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SUMMARY:Anne Nielsen (MPI Dresden)
DTSTART:20201119T150000Z
DTEND:20201119T160000Z
DTSTAMP:20260423T003247Z
UID:IFTWeb/18
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/IFTWeb/18/">
 Special states in quantum many-body spectra</a>\nby Anne Nielsen (MPI Dres
 den) as part of IFT-Madrid Webinars\n\n\nAbstract\nWhile quantum many-body
  systems typically thermalize\, exceptions to thermalization provide inter
 esting opportunities\, e.g. with respect to information storage. One possi
 bility is that all states in the spectrum many-body localize. Another is a
  weak violation of thermalization\, in which a few special states in the s
 pectrum do not thermalize\, while the rest do. This phenomenon is known as
  quantum many-body scars.\n\nHere\, we propose and demonstrate that one ca
 n similarly have a weak violation of many-body localization\, in which one
  or a few states in a spectrum have above area law entanglement\, while th
 e rest of the states are many-body localized. We show that this can be ach
 ieved through a mechanism\, in which emergent symmetry of the special stat
 es prevents many-body localization in these states. In addition\, we provi
 de two examples of normal quantum many-body scars\, in which the special s
 tates are topological.\n\nReferences: arXiv:2002.07824\, arXiv:2009.03923\
 , arXiv:2009.00022\n
LOCATION:https://researchseminars.org/talk/IFTWeb/18/
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