Illustration
​Schematic: Local time-periodic driving in a quantum gas. 
​Image credit: A. Widera, Kaiserslautern​

General Physics Colloquium by Sebastian Eggert

​Speaker: Sebastian Eggert, Technische Universität​, Kaiserslautern, Germany
Title of talk: Time-periodic driving: beyond Floquet engineering

Abstract:

Time periodic driving in quantum many body systems has recently been of great theoretical and experimental interest in order to engineer interesting tailor made interacting models with additional tunability and gauge fields, which gives rise to new quantum states with rich phase diagrams. The effective Hamiltonians are typically based on an high frequency approximation and an expansion in terms of Bessel functions. However, at lower frequencies which are comparable to the band width dramatic resonance effects beyond the effective description can be observed, as we recently demonstrated for locally driven models. In this talk I will give a short review of Floquet engineering before addressing the interesting resonance effects at lower frequencies which require a detailed analytical and numerical solution of the full Floquet many body solution for selected low dimensional models.​
​Coffee will be served outside PJ lecture hall before the lecture at 14.45.​ The colloquium starts at 15.15.
Category Colloquium
Location: PJ, lecture hall, Fysikgården 2B, Fysik Origo
Starts: 21 February, 2019, 15:15
Ends: 21 February, 2019, 16:00

Published: Thu 03 Jan 2019. Modified: Mon 04 Feb 2019