E141-02 - Forschungsbereich Atom Physics and Quantum Optics
-
Journal:
Physical Review Research (PRResearch)
-
Date (published):
6-May-2022
-
Number of Pages:
12
-
Publisher:
American Physical Society
-
Peer reviewed:
Yes
-
Keywords:
cold atoms; many-body systems; vortex flows; black holes
en
Abstract:
We investigate wave-vortex interaction emerging from an expanding compact vortex cluster in a two-dimensional Bose-Einstein condensate. We adapt techniques developed for compact gravitational objects to derive the characteristic modes of the wave-vortex interaction perturbatively around an effective vortex flow field. We demonstrate the existence of orbits or sound rings, in analogy to gravitational light rings, and compute the characteristic spectrum for the out-of-equilibrium vortex cluster. The spectrum obtained from numerical simulations of a stochastic Gross-Pitaevskii equation exhibiting an expanding vortex cluster is in excellent agreement with analytical predictions. Our findings are relevant for two-dimensional quantum turbulence, the semiclassical limit around fluid flows, and rotating compact objects exhibiting discrete circulation.
en
Project title:
Analog Quantum Simulators: ESQ Discovery Schmiedmayer Huber (Österr. Akademie der Wissenschaften) Marie Sklodowska-Curie Cofunding of the fellow ship programme of the ESQ (Erwin Schrödinger Quantum Science Programme at the ÖAW: 801110 — ESQ (Österr. Akademie der Wissenschaften)