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UID:0-794@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20211109T110000
DTEND;TZID=Europe/Paris:20211109T120000
DTSTAMP:20211109T094922Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-juliane-klamser-espci/
SUMMARY:Séminaire du LPTMS : Juliane Klamser (ESPCI) - Salle des séminair
 es du FAST et du LPTMS\, bâtiment Pascal n°530 - 9 Nov 21 11:00
DESCRIPTION:Monte Carlo descriptions of active matter and their continuous-
 time limits\nJuliane Klamser (École supérieure de physique et de chimie 
 industrielles)\nOnsite seminar + zoom (Meeting ID: 984 8271 3951\, Passco
 de: dX3f5t\, link: https://cnrs.zoom.us/j/98482713951?pwd=L1AyQUtzeEFEMWRi
 c3pBV2NrWUFRUT09)\n\nCoauthors : Olivier Dauchot\, Julien Tailleur\nThe ph
 ysics of active matter is determined by the non-equilibrium dynamics of th
 e constituent particles. While constructing a non-equilibrium Monte Carlo 
 (MC) dynamics for active matter is straightforward\, the question remains 
 to what extent this discrete-time dynamics faithfully captures real-world/
 continuous-time active systems. We focus on a kinetic MC version for the s
 implest kind of active matter: persistently moving\, non-polar\, interacti
 ng particles. On the multi-particle level\, the MC dynamics captures not o
 nly Motility-induced phase separation [1] but also features a non-equilibr
 ium extension of the celebrated two-dimensional melting [2]. We show [3]\,
  however\, that the continuous-time limit of existing MC dynamics[1\,2] is
  ill-defined\, leading to the vanishing of trademark behaviours of active 
 matter such as the motility-induced phase separation\, ratchet effects\, a
 s well as to a diverging mechanical pressure. We show [3] how mixing passi
 ve/uncorrelated moves with active/time-correlated ones regularises this be
 haviour\, leading to a well-defined continuous-time limit. We propose new 
 active kinetic MC algorithms whose continuous-time limits are the Langevin
  descriptions of the work-horse active-matter models\, namely Active-Ornst
 ein Uhlenbeck\, Active Brownian\, and Run-and-Tumbles particles.\n\nRefere
 nces:\n[1] D. Levis and L. Berthier\, Phys. Rev. E 89 (2014)\, 062301\n[2]
  J. U. Klamser\, S. C. Kapfer and W. Krauth\, Nat Commun 9 (2018) 5045\n[3
 ] J. U. Klamser\, O. Dauchot and J. Tailleur\, Phys. Rev. Lett. 127 (2021
 )\, 150602
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:20211031T020000
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