Schmiedmayer, H.-J. (2023, August 1). Generalized Hydrodynamics and the emergence of fermionic signatures in bosonic 1d systems [Presentation]. Chinesische Akademie der Wissenschaften, Shanghai, China.
E141-02 - Forschungsbereich Atom Physics and Quantum Optics
-
Date (published):
1-Aug-2023
-
Event name:
Chinesische Akademie der Wissenschaften
en
Event date:
27-Jul-2023 - 9-Aug-2023
-
Event place:
Shanghai, China
-
Keywords:
Generalized Hydro Dynamics
en
Abstract:
Generalized Hydro Dynamics (GHD) is a novel, very powerful tool to describe 1d systems. After a very brief introduction, I will first present a way to extend GHD to the dimensional cross over regime [1] and highlight the experimental tests of standard and extended GHD. In the second part of my talk, I will highlight how GHD can give us a much-improved understanding of the excitations and their decay/dephasing in a 1d Bose gas, and thereby highlighting the relationship between many-body interactions and dimensionality. In our experiments we prepare a single mode of excitations and watch it decay. We find that the decay of the excitations is perfectly described with GHD and 1D behaviour can extend deep into the three-dimensional (3D) crossover. Our observations demonstrate that the fundamental excitations are not phonons but are rapidities assuming fermionic statistics,despite the gas being purely bosonic [2]. The rapid damping of phonons can 1d can be understood as the dephasing the rapidities.
en
Additional information:
Generalized Hydro Dynamics (GHD) is a novel, very powerful tool to describe 1d systems. After a very brief
introduction, I will first present a way to extend GHD to the dimensional cross over regime [1] and highlight the experimental tests of standard and extended GHD. In the second part of my talk, I will highlight how GHD can give us a much-improved understanding of the excitations and their decay/dephasing in a 1d Bose gas, and thereby highlighting the relationship between many-body interactions and dimensionality. In our experiments we prepare a single mode of excitations and watch it decay. We find that the decay of the excitations is perfectly described with GHD and 1D behaviour can extend deep into the three-dimensional (3D) crossover. Our observations demonstrate that the fundamental excitations are not phonons but are rapidities assuming fermionic statistics, despite the gas being purely bosonic [2]. The rapid damping of phonons can 1d can be understood as the dephasing the rapidities.