1512.07924v2-Accepted.pdf (567.18 kB)
Superfluid flow past an obstacle in annular Bose–Einstein condensates
journal contribution
posted on 2023-06-09, 04:54 authored by M Syafwan, P Kevrekidis, A Paris-Mandoki, I Lesanovsky, Peter KruegerPeter Krueger, L Hackermüller, H SusantoWe investigate the flow of a one-dimensional nonlinear Schrödinger model with periodic boundary conditions past an obstacle, motivated by recent experiments with Bose–Einstein condensates in ring traps. Above certain rotation velocities, localized solutions with a nontrivial phase profile appear. In striking difference from the infinite domain, in this case there are many critical velocities. At each critical velocity, the steady flow solutions disappear in a saddle-center bifurcation. These interconnected branches of the bifurcation diagram lead to additions of circulation quanta to the phase of the associated solution. This, in turn, relates to the manifestation of persistent current in numerous recent experimental and theoretical works, the connections to which we touch upon. The complex dynamics of the identified waveforms and the instability of unstable solution branches are demonstrated.
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Publication status
- Published
File Version
- Accepted version
Journal
Journal of Physics B: Atomic, Molecular and Optical PhysicsISSN
0953-4075Publisher
Institute of PhysicsExternal DOI
Issue
23Volume
49Page range
5301Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Atomic, Molecular and Optical Physics Research Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-01-25First Open Access (FOA) Date
2017-11-05First Compliant Deposit (FCD) Date
2017-01-24Usage metrics
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