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Physical Review A

Vortex dipole in a trapped atomic Bose-Einstein condensate (7 pages)

Hui Zhai, Qi Zhou

Published Jan 1, 2004• 0 citations
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Vortex dipole in a trapped atomic Bose-Einstein condensate

Qi Zhou, Hui Zhai

We calculate the angular momentum and energy of a vortex dipole in a trapped atomic Bose-Einstein condensate. Fully analytic expressions are obtained. We apply the results to understand an interesting phenomenon in the MIT group experiment [Raman et al., Phys. Rev. Lett. 87, 210402 (2001)], an excellent agreement is achieved, and further experimental investigation is proposed to confirm this vortex dipole mechanism. We then suggest an effective generation and detection of vortex dipole for experimental realization. Application of the sum rule to calculate collective mode frequency splitting is also discussed.

arXiv:cond-mat/0410601•Physical Review A•Oct 20, 2004•34 citations

Controlled Generation and Manipulation of Vortex Dipoles in a Bose-Einstein Condensate

Tomohiko Aioi, Tsuyoshi Kadokura, T. Kishimoto +1 more

We propose methods to generate and manipulate vortex dipoles in an atomic Bose-Einstein condensate using Gaussian beams of red-or blue-detuned laser.Vortex dipoles with controlled velocities are shown to be created and launched by a red-detuned beam and by two blue-detuned beams.Critical beam velocities for the vortex nucleation are investigated.The launched vortex dipoles can be trapped, curved, accelerated, and decelerated by using Gaussian laser beams.Collisions between vortex dipoles are demonstrated.

arXiv:1106.1314•Physical Review X•Oct 17, 2011•61 citations
We calculate the angular momentum and energy of a vortex dipole in a trapped atomic Bose-Einstein condensate. Fully analytic expressions are obtained. We apply the results to understand an interesting phenomenon in the MIT group experiment [Raman et al., Phys. Rev. Lett. 87, 210402 (2001)], an excellent agreement is achieved, and further experimental investigation is proposed to confirm this vortex dipole mechanism. We then suggest an effective generation and detection of vortex dipole for experimental realization. Application of the sum rule to calculate collective mode frequency splitting is also discussed.
We propose methods to generate and manipulate vortex dipoles in an atomic Bose-Einstein condensate using Gaussian beams of red-or blue-detuned laser.Vortex dipoles with controlled velocities are shown to be created and launched by a red-detuned beam and by two blue-detuned beams.Critical beam velocities for the vortex nucleation are investigated.The launched vortex dipoles can be trapped, curved, accelerated, and decelerated by using Gaussian laser beams.Collisions between vortex dipoles are demonstrated.