Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session E05: Atomic Bose-Einstein Condensates
2:00 PM–3:48 PM,
Tuesday, June 1, 2021
Chair: Cass Sackett, Virginia
Abstract: E05.00004 : Vortex states within expanding Bose-Einstein Condensates*
2:36 PM–2:48 PM
Live
Presenter:
Holly Alice Jess Middleton-Spencer
(Univ of Newcastle)
Authors:
Holly Alice Jess Middleton-Spencer
(Univ of Newcastle)
Carlo F Barenghi
(Univ of Newcastle)
Nick Parker
(Univ of Newcastle)
Luca Galantucci
(Univ of Newcastle)
Collaborations:
H. A. J. Middleton-Spencer, N. G. Parker, L. Galantucci, C. F. Barenghi
In this work we take a step back and study both how vortices affect the expansion of a condensate and how the expansion effects the vortices. We begin by considering a single vortex in harmonically trapped condensates of varying aspect ratios: we quantify the width and length of the vortex during the expansion and identify the change of the various contributions (interaction, compressible kinetic and incompressible kinetic) to the total energy of the expanding condensate. Then we move our attention to the reconnection of vortices within the condensate, a fundamental mechanism for the dynamics of the turbulence. We provide quantitative evidence that reconnections of simple vortex systems are effectively frozen in the early-time expansion of the condensate. This result confirms that the experimental images of an expanded turbulent condensates are snapshots of the previously evolving condensates.
*N.P., L.G. and C.F.B. acknowledge support by the Engineering and Physical Sciences Research Council (Grant No. EP/R005192/1).
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700