Physics Colloquium / Prof. Peter Schlagheck: Quantum simulation of chaos

Date

Apr 16, 2024

Time

2:50 PM - 4:20 PM

Language

en

Main Topic

Willkommen

Other Topics

Willkommen

Description

Event announcement as pdf-Download (https://tu-dresden.de/mn/physik/ressourcen/dateien/physikalisches-kolloquium/2024-04-16-Phys_Kolloq-Schlagheck-SoSe2024.pdf).

Abstract: The second quantum revolution has given birth to a number of novel tools and techniques that are about to have some effect on our everyday life in the near future. Among those new tools figures quantum simulation, i.e., the possibility to better understand the quantum dynamics in a complicated system (e.g. in a biochemical context) by emulating the essential ingredients of that system within a different quantum system that is under very good experimental control. State-of-the-art platforms for quantum simulations, using photons, trapped ions, ultracold atoms, or superconducting qubits, share the common feature that they are very complex and involve many degrees of freedom. Quite unsurprisingly, pioneering studies with such quantum simulation platforms were therefore focused on obtaining a better understanding of the generic properties of complex quantum many-body systems and their relation with the notions of integrability or chaos. In my talk, I will address these quantum signatures of chaos in the specific context of ultracold bosonic atoms confined within optical lattices, theoretically described by Bose-Hubbard systems which feature a well-defined classical counterpart. I will specifically focus on deviations from the quantum-classical correspondence in this context, owing to many-body quantum interference effects. Those deviations can be rather subtle, if induced by the presence of discrete symmetries or time-reversal invariance, or rather important, as exemplified by scars, i.e., eigenstates that are strongly localized in phase space and thereby defy thermalisation despite global chaos. Being aware of these generic phenomena will be of key importance for the conception and handling of efficient quantum simulators.

Short bio: 1996-1999: PhD in physics at TU München / 1999-2001: Postdoc at Université Paris Sud / 2001- 2008: Assistant position (including habilitation) at Universität Regensburg / 2008-2009: Guest professor at University of Lund (Sweden) / since 2009: Faculty member at Université de Liège.

Links

• Termindetails auf den Webseiten der TU Dresden (https://tu-dresden.de)

Last modified: Apr 16, 2024, 7:36:55 AM