DOUBLE FEATURE M.Sc. Julian Wienand and Dr. Miguel Bello

M.Sc. Julian Wienand talks about: “Emergence of fluctuating hydrodynamics in chaotic quantum systems”

A fundamental principle of chaotic quantum dynamics is that local subsystems eventually approach a thermal equilibrium state. Large subsystems thermalize slower: their approach to equilibrium is limited by the hydrodynamic build-up of large-scale fluctuations. We perform large-scale quantum simulations that monitor particle-number fluctuations in hard-core boson ladders, contrasting systems with ballistic and chaotic dynamics. Our results suggest that large-scale fluctuations of isolated chaotic quantum systems display emergent hydrodynamic behavior. We find excellent agreement between our results and the framework of fluctuating hydrodynamics, which allows us to accurately extract linear-response diffusion constants from out-of-equilibrium fluctuation growth.

Dr. Miguel Bello talks about: “Quantum optics in exotic media: chances and challenges”

Today, the variety of platforms on which we can test, control, and exploit the quantum properties of matter has expanded enormously, giving us the opportunity to explore new regimes and discover new phenomena. In this talk, I will introduce two novel research directions that take advantage of these developments: topological quantum optics and matter-wave quantum optics.