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Many-body dynamics and gap opening in interacting periodically driven systems

Date: Tuesday, February 20, 2018 11:00 - 12:30
Speaker: Ervand Kandelaki (Copenhagen University)
Location: Big Seminar room Ground floor / Office Bldg West (I21.EG.101)
Series: Physical Sciences Seminar
Host: Maksym Serbyn
Lab building west seminar room

Periodic driving has recently attracted intense interest as a means for controlling and investigating a variety of intriguing quantum many-body phenomena. In particular, driving has been proposed as a new route for altering the topological properties of Bloch bands. In this talk, I will present our study of the transient dynamics in related periodically driven systems, focusing on the role of interactions. I will describe the appearance and time-dependent renormalization of the effective (Floquet) band gap. In addition, I will discuss the time scales for the emergence of the Floquet-Bloch bands in the non-equilibrium correlation functions, accessible in ARPES experiments.
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