Bonn 2025 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 19: Ultracold Matter (Bosons) III (joint session Q/A)
A 19.4: Vortrag
Mittwoch, 12. März 2025, 15:15–15:30, WP-HS
Propagation of two-particle correlations across the chaotic phase for interacting bosons — •Óscar Dueñas Sánchez1,2 and Alberto Rodríguez1,2 — 1Departamento de Física Fundamental, Universidad de Salamanca, E-37008 Salamanca, Spain — 2Instituto Universitario de Física Fundamental y Matemáticas (IUFFyM), Universidad de Salamanca, E-37008 Salamanca, Spain
We study the dynamical manifestation of the chaotic phase in the time-dependent propagation of experimentally relevant two-particle correlations for one-dimensional interacting bosons by means of a conveniently defined two-particle correlation transport distance ℓ. Our results show that the chaotic phase induces the emergence of an effective diffusive regime in the asymptotic temporal growth of ℓ, characterized by an interaction dependent diffusion coefficient, which we estimate [1]. We investigate the origin of such behaviour by analysing the spatial and temporal evolution of two-particle correlations, where we see a clear correspondence between a general change in their profile and the emergence of the diffusive regime.
2mm
[1] O. Dueñas, D. Peña and A. Rodríguez, arXiv:2410.10571
Keywords: Bose-Hubbard model; Quantum chaos; Many-body dynamics