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Effect of an oscillating Gaussian obstacle in a dipolar Bose-Einstein condensate

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Abstract

We study the dynamics of vortex dipoles in erbium (168Er) and dysprosium (164Dy) dipolar Bose-Einstein condensates (BECs) by applying an oscillating blue-detuned laser (Gaussian obstacle). For observing vortex dipoles, we solve a nonlocal Gross-Pitaevskii (GP) equation in quasi two-dimensions in real-time. We calculate the critical velocity for the nucleation of vortex dipoles in dipolar BECs with respect to dipolar interaction strengths. We also show the dynamics of the group of vortex dipoles and rarefaction pulses in dipolar BECs. In the dipolar BECs with Gaussian obstacle, we observe rarefaction pulses due to interaction of dynamically migrating vortex dipoles.

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Authors and Affiliations

  1. Department of Physics, Bharathidasan University, Palkalaiperur Campus, Tiruchirappalli, 620024, India

    Subramaniyan Sabari

  2. Department of Physics, Savitribai Phule Pune University, Pune, 411007, Maharashtra, India

    Subramaniyan Sabari

  3. Instituto de Física, Universidade de São Paulo, 05508-090, São Paulo, Brazil

    R. Kishor Kumar

Authors
  1. Subramaniyan Sabari
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  2. R. Kishor Kumar
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Correspondence to Subramaniyan Sabari or R. Kishor Kumar.

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Sabari, S., Kumar, R.K. Effect of an oscillating Gaussian obstacle in a dipolar Bose-Einstein condensate. Eur. Phys. J. D 72, 48 (2018). https://doi.org/10.1140/epjd/e2018-80354-2

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  • DOI: https://doi.org/10.1140/epjd/e2018-80354-2

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