BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Interacting quantum gases in optical lattices with periodic drivin
 g.  - Prof. Elmar Haller\, University of Strathclyde
DTSTART:20240521T140000Z
DTEND:20240521T150000Z
UID:TALK217051@talks.cam.ac.uk
CONTACT:111806
DESCRIPTION:Floquet driving of quantum gases in optical lattices\, e.g.\, 
 using periodically modulated forces or lattice potentials\, offers versati
 le mechanisms for creating tailored lattice potentials in quantum simulati
 on experiments. Recent achievements include the realization of artificial 
 magnetic fields and topological lattice models. Simulating many-body state
 s of interacting particles\, however\, remains challenging as interactions
  create instabilities and heating that quickly destroy the coherence of th
 e system. \nI am going to discuss recent experiments [1-3] that study the 
 role of interactions for the time evolution of superfluids in the lowest b
 and of a driven lattice. Depending on system parameters such as driving st
 rength\, lattice depth and interaction strength\, we identified stable and
  unstable parameter regions and provided a general resonance condition. In
  contrast to the high-frequency approximation of a Floquet description\, w
 e used the superfluid’s micromotion to analyse the growth of phonon mode
 s from slow to fast driving frequencies. Our model allows us to identify s
 everal causes for Floquet heating and to develop strategies to avoid it. \
 n
LOCATION:Ryle Seminar Room (930) 
END:VEVENT
END:VCALENDAR