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DTSTART;TZID=Europe/Paris:20240205T150000
DTEND;TZID=Europe/Paris:20240205T170000
DTSTAMP:20260422T113430
CREATED:20240121T082557Z
LAST-MODIFIED:20240126T082646Z
UID:10044-1707145200-1707152400@fermi.univ-tlse3.fr
SUMMARY:TEM studies of crystallographic defects in Cu-based shape memory alloys. - (Adriana Condó / Seminar / CEMES-NanoX). -  5/02/2024\, 15 H.
DESCRIPTION:Adriana Condó \,   CNEA de San Carlos de Bariloche\, Argentine \nSummary :\nThe shape memory effect and pseudoelastic properties in Cu-based alloys have their origin in a martensitic transformation that is present for a certain composition range. The martensitic transformation involves a crystalline structure change without atomic diffusion\, and different crystallographic defects are generated during the transformation. The transformation can be induced by an applyed stress or by a temperature change\, and proceeds by the movement of an undistorted habit plane. The condition of an undistorted habit plane implies the presence of stacking faults or twins\, which in addition interact with other defects also created during the martensitic transformation. In this presentation\, transmission electron microscopy studies of these crystallographic defects will be shown. Their detailed study is required to understand the mechanisms of the martensitic transformation in these alloys. The microstructural characterization of martensitic phases has been a subject of study in our group in Argentina for many years\, and now provides the framework of a scientific collaboration with materials research groups in France.
URL:https://fermi.univ-tlse3.fr/event/tem-studies-of-crystallographic-defects-in-cu-based-shape-memory-alloys-adriana-condo-seminar-cemes-nanox-5-02-2024-15-h/
LOCATION:salle de conférence du CEMES\, CEMES - 29\, rue Jeanne Marvig BP 94347\, Toulouse\, 31055\, France
CATEGORIES:CEMES,Events,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20240215T110000
DTEND;TZID=Europe/Paris:20240215T123000
DTSTAMP:20260422T113430
CREATED:20240205T090429Z
LAST-MODIFIED:20240208T120438Z
UID:10008-1707994800-1708000200@fermi.univ-tlse3.fr
SUMMARY:Atom optics and atom interferometry for tests of fundamental physics. - (Enno Giese/ LCAR / Seminar). - 15/02/2024\, 11H
DESCRIPTION:Enno Giese  \nSéminaire LCAR – Jeudi 15 février\, 11H. – Nouvelle Salle de conférence\, 3R4 \nRésumé : \nLight pulses are an excellent tool to manipulate atoms\, so that they move in superposition of different trajectories through space and time. In analogy to the concept of an optical interferometer\, these branches can be brought to interference and used as sensors for gravity and other inertial forces. As such\, atom interferometry has become a versatile tool technique high-precision quantum metrology\, which ranges from gyroscopes to gravitational-wave detection\, as well as a testbed for the interface of relativity and quantum mechanics or the detection of dark-matter candidates. \nAt the same time\, atoms not only possess a center-of-mass motion\, but also internal degrees of freedom that are the very basis for atomic clocks. Making use of this additional property\, one can in principle generate atomic clocks that move in superposition of different branches\, interfere with each other\, and therefore constitute a different probe of relativistic effects linked to time. \nThis seminar gives an introduction into the main concepts of atom interferometry and the toolbox necessary to manipulate atoms. While we explain basic examples of atom interferometers\, spurious effects like their multipath nature\, and state-of-the-art experiments ; we also discuss current and ambitious proposals for high-precision tests of fundamental physics.
URL:https://fermi.univ-tlse3.fr/event/atom-optics-and-atom-interferometry-for-tests-of-fundamental-physics-enno-giese-lcar-seminar-15-02-2024-11h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LCAR,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20240226T110000
DTEND;TZID=Europe/Paris:20240226T123000
DTSTAMP:20260422T113430
CREATED:20240223T082500Z
LAST-MODIFIED:20240223T082528Z
UID:10065-1708945200-1708950600@fermi.univ-tlse3.fr
SUMMARY:Dynamical Freezing and Emergent Floquet Conservation Laws. - (Arnab Das / LPT / Seminar). - 26/02/2024\, 11 H.
DESCRIPTION:Arnab Das  (Indian Association for the Cultivation of Science\, Kolkata ) \nSeminar LPT\, 26/02/2024\, 11H\, 3R4\, Conference hall \nAbstract:: \nPeriodically driven quantum system with several degrees of freedom is naïvely expected to heat up indefinitely leading a locally infinite temperature -like state at long time. A strong exception to this intuitive picture is observed if the drive strength crosses a threshold. Below the threshold\, the expected Floquet Thermalization prevails\, while above it\, a set of approximate but perpetual conservation law emerge\, fragmenting the Hilbert space stably into their eigensubspaces. This has been demonstrated for a large class of text book many-body systems including quantum Ising model of any dimension\, and interaction distribution (including homogeneous)\, and any Heisenberg system\, with strong manifestations in both finite and infinite systems. Here we will discuss the salient features of the phenomenology of Dynamical Freezing\, and also reviewe the marginal analytical understanding of the subject obtained so far. \n\n\n \n 
URL:https://fermi.univ-tlse3.fr/event/dynamical-freezing-and-emergent-floquet-conservation-laws-arnab-das-lpt-seminar-26-02-2024-11-h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20240227T140000
DTEND;TZID=Europe/Paris:20240227T153000
DTSTAMP:20260422T113430
CREATED:20240215T074458Z
LAST-MODIFIED:20240223T082845Z
UID:9439-1709042400-1709047800@fermi.univ-tlse3.fr
SUMMARY:Self-tests of Physical Theories in Networks and Their Implications for the Foundations of Quantum Theory. - (Mirjam Weilenmann/ LPT / Seminar). - 27/02/2024\, 14 H.
DESCRIPTION:Mirjam Weilenmann ((IQOQI\, Vienne) \nSeminar LPT\, 27/02/2024\, 14H\, 3R1\, seminar room\, 3rd floor \nAbstract :\nSelf-testing usually refers to the task of taking a given set of observed correlations that are assumed to arise via a process that is accurately described by quantum theory\, and trying to infer the quantum state and measurements from this. In other words\, it is concerned with the question of whether we can tell what quantum black-box devices are doing by looking only at their input-output statistics and is known to be possible in several cases. In this talk\, I will introduce a more general question : is it possible to self-test a theory\, and\, in particular\, quantum theory ? More precisely\, I will ask whether within a particular network there are tasks that can only be performed in theories that have the same correlations as quantum mechanics. I will introduce two candidate tasks\, both adaptations of the usual CHSH-Bell-test in a larger network and will show how they can be used to rule out theories. The first one can be used to rule out a variety of theories including the theory of box-world\, which is based on a state space that includes PR-boxes. The second one recently allowed us to rule out quantum theory over real Hilbert spaces as incompatible with our experimental observations. Our work goes beyond previous approaches that usually compare different theories according to their properties\, often by imposing postulates to recover them. By finding self-tests we design more objective\, experimentally verifiable procedures to rule out other theories.
URL:https://fermi.univ-tlse3.fr/event/tba-mirjam-weilenmann-lpt-seminar-27-02-2024-14-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:20240228T110000
DTEND;TZID=Europe/Paris:20240228T123000
DTSTAMP:20260422T113430
CREATED:20240214T120406Z
LAST-MODIFIED:20240216T081208Z
UID:10052-1709118000-1709123400@fermi.univ-tlse3.fr
SUMMARY:La transition écologique des laboratoires : le cas de l'IRIT. - (Laure Vieu /  Seminar / CEMES). - 28/02/2024\, 11H
DESCRIPTION:Les séminaires du jeudi\n \nLaure Vieu\,   Institut de Recherche en Informatique de Toulouse \nRésumé :\nDepuis 2021\, Labos1point5 conduit une expérimentation afin de tester différents moyens de réduire l’empreinte de la recherche au niveau des laboratoires. L’Institut de Recherche en Informatique de Toulouse (IRIT\, UMR 5505)\, qui s’est doté à la même date d’une mission « Transition Ecologique » animée par Laure Vieu\, a rejoint la vingtaine de « labos pilotes » de cette expérimentation. \nAprès une mise en contexte de la transition écologique dans les laboratoires français impulsée par le collectif et GDR Labos1point5\, Laure Vieu présentera dans cet exposé le processus de construction collective du plan de transition actuellement mis en place à l’IRIT. \nChaque laboratoire a sa spécificité\, qui se reflète dans son bilan GES. A l’IRIT\, le poste des missions représentait en 2019 presque la moitié de l’empreinte\, ce qui permet d’envisager une réduction significative sans remettre en cause le coeur de métier. Après deux ans d’assemblées participatives\, d’ateliers et d’échanges sous diverses modalités le Groupe de Travail de la mission Transition Ecologique de l’IRIT a synthétisé l’ensemble des contributions et proposé un ensemble de 5 scénarios de réduction (un sixième scénario « zéro » correspond au scénario tendanciel). En juillet 2023\, le personnel de l’IRIT a voté par classement de préférences sur ces scénarios et a sélectionné un scénario de transition ambitieux.
URL:https://fermi.univ-tlse3.fr/event/la-transition-ecologique-des-laboratoires-le-cas-de-lirit-laure-vieu-seminar-cemes-28-02-2024-11h/
LOCATION:salle de conférence du CEMES\, CEMES - 29\, rue Jeanne Marvig BP 94347\, Toulouse\, 31055\, France
CATEGORIES:CEMES,Events,Seminars
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