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DTSTART:20190331T030000
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DTSTART:20191027T020000
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DTSTAMP:20260405T014549Z
UID:5c62958d1c9ff693052796@ist.ac.at
DTSTART:20190618T110000
DTEND:20190618T120000
DESCRIPTION:Speaker: Karsten Held\nhosted by Georgios Katsaros\nAbstract: E
 lectronic correlations give rise to fascinating physical phenomena such as
  high-temperature superconductivity and (quantum) criticality\, but their 
 theoretical description remains a grand challenge. Dynamical mean field th
 eory has been a big step forward: it accurately describes the local electr
 onic correlations including their quantum\, temporal dynamics. In recent y
 ears diagrammatic extensions of dynamical mean field theory\, such as the 
 dynamical vertex approximation\, have been developed. These methods not on
 ly include the dynamcis but also non-local correlations on all length scal
 es [1].After a brief introduction to these methods\, I will present some r
 ecenthighlights: the discovery of a new universality class of quantum crit
 ical exponents in the Hubbard model [2]\, the description of quantum criti
 cality in the periodic Anderson model [3]\, and the discovery of new polar
 itons in strongly correlated electron systems\, coined $\\pi$-tons[4].[1] 
 G. Rohringer\, H. Hafermann\, A. Toschi\, A.?A. Katanin\, A.?E. Antipov\, 
 M.?I. Katsnelson\, A.?I. Lichtenstein\, A.?N. Rubtsov\, and K. Held\, Rev.
 Mod. Phys. 90\, 025003  (2018)[2] T. Schfer\, A.?A. Katanin\, K. Held\, an
 d A. Toschi Phys. Rev. Lett.119\, 046402 (2017).[3] T. Schfer\, A. A. Kata
 nin\, M. Kitatani\, A. Toschi\, and K. Held Phys.Rev. Lett. (2019) accepte
 d [arXiv:1812.03821].[4] A. Kauch\, P. Pudleiner\, K. Astleithner\, T. Rib
 ic\, and K. Held [arXiv:1902.09342]
LOCATION:Mondi Seminar Room 2\, Central Building\, ISTA
ORGANIZER:swiddman@ist.ac.at
SUMMARY:Karsten Held: Spatio-temporal electronic correlations: From quantum
  criticality to $\\pi$-tons
URL:https://talks-calendar.ista.ac.at/events/1965
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