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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260307T032715Z
UID:https://www.mpsd.mpg.de/events/6712/17178
DTSTART:20161004T090000Z
DTEND:20161004T100000Z
CLASS:PUBLIC
CREATED:20160927T124127Z
DESCRIPTION:Complex quantum many-body systems are ubiquitous in nature\, bu
 t their behaviour often remains very challenging to predict with analytica
 l or numerical calculations - especially when it comes to dynamics. Howeve
 r\, using ultracold atoms in optical lattices it is possible to create pre
 cisely tunable\, yet very accessible artificial solids\, which can be prob
 ed with a large arsenal of observables. Using this experimental set-up\, w
 e demonstrate how a periodically modulated lattice can be described by an 
 effective Floquet-Hamiltonian on longer time scales - even when driving th
 e system far from equilibrium. This allows for implementing Haldane's mode
 l for a topological insulator\, and mapping out its topological transition
 s\, by applying an oscillating force to a honeycomb lattice. Using an osci
 llating magnetic field gradient\, we also engineer spin-dependent bands. B
 y adding interactions to the optical lattice system\, we create a pure rea
 lisation of the Hubbard model and study how the distribution of anti-ferro
 magnetic correlations therein depends on the geometry of the lattice. We i
 nvestigate how fast correlations can re-arrange\, by deforming the lattice
  geometry on time-scales ranging from the sudden to the adiabatic regime. 
 Finally\, we explore how an oscillating force applied to this interacting 
 system may be used to tune and enhance the magnetic exchange energy beyond
  the regimes accessible within the Hubbard model.\nSpeaker: Gregor Jotzu
LAST-MODIFIED:20160927T124127Z
LOCATION:CFEL (Bldg. 99)\, Room: Seminar Room III\, EG.080
ORGANIZER;CN=Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Ultracold Fermions in Optical Lattices as a Testbed f
 or Dynamically Driven Complex Materials
URL;VALUE=URI:https://www.mpsd.mpg.de/events/6712/17178
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