. These effects modifythe vortex-vortex interaction which, in particular, becomes anisotropic for dipoles polarized in the plane. Striking modifications to vortex-vortex dynamics are demonstrated, i.e. anisotropic co-rotation dynamics and thesuppression of vortex annihilation.

Publication metadata

Author(s): Mulkerin BC, van Bijnen RMW, O'Dell DHJ, Martin AM, Parker NG

Publication type: Letter

Publication status: Published

Journal: Physical Review Letters

Year: 2013

Volume: 111

Issue: 17

ISSN (print): 0031-9007

ISSN (electronic): 1079-7114

URL: http://link.aps.org/doi/10.1103/PhysRevLett.111.170402

DOI: 10.1103/PhysRevLett.111.170402

Notes: publisher: American Physical Society

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