Journal Article

GSI-2022-00254

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Dynamics of a vortex dipole in a holographic superfluid

Ewerz, C.GSI* ; Samberg, A.GSI* ; Wittmer, P. (Corresponding author)GSI*

2021
SISSA [Trieste]

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Please use a persistent id in citations: doi:10.1007/JHEP11(2021)199  doi:10.15120/GSI-2022-00254

Report No.: arXiv:2012.08716

Abstract: We use holography to investigate the dynamics of a vortex-anti-vortex dipole in a strongly coupled superfluid in 2+1 dimensions. The system is evaluated in numerical real-time simulations in order to study the evolution of the vortices as they approach and eventually annihilate each other. A tracking algorithm with sub-plaquette resolution is introduced which permits a high-precision determination of the vortex trajectories. With the increased precision of the trajectories it becomes possible to directly compute the vortex velocities and accelerations. We find that in the holographic superfluid the vortices follow universal trajectories independent of their initial separation, indicating that a vortex-anti-vortex pair is fully characterized by its separation. Subtle non-universal effects in the vortex motion at early times of the evolution can be fully attributed to artifacts due to the numerical initialization of the vortices. We also study the dependence of the dynamics on the temperature of the superfluid.

Keyword(s): space-time: dimension: 3 ; vortex ; superfluid ; trajectory ; holography ; dipole ; acceleration ; velocity ; numerical calculations ; AdS-CFT Correspondence ; Gauge-gravity correspondence ; Holography and condensed matter physics (AdS/CMT)

Note: Open Access, Article funded by SCOAP3.

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Contributing Institute(s):

1. ExtreMe Matter Institute, EMMI (EXM)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)
2. SUC-GSI-Heidelberg - Strategic university cooperation GSI-U Heidelberg (SUC-GSI-HE) (SUC-GSI-HE)

Experiment(s):

1. no experiment theory work (POF3; theory)

Appears in the scientific report 2021

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Database coverage:
; ; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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