Universal dynamics of rogue waves in a quenched spinor bose condensate

• Verfasst von: Siovitz, Ido [VerfasserIn]
• Verfasst von: Lannig, Stefan [VerfasserIn]
• Verfasst von: Deller, Yannick [VerfasserIn]
• Verfasst von: Strobel, Helmut [VerfasserIn]
• Verfasst von: Oberthaler, Markus K. [VerfasserIn]
• Verfasst von: Gasenzer, Thomas [VerfasserIn]
• Titel: Universal dynamics of rogue waves in a quenched spinor bose condensate
• Verf.angabe: Ido Siovitz, Stefan Lannig, Yannick Deller, Helmut Strobel, Markus K. Oberthaler, and Thomas Gasenzer
• E-Jahr: 2023
• Jahr: 2 November 2023
• Umfang: 7 S.
• Illustrationen: Illustrationen
• Fussnoten: Gesehen am 22.02.2024
• Titel Quelle: Enthalten in: Physical review letters
• Ort Quelle: College Park, Md. : APS, 1958
• Jahr Quelle: 2023
• Band/Heft Quelle: 131(2023), 18, Artikel-ID 183402, Seite 1-7
• ISSN Quelle: 1079-7114
• DOI: doi:10.1103/PhysRevLett.131.183402
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 188142393X

Abstract

Isolated many-body systems far from equilibrium may exhibit scaling dynamics with universal exponents indicating the proximity of the time evolution to a nonthermal fixed point. We find universal dynamics connected with the occurrence of extreme wave excitations in the mutually coupled magnetic components of a spinor gas which propagate in an effectively random potential. The frequency of these rogue waves is affected by the time-varying spatial correlation length of the potential, giving rise to an additional exponent δc≃1/3 for temporal scaling, which is different from the exponent βV≃1/4 characterizing the scaling of the correlation length ℓV∼tβV in time. As a result of the caustics, i.e., focusing events, real-time instanton defects appear in the Larmor phase of the spin-1 system as vortices in space and time. The temporal correlations governing the instanton occurrence frequency scale as tδI. This suggests that the universality class of a nonthermal fixed point could be characterized by different, mutually related exponents defining the evolution in time and space, respectively. Our results have a strong relevance for understanding pattern coarsening from first principles and potential implications for dynamics ranging from the early Universe to geophysical dynamics and microphysics.