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SUMMARY:Gil Refael (Institute for Quantum Information and Matter)
DTSTART:20200921T160000Z
DTEND:20200921T170000Z
DTSTAMP:20260423T024727Z
UID:QM3/17
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/QM3/17/">Flo
 quet higher-order topological insulators: principles and path towards real
 izations</a>\nby Gil Refael (Institute for Quantum Information and Matter)
  as part of Quantum Matter meets Maths (IST\, Lisbon)\n\n\nAbstract\nThe c
 o-existence of spatial and non-spatial symmetries together with appropriat
 e commutation/anticommutation relations between them can give rise to stat
 ic higher-order topological phases\, which host gapless boundary modes of 
 co-dimension higher than one. Alternatively\, space-time symmetries in a F
 loquet system can also lead to anomalous Floquet boundary modes of higher 
 co-dimensions\, with different commutation/anticommutation relations with 
 respect to non-spatial symmetries. In my talk I will review how these dyna
 mical analogs of the static HOTI's emerge\, and also show how a coherently
  excited phonon mode can be used to support non-trivial Floquet higher-ord
 er topological phases. If time allows\, I will also review recent work on 
 Floquet engineering and band flattening of twisted-bilayer graphene.\n
LOCATION:https://researchseminars.org/talk/QM3/17/
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