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DTSTART;TZID=Europe/Paris:20220405T140000
DTEND;TZID=Europe/Paris:20220405T153000
DTSTAMP:20260424T142052
CREATED:20220404T060030Z
LAST-MODIFIED:20220404T072528Z
UID:8018-1649167200-1649172600@fermi.univ-tlse3.fr
SUMMARY:Riemann surfaces for the totally asymmetric simple exclusion process with open boundaries (Ulysse Godreau/ LPT / Seminar). - 05/04\, 14 H.
DESCRIPTION:Ulysse Godreau (LPT) \nAbstract : \nThe totally asymmetric exclusion process (TASEP) is a continuous time Markov process much studied in statistical physics featuring particles with hard-core interaction hopping randomly on a one dimensional lattice. \nThis talk will focus on the study of the fluctuations of the particle current in the TASEP with open boundaries in the thermodynamic limit. More precisely\, the eigenvalues of a deformation of the Markov matrix of the process\, connected to the cumulant generating function of the current\, are computed in two different ways. The first excited states are recovered from the ground state eigenvalue (obtained by matrix product ansatz) by analytic continuation. They are then compared with the asymptotics of the Bethe ansatz equations. The eigenstates are put in correspondence with the sheets of a Riemann surfaces\, which is the maximal domain of definition of the analytic continuation of the ground states. Connections are made with KPZ universality and previous results on the TASEP with periodic boundary conditions. \n 
URL:https://fermi.univ-tlse3.fr/event/riemann-surfaces-for-the-totally-asymmetric-simple-exclusion-process-with-open-boundaries-ulysse-godreau-lpt-seminar-05-04-14-h/
LOCATION:salle de séminaire 3ème étage\, Bâtiment 3r1 Université Toulouse III\, Toulouse\, 31400\, France
CATEGORIES:Events,LPT,Seminars
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220412T140000
DTEND;TZID=Europe/Paris:20220412T160000
DTSTAMP:20260424T142052
CREATED:20220411T050055Z
LAST-MODIFIED:20220411T064719Z
UID:7985-1649772000-1649779200@fermi.univ-tlse3.fr
SUMMARY:How to make your code run faster using GPUs (Alejandro Estana  / LPT / Seminar). - 12/04\, 14 H.
DESCRIPTION:Alejandro Estana (LPT) \nAbstract : \nIf the sequential execution of our code is not fast enough for our purpose\, we can start thinking about parallelizing it. Parallelize a code means that some parts of the code will be run in parallel and therefore the total computing time will be reduced. Because of its parallel processing architecture\, the Graphics Processing Units (GPU) has become an essential component when we think about parallelising a code. New clusters contains GPUs in their computing nodes and if we want to take advantage of their computational power we need to adapt our code one way or another. \nIn the first part of the talk\, I will introduce the GPU architecture and GPU programming explaining the different approaches that we can take to use the GPUs power. \nIn the second part of the talk\, I will present three practical examples of GPU parallelization that I have implemented in collaboration with researchers of the LPT and IRAP (Institut de recherche en astrophysique et planétologie). \n\n 
URL:https://fermi.univ-tlse3.fr/event/how-to-make-your-code-run-faster-using-gpus-alejandro-estana-lpt-seminar-12-04-14-h/
LOCATION:salle de séminaire 3ème étage\, Bâtiment 3r1 Université Toulouse III\, Toulouse\, 31400\, France
CATEGORIES:Events,LPT,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220419T140000
DTEND;TZID=Europe/Paris:20220419T153000
DTSTAMP:20260424T142052
CREATED:20220419T060058Z
LAST-MODIFIED:20220419T065333Z
UID:8021-1650376800-1650382200@fermi.univ-tlse3.fr
SUMMARY:Dynamical Griffiths singularities (José A. Hoyos  / LPT / Seminar). - 19/04\, 14 H.
DESCRIPTION:José A. Hoyos  (Université de São Paulo\, Brésil) \nAbstract : \nWe investigate the effects of impurities on the unitary evolution of an interacting quantum system after a quench. For a large variety of quench protocols\, the impurities become locally highly excited while the bulk practically remains in its ground state. As a consequence\, the system’s early-times dynamics is dominated by the impurities and new dynamical quantum phase transitions appear. Finally\, we interpret our results as a dynamical analog of the Griffiths singularities in equilibrium thermodynamics. \n\n 
URL:https://fermi.univ-tlse3.fr/event/dynamical-griffiths-singularities-jose-a-hoyos-lpt-seminar-19-04-14-h/
LOCATION:salle de séminaire 3ème étage\, Bâtiment 3r1 Université Toulouse III\, Toulouse\, 31400\, France
CATEGORIES:Events,LPT,Seminars
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