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

2018/09/19 by S. Sabari, R. Kishor Kumar
Physics and Astronomy · #cond-mat.quant-gas

paper · pdf · doi:10.1140/epjd/e2018-80354-2

published as Eur. Phys. J. D 72, 48 (2018) · arXiv admin note: text overlap with arXiv:1101.2052 by other authors

arxiv created 2018/09/19 · arxiv updated 2018/09/21

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 the interaction of dynamically migrating vortex dipoles.

Citations

• Nonlinear Dynamics in a Trapped Atomic Bose--Einstein Condensate Induced by an Oscillating Gaussian Potential