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SUMMARY:Quantum geometry and topology with (a) spin - Dr Gunnar Lange (Osl
 o)
DTSTART:20250411T140000Z
DTEND:20250411T153000Z
UID:TALK229909@talks.cam.ac.uk
CONTACT:Bo Peng
DESCRIPTION:The geometry of quantum states has long attracted attention in
  various communities\, as it is useful in optics\, superfluidity and perha
 ps most intriguingly quantum metrology. Recently\, it has been shown that 
 the topology of a set of quantum states constrain their geometry in a non-
 trivial way. \n\nIn this talk\, I will begin by defining quantum geometry\
 , and its relation to Chern topology in time-reversal symmetry broken syst
 ems. I will then discuss how to extend these ideas to time-reversal symmet
 ric systems\, by considering the projected spin spectrum.\n\nThe latter pa
 rt of the talk will be largely based on: \nW. J. Jankowski\, R.-J. Slager\
 , and G. F. Lange\, Quantum geometric bounds in spinful systems with trivi
 al band \ntopology (2025)\, "arXiv:2501.16428":https://arxiv.org/abs/2501.
 16428.
LOCATION:Meeting Room 3 in the RDC (third floor\, close to the cafeteria)
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