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UID:0-917@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20231013T134500
DTEND;TZID=Europe/Paris:20231013T150000
DTSTAMP:20231010T121024Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/informal-quantum-
 seminar-michele-fava-ens-ulm/
SUMMARY:Informal Quantum Seminar: Michele Fava (ENS Ulm) - Salle des sémin
 aires du FAST et du LPTMS\, bâtiment Pascal n°530 - 13 Oct 23 13:45
DESCRIPTION:What can we learn by measuring nonlinear response functions?Mic
 hele Fava (ENS Ulm)Most conventional experimental probes used in condensed
  matter systems can be interpreted through the framework of linear respons
 e. There are however cases where linear response functions alone are insu
 fficient to discriminate between different physical scenarios. In these si
 tuations\, nonlinear response functions could provide a valuable resource 
 to sharpen our understanding. However\, currently\, a major limitation is 
 the ability to provide a qualitative interpretation of the measured signal
 s.In this talk\, I will discuss two setups where the long-time divergence 
 of nonlinear response functions can be understood and potentially provide 
 insights into condensed matter systems.In the first part of the seminar\, 
 I will show that long-time divergences in 1D systems are produced by scatt
 ering processes [1\,2].In the second part\, I will focus on 2D quantum sys
 tems with topological order and featuring anyonic excitations. I will argu
 e that\, in this case\, a stronger long-time divergence appears\, which co
 uld used as a unique fingerprint of anyons in experimental systems [3].[1]
  MF\, S. Gopalakrishnan\, R. Vasseur\, F. Essler\, S. A. Parameswaran\,  
 arXiv:2208.09490[2] MF\, S. Gopalakrishnan\, R. Vasseur\, S. A. Parameswar
 an\, F. Essler\, in preparation[3] M. McGinley\, MF\, S. A. Parameswaran\,
  arXiv:2210.16249
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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