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UID:0-759@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20210119T110000
DTEND;TZID=Europe/Paris:20210119T120000
DTSTAMP:20210106T132701Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-valentina-ros-lptms/
SUMMARY:Séminaire du LPTMS : Valentina Ros (LPTMS) - LPTMS (100% online se
 minar) - 19 Jan 21 11:00
DESCRIPTION:High-dimensional random landscapes: statistics of critical poin
 ts and dynamical instantons\nValentina Ros (LPTMS)\n\nOnline seminar --- Z
 OOM Meeting ID: 919 8494 7729 -- Password: Ask L. Mazza and D. Petrov --\n
 \n\nHigh-dimensional random functionals emerge ubiquitously when modeling 
 complex systems: for example as energy landscapes in physics\, fitness lan
 dscapes in biology\, or more recently loss landscapes in machine learning.
  They are typically very non-convex: their optimization with stochastic dy
 namics is highly non-trivial due to the abundance of local minima that tra
 p the dynamics for very large times. In this talk\, I will focus on random
  functionals with Gaussian statistics and discuss simple activated process
 es\, in which the system jumps between trapping local minima passing throu
 gh the saddles (or transition states) connecting them. In particular\, I w
 ill discuss how to use random matrix theory to gain information on the dis
 tribution and reciprocal arrangement of the local minima and saddles in co
 nfiguration space\, and how to exploit this information to build dynamical
  instantons describing the activated jumps.
CATEGORIES:seminars
LOCATION:LPTMS (100% online seminar)\, LPTMS - Bâtiment Pascal n° 530 rue
  André Rivière - Université Paris-Saclay\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=LPTMS - Bâtiment Pascal n
 ° 530 rue André Rivière - Université Paris-Saclay\, Orsay\, 91405\, Fr
 ance;X-APPLE-RADIUS=100;X-TITLE=LPTMS (100% online seminar):geo:0,0
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TZID:Europe/Paris
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