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UID:0-923@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20240123T110000
DTEND;TZID=Europe/Paris:20240123T120000
DTSTAMP:20240115T192017Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-markus-mueller-psi/
SUMMARY:Séminaire du LPTMS : Markus Mueller (PSI Villigen\, Switzerland) -
  Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°530 - 23 
 Jan 24 11:00
DESCRIPTION:Exact solution of the classical and quantum Heisenberg mean fie
 ld spin glassesMarkus Mueller (PSI Villigen\, Switzerland)While the physic
 s of classical and quantum Ising spin glasses has been rather thoroughly u
 nderstood\, glasses of Heisenberg (vector) spins have remained a difficult
  and largely unsolved problem\, including especially its quantum version\,
  which governs the local moments in randomly doped\, strongly correlated m
 aterials. I will present the numerically exact mean field solution of quan
 tum and classical Heisenberg spin glasses\, based on the combination of a 
 high precision numerical solution of the Parisi full replica symmetry brea
 king equations and a continuous time Quantum Monte Carlo. We find that the
  Heisenberg (vector) spin glasses have a rougher energy landscape than the
 ir Ising analogues\, which affects their avalanche response to external st
 imuli. The (short time) quantum dynamics and collective excitations exhibi
 t a surprisingly slow temperature evolution\, that\, at asymptotically low
  temperatures\, tend to the superuniversal form found so far in all insula
 ting mean field glasses. We extend our analysis to the doped\, metallic He
 isenberg spin glass\, which displays an unexpectedly slow spin dynamics re
 flecting the proximity to the melting quantum critical point and its assoc
 iated Sachdev-Ye-Kitaev Planckian dynamics. Ref: N. Kavokine\, M. Müller\
 , A. Georges\, and O. Parcollet https://doi.org/10.48550/arXiv.2312.14598
CATEGORIES:seminars
LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53
 0\, rue André Riviere\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\
 , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST 
 et du LPTMS\, bâtiment Pascal n°530:geo:0,0
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DTSTART:20231029T020000
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