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X-WR-CALDESC:Évènements pour SFP Alpes
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DTSTART;TZID=Europe/Paris:20260131T000000
DTEND;TZID=Europe/Paris:20260131T235959
DTSTAMP:20260129T103601Z
CREATED:20260124T040835Z
LAST-MODIFIED:20260129T103601Z
UID:10000031-1769817600-1769903999@sfp-alpes.fr
SUMMARY:33e édition des olympiades de physique
DESCRIPTION:Ce concours scientifique expérimental destiné aux lycéens\, permet à de petites équipes d’élèves de vivre pendant plusieurs mois une passionnante aventure scientifique autour d’un projet expérimental dont ils choisissent librement le sujet et dans lequel ils vont pouvoir laisser s’exprimer leur créativité et leur initiative. \nLe samedi 31 janvier de 10h à 15h30\, venez découvrir leurs travaux lors de l’exposition publique dans la Grande Verrière du Château Saint-Léger. \nA l’issue de l’exposition publique\, une conférence passionante « Des concepts aux applications : les deux révolutions quantiques » par Alain Aspect\, prix Nobel de physique 2022\, sera proposée dans le Grand Auditorium de 16h30 à 17h30. \nPlus d’informations : \nhttps://www.eventbrite.fr/e/billets-33e-edition-des-olympiades-de-physique-1977023995992?aff=oddtdtcreator \niX campus – 34 rue de la Croix de Fer – 78100 St-Germain-en-Laye (France)\nContact : emma.gosse@orange.fr
URL:https://sfp-alpes.fr/event/33e-edition-des-olympiades-de-physique/
LOCATION:St-Germain-en-Laye\, iX campus
CATEGORIES:Evènements
ATTACH;FMTTYPE=image/png:https://sfp-alpes.fr/wp-content/uploads/2026/01/SFPevent-4.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260128T110000
DTEND;TZID=Europe/Paris:20260128T120000
DTSTAMP:20260124T012948Z
CREATED:20260124T010421Z
LAST-MODIFIED:20260124T012948Z
UID:10000021-1769598000-1769601600@sfp-alpes.fr
SUMMARY:Giovanni FINOCCHIO (University of Messina\, Italy)
DESCRIPTION:Adaptive Ising Machines : a paradigm combining oscillatory dynamics and probabilistic sampling\nRésumé : \nThe first part of the talk will focus on probabilistic computing which is one direction to implement Ising Machines with Probabilistic computing that is a computational paradigm using probabilistic bits (p-bits)\, unit in the middle between standard bit and q-bits. I will show how to map hard combinatorial optimization problems (Max-Sat\, Max-Cut\, etc) into Ising machine and how to implement those in spintronic technology. I will present new directions in this field considering the concept of extended probabilistic variables such as p-dit and p-int. I will then discuss oscillatory Ising Machines dynamics with the aim of introducing the concept of Adaptive Ising Machines. For doing that\, first I will discuss the universal theory of phase auto-oscillators driven by a bi-harmonic signal (having frequency components close to single and double of the free-running oscillator frequency) with noise showing how deterministic phase locking and stochastic phase slips can be continuously tuned by varying the relative amplitudes and frequencies of the driving components. I will then focus on how to use spin-torque nano-oscillators for implementing deterministic\, probabilistic computing and dual-mode operation of Adaptive Ising Machines that dynamically combines both regimes within the same hardware platform by properly tuning noise strength and a bi-harmonic excitation. Benchmarking on different classes of combinatorial optimization problems\, the CoIM exhibits complementary performance as compared to OIMs and probabilistic Ising machines PIMs\, with adaptability to the specific problem class. This work introduces the first oscillator-based Ising machine capable of transitioning between deterministic and probabilistic computation\, opening a path toward scalable\, CMOS-compatible hardware for hybrid optimization and inference. This work was supported under the project number 101070287 — SWAN-on-chip — HORIZON-CL4-2021-DIGITAL-EMERGING-01\, the project PRIN 2020LWPKH7 funded by the Italian Ministry of University and Research and by the PETASPIN association (www.petaspin.com) and it has been also funded by European Union (NextGeneration EU)\, through the MUR-PNRR project SAMOTHRACE (ECS00000022). \nContact : admin.spintec@cea.fr
URL:https://sfp-alpes.fr/event/adaptive-ising-machines-a-paradigm-combining-oscillatory-dynamics-and-probabilistic-sampling/
LOCATION:CEA – Salle de Séminaire IRIG (1005 – 445)\, Laboratoire Irig/Spintec\, salle de séminaire 445\, bâtiment 1005\, CEA-Grenoble\, Grenoble
CATEGORIES:Séminaire
ORGANIZER;CN="IRIG - CEA":MAILTO:odile.rossignol@cea.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260128T110000
DTEND;TZID=Europe/Paris:20260128T120000
DTSTAMP:20260124T031950Z
CREATED:20260123T162130Z
LAST-MODIFIED:20260124T031950Z
UID:10000020-1769598000-1769601600@sfp-alpes.fr
SUMMARY:Juan POLO (Technology Innovation Institute\, Abu Dhabi)
DESCRIPTION:Static impurity in a mesoscopic system of SU(N) fermionic matter-wavesJuan POLO \nAbstract : \nWe investigate the effects of a static impurity\, modeled by a localized barrier\, in a one-dimensional mesoscopic system comprised of strongly correlated repulsive SU(N)-symmetric fermions. For a mesoscopic sized ring under the effect of an artificial gauge field\, we analyze the particle density and the current flowing through the impurity at varying interaction strength\, barrier height and number of components. We find a non-monotonic behaviour of the persistent current\, due to the competition between the screening of the impurity\, quantum fluctuations\, and the phenomenon of fractionalization\, a signature trait of SU(N) fermionic matter-waves in mesoscopic ring potentials. This is also highlighted in the particle density at the impurity site. We show that the impurity opens a gap in the energy spectrum selectively\, constrained by the total effective spin and interaction. Our findings hold significance for the fundamental understanding of the localized impurity problem and its potential applications for sensing and interferometry in quantum technology. \nContact : pierre.nataf@lpmmc.cnrs.fr
URL:https://sfp-alpes.fr/event/static-impurity-in-a-mesoscopic-system-of-sun-fermionic-matter-waves/
LOCATION:LPMMC – salle Roger Maynard (G421)\, CNRS - LPMMC 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260126T110000
DTEND;TZID=Europe/Paris:20260126T120000
DTSTAMP:20260124T031309Z
CREATED:20260123T152423Z
LAST-MODIFIED:20260124T031309Z
UID:10000017-1769425200-1769428800@sfp-alpes.fr
SUMMARY:Jean CAPPELLO (Institut Lumière Matière\, Lyon)
DESCRIPTION:Transport of beads\, bubbles and droplets in cylindrical microchannel : The role of inertia and deformations\nAbstract : \nWhen transported in microchannels at intermediate Reynolds number\, beads\, droplets or bubbles show interesting dynamics such as lateral migration. For rigid beads this migration is solely induced by inertial forces which lead to lateral motion of the particle until it reaches an equilibrium uncentered position in the microchannel. Transport of deformable objects as droplets or bubbles is even richer as the coupling between deformation and the external flow results in another lateral migration force whose orientation depends on the viscosity ratio of the two phases. I will present a study in which we investigate\, both experimentally and numerically\, the velocity and lateral position of beads\, droplets and bubbles transported in a cylindrical pipe. By varying the object size\, the viscosity ratio\, the density\, the Reynolds number and the capillary number\, we offer an exhaustive parametric study exploring various dynamics from the non-deformable viscous regime to the deformable inertial regime\, thus enabling us to highlight the sole and combined roles of inertia and capillary effects on lateral migration. Then\, focusing on the specific case of bubbles\, we further identify an intriguing regime at large deformations in which bubbles travel faster than the maximum velocity of the carrier flow. We rationalize this behavior in the limit of large bubbles and show that it originates from a reduction of the hydraulic resistance of the multiphase system. Finally\, we determine the key parameters governing the onset of this “superfast” regime and demonstrate that it occurs only within a limited range of capillary and Reynolds numbers. \nContact : elise.lorenceau@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/transport-of-beads-bubbles-and-droplets-in-cylindrical-microchannel-the-role-of-inertia-and-deformations/
LOCATION:LiPhy\, Salle de Conférence\, 140 rue de la Physique\, St Martin d'Hères\, 38400
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20251006T000000
DTEND;TZID=Europe/Paris:20251008T235959
DTSTAMP:20260124T032820Z
CREATED:20250718T161252Z
LAST-MODIFIED:20260124T032820Z
UID:10000008-1759708800-1759967999@sfp-alpes.fr
SUMMARY:SEMINAIRE DANIEL DAUTREPPE 2025 : Quantum Sciences & Technologies
DESCRIPTION:Website : dautreppe2025.sciencesconf.org \nTopics of this PhD training school on Quantum Sciences and Technologies. \nSix expert lecturers have been chosen for their pedagogical skills. \nEach lecturer will give a 3-hour class designed to take you from masters level to the cutting edge of research in a given topic. \nSpecifically : \n– Quantum circuits and algorithms – Hui Khoon Ng (Yale-NUS\, Singapore) \n– Quantum cryptography – Ramona Wolf (University of Siegen\, Germany) \n– Superconducting circuits – Ioan Pop (Karlsruhe Institute of Technology [KIT] & Stuttgart University\, Germany) \n– Photonics – Julien Claudon (IRIG\, CEA-Grenoble) \n– Quantum sensing – Benjamin Pigeau (Inst. Néel\, Université Grenoble Alpes & CNRS) \n– Quantum matter – Cécile Repellin (LPMMC\, Université Grenoble Alpes & CNRS) \n  \nThis training school will be an excellent preparation to understand presentations and posters at QuantAlps Days 2025 (Grenoble 13-14 Oct 2025) and the annual workshop of the GDR-TeQ “Technology Quantique” (Grenoble Nov 2025 – date to be confirmed). \nTarget Audience : The school is for anyone doing a PhD in Quantum Sciences or Technologies in Grenoble (and it is open to others in the limit of available space). \nHistory : This PhD training school is in the series called the Seminaires Dautreppe\, that have been organized in Grenoble since 1969 by the Alpes section of the  Société Française de Physique (each year on a different topic). This year it is being organized jointly with QuantAlps\, on the theme of the Unesco’s “2025 International Year of Quantum Sciences and Technologies”. \n  \nThe organizing committee of the Dautreppe PhD training school on Quantum Science & Technologies : \nJoël Cibert (SFP Alpes) CNRS Institut Néel \nRobert Whitney (SFP Alpes & QuantAlps) CNRS LPMMC \nAnna Minguzzi (Director of QuantAlps) CNRS LPMMC \nFrank Balestro (Director of QuantEdu) Professor Université Grenoble Alpes  \nValentin Savin (QuantAlps) CEA Leti \nHermann Sellier (QuantAlps) CNRS Institut Néel \nAlastair Abbott (QuantAlps) Inria Grenoble \nRomain Maurand (QuantAlps) CEA PHELIQS \nClemens Winkelmann (QuantAlps) Grenoble-INP \nParinaz Tajabor (QuantAlps Project Manager) Université Grenoble Alpes
URL:https://sfp-alpes.fr/event/seminaire-daniel-dautreppe-2025-quantum-sciences-technologies/
CATEGORIES:Conférence
ORGANIZER;CN="SFP Alpes":MAILTO:contact@sfp-alpes.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250616T110000
DTEND;TZID=Europe/Paris:20250616T120000
DTSTAMP:20250612T111405Z
CREATED:20250612T111344Z
LAST-MODIFIED:20250612T111405Z
UID:10000007-1750071600-1750075200@sfp-alpes.fr
SUMMARY:Structure and transport in 2D-nanoconfined electrolytes - Damien TOQUER (ENS Paris)
DESCRIPTION:Résumé : \nRecent experimental advances in nanofluidics have enabled the exploration of ion transport across molecular-scale pores. Conductance and flow measurements show that electrostatic coupling between the ions and the confining walls plays a major role. Despite these advances\, direct measurements of ionic behaviour in such small systems remain challenging. Numerical simulations and theoretical modelling help break down complex phenomena into simple physical ingredients. \nI will first show that the electrostatic interactions between the ions are enhanced by the confinement of the electric field. As a result\, the ions become strongly correlated over long distances. One consequence of these correlations is ionic pairing\, which suppresses linear ionic conduction at low voltage drop\, in accord with experiments in MoS2 nanochannels. This effect shows promising applications in the active domain of ionic memristors. [1] \nI will then show that those strong correlations allow the emergence of collective charge fluctuations of the ions. Those fluctuation modes can couple with plasmonic modes in the solid\, and directly affect the transport properties of the flow\, in particular in systems with a strong physisorbed surface charge. This paves the way for smart tuning of liquid transport by solid engineering\, with possible applications to ion separation and desalination technologies. [2] \n[1] Damien Toquer\, Lydéric Bocquet\, Paul Robin; Ionic association and Wien effect in 2D confined electrolytes. J. Chem. Phys. 14 February 2025; 162 (6): 064703. https://doi.org/10.1063/5.0241949\n[2] Damien Toquer\, Baptiste Coquinot\, Nikita Kavokine\, Lydéric Bocquet [In preparation]
URL:https://sfp-alpes.fr/event/structure-and-transport-in-2d-nanoconfined-electrolytes-damien-toquer-ens-paris/
LOCATION:LiPhy\, Salle de Conférence\, 140 rue de la Physique\, St Martin d'Hères\, 38400
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250507T110000
DTEND;TZID=Europe/Paris:20250507T120000
DTSTAMP:20250425T083338Z
CREATED:20250425T083338Z
LAST-MODIFIED:20250425T083338Z
UID:10000006-1746615600-1746619200@sfp-alpes.fr
SUMMARY:Isotropic amorphous topological phases - Daniel VARJAS
DESCRIPTION:Résumé : \nTopological phases of matter are distinguished by robust properties that are insensitive to perturbations. These include quantized responses\, perfectly conducting interfaces\, and exactly zero energy modes\, with wide-ranging technological applications. Recent years saw the complete classification of topological band structures\, revealing an abundance of topological crystalline insulators. Many questions about the robustness of these phases to disorder are\, however\, still open. We develop new theoretical and numerical methods based on local topological markers and effective momentum-space Hamiltonians to study topological phases in disordered systems. We introduce symmetry indicators for amorphous systems\, and we also demonstrate that it is possible to construct a fully isotropic and inversion-symmetric three-dimensional medium where time-reversal symmetry is systematically broken. We propose an amorphous system with scalar time-reversal symmetry breaking\, implemented by hopping through chiral magnetic clusters along the bonds. The average spatial symmetries alone protect a statistical topological insulator phase in this system\, analogous to crystalline mirror Chern insulators. We also show the expected transport properties of a three-dimensional statistical topological insulator\, which remains critical on the surface for odd values of the invariant.
URL:https://sfp-alpes.fr/event/isotropic-amorphous-topological-phases-daniel-varjas/
LOCATION:LPMMC\, CNRS - Bat G\, salle Roger Maynard G-421\, Grenoble
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250424T140000
DTEND;TZID=Europe/Paris:20250424T150000
DTSTAMP:20250418T085804Z
CREATED:20250418T085804Z
LAST-MODIFIED:20250418T085804Z
UID:10000004-1745503200-1745506800@sfp-alpes.fr
SUMMARY:How AI can help us elucidate chemical reaction mechanisms ? / Comment l'IA peut nous aider à élucider les mécanismes des réactions chimiques ?
DESCRIPTION:Rolf DAVID (DCM\, Equipe SiTH)
URL:https://sfp-alpes.fr/event/how-ai-can-help-us-elucidate-chemical-reaction-mechanisms-comment-lia-peut-nous-aider-a-elucider-les-mecanismes-des-reactions-chimiques/
LOCATION:DCM\, Salle de C209 Bât Chimie Recherche\, St Martin d'Hères\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250408T100000
DTEND;TZID=Europe/Paris:20250408T120000
DTSTAMP:20250408T063428Z
CREATED:20250408T063134Z
LAST-MODIFIED:20250408T063428Z
UID:10000003-1744106400-1744113600@sfp-alpes.fr
SUMMARY:Nanofluidics meets condensed-matter physics : challenges and perspectives at the Quantum Plumbing Lab
DESCRIPTION:Nikita Kavokine (EPFL\, Switzerland)\n\n\n The hydrodynamic wall has traditionally been considered a featureless object\, whose only role is to provide a boundary for the fluid flow. Yet\, there is now ample evidence that at nanometer scales\, fluid flows are sensitive to the wall’s internal degrees of freedom. Recently\, we have developed a field theory formalism that captures the interaction between interfacial liquid flows and the wall’s electronic excitations\, in the form of a phenomenon termed quantum friction. In this talk\, I will show how quantum friction theory both sheds light on existing experiments\, and predicts new couplings between liquid flows and electronic currents\, with potential applications at the water-energy nexus. I will also highlight the many questions that it leaves unanswered\, along with the experimental program that we are deploying to solve them at the Quantum Plumbing Lab. \nContact : romain.lhermerout@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/nanofluidics-meets-condensed-matter-physics-challenges-and-perspectives-at-the-quantum-plumbing-lab/
LOCATION:LiPhy\, Salle de Conférence\, 140 rue de la Physique\, St Martin d'Hères\, 38400
CATEGORIES:Séminaire
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