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

B.C. Mulkerin, R.M.W. Bijnen, van, D.H.J. O'Dell, A.M. Martin, N.G. Parker

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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 antidipole, 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 modify the 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 corotation dynamics and the suppression of vortex annihilation.
Original languageEnglish
Article number170402
Number of pages5
JournalPhysical Review Letters
Issue number17
Publication statusPublished - 2013


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