Excitations of a vortex line in an elongated dipolar condensate

Au-Chen Lee, D. Baillie, R. N. Bisset, and P. B. Blakie
Phys. Rev. A 98, 063620 – Published 17 December 2018

Abstract

We characterize the properties of a vortex line in an elongated dipolar Bose–Einstein condensate. Increasing the strength of the dipole-dipole interactions (DDIs) relative to the short-ranged contact interactions we find that the system crosses over to a self-bound vortex droplet stabilized from collapse by quantum fluctuations. We calculate the quasiparticle excitation spectrum of the vortex state, which is important in characterizing the vortex response and assessing its stability. When the DDIs are sufficiently strong we find that the vortex is dynamically unstable to quadrupolar modes.

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  • Received 18 October 2018

DOI:https://doi.org/10.1103/PhysRevA.98.063620

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Au-Chen Lee1, D. Baillie1, R. N. Bisset2,3, and P. B. Blakie1

  • 1The Dodd-Walls Centre for Photonic and Quantum Technologies, Dunedin 9016, New Zealand and Department of Physics, University of Otago, Dunedin 9016, New Zealand
  • 2Institut für Theoretische Physik, Leibniz Universität Hannover, 30167 Hannover, Germany
  • 3INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, 38123 Povo, Italy

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Issue

Vol. 98, Iss. 6 — December 2018

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