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SUMMARY:Sub-ballistic growth of Rényi entanglement in quantum systems wit
 h diffusive transport - Dr. Curt von Keyserlingk\, University of Birmingha
 m
DTSTART:20191121T141500Z
DTEND:20191121T151500Z
UID:TALK128662@talks.cam.ac.uk
CONTACT:Katarzyna Macieszczak
DESCRIPTION:There is much current interest in uncovering the universal fea
 tures of entanglement growth and information spreading in quantum systems.
  I will present a new universal result: Following a quench in a generic sy
 stem with diffusive transport\, the higher Rényi entropies grow diffusive
 ly in time while the von Neumann entropy grows linearly. This result has i
 mport for on-going efforts to measure the growth of entanglement entropy i
 n real quantum systems. Our current scalable experimental protocols target
  Rényi entropies\, which were believed to mimic the von Neumann entropy
 —which is the quantity of greatest theoretical interest and the one we w
 ould ideally be able to measure. Our result shows that this widely held be
 lief is untrue: higher Rényi entropies grow in a qualitatively different 
 fashion to the von Neumann entropy.\n\nT. Rakovszky\, F. Pollmann\, and C.
  W. von Keyserlingk\, Phys. Rev. Lett. 122\, 250602 (2019). 
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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