SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 63: Ultra-cold Plasmas and Rydberg Systems II (joint session A/Q)
Q 63.6: Vortrag
Freitag, 10. März 2023, 12:30–12:45, F107
Thermal suppression of demixing dynamics in a binary condensate — •Vijay Singh1,2, Luigi Amico1, and Ludwig Mathey2 — 1Quantum Research Centre, Technology Innovation Institute, Abu Dhabi, UAE — 2Zentrum für Optische Quantentechnologien and Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany
We investigate the demixing dynamics in a binary two-dimensional (2D) Bose superfluid using classical-field dynamics. By quenching the interspecies interaction parameter, we identify a strong and weak segregation regime depending on the the system temperature and the value of quench parameter. In the strong segregation regime our results are in agreement with the inertial hydrodynamic domain growth law of binary fluids and a Porod scaling law for the structure factor at zero temperature is found. In the weak segregation regime thermal fluctuations modify both the domain growth law and the Porod tail of structure factor. Near the superfluid transition temperature the scaling dynamics approaches the diffusive growth law of a 2D conserved field. We then analyze the demixing dynamics in a box cloud. For sufficiently small clouds and low quench we find a distinctive dynamics dictated by the boundary condition. Otherwise, the dynamics results to be qualitatively similar to the one observed for systems with periodic boundary conditions.