Regensburg 2019 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

DY: Fachverband Dynamik und Statistische Physik

DY 42: Focus: Many-Body Quantum Chaos

DY 42.1: Invited Talk

Thursday, April 4, 2019, 09:30–10:00, H20

Quantum dynamics in strongly correlated one-dimensional Bose gases — •Hanns-Christoph Nägerl — Institut für Experimentalphysik, Universität Innsbruck, A-6020 Innsbruck

We have experimentally studied the dynamics of strongly correlated bosonic quantum gases confined to a one-dimensional (1D) geometry, with focus on two different model systems. We have realized 1D Hubbard chains and have studied correlated tunneling dynamics when the many-body system is suddenly exposed to a strong force. This has allowed us to observe how interacting quantum particles prepared in the Mott-insulating phase tunnel through multiple wells of the lattice potential in a situation where a single particle cannot move at all [1]. Our studies further comprise the coherent evolution of an interacting superfluid that exhibits Bloch-oscillations modulated by interaction-driven collapse and revival dynamics [2]. In a certain parameter regime, the transition to quantum chaotic behavior can be observed. The second system of interest constitutes a uniform Luttinger liquid with highly tunable interactions. We have probed the dynamics of a strongly coupled impurity atom injected into the liquid and have found an intriguing Bloch-oscillation type motion induced in the correlated system in the absence of an imprinted lattice structure [3].

[1] F. Meinert et al., Science 344, 1259 (2014). [2] F. Meinert et al., Phys. Rev. Lett. 112, 193003 (2014). [3] F. Meinert et al., Science 356, 945 (2017).