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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260126T110000
DTEND;TZID=Europe/Paris:20260126T120000
DTSTAMP:20260509T044802
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:20260127T103000
DTEND;TZID=Europe/Paris:20260127T113000
DTSTAMP:20260509T044802
CREATED:20260123T154556Z
LAST-MODIFIED:20260124T031428Z
UID:10000018-1769509800-1769513400@sfp-alpes.fr
SUMMARY:Juan FONTECILLA-CAMPS (IBS / Groupe Métalloprotéines)
DESCRIPTION:Exaptation : la composante opportuniste de l’évolution et de la sélection naturelle\nRésumé : \nLa variété et la capacité fonctionnelle des êtres vivants ont toujours intrigué les biologistes. Le philosophe grec Aristote était\, il y a plus de 2300 ans\, le premier à classifier les animaux selon la couleur de leur sang. Il croyait aussi que les mêmes animaux avaient existé\, immuables\, depuis une éternité. Il a fallu attendre le XIXe siècle pour que Charles Darwin explique l’évolution des espèces par la sélection naturelle. Cette évolution peut paraître linéaire et\, pour certains\, elle aurait un but (téléologie). Mais pour les évolutionnistes il n’y pas de plan ni de finalité. Un des résultats fondamentaux de la sélection naturelle est l’adaptation ; une fois qu’un organe est devenu utile\, les mutations aléatoires qui améliorent sa fonction seront sélectionnées parce qu’elles sont avantageuses. Mais la sélection naturelle opère aussi de manière opportuniste\, et un organe donné peut se transformer pour remplir une fonction complètement différente de celle d’origine ; c’est l’exaptation. Un cas classique est la transformation d’écailles de dinosaures en plumes d’oiseaux. Pendant mon séminaire je vais illustrer plusieurs cas d’exaptation biologique\, et discuter aussi l’exaptation culturelle. \nContact : ibs.seminaires@ibs.fr \n  \n 
URL:https://sfp-alpes.fr/event/exaptation-la-composante-opportuniste-de-levolution-et-de-la-selection-naturelle/
LOCATION:IBS\, 71 avenue des Martyrs\, Grenoble
CATEGORIES:Séminaire
ORGANIZER;CN="IBS":MAILTO:ibs.seminaires@ibs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260127T110000
DTEND;TZID=Europe/Paris:20260127T120000
DTSTAMP:20260509T044802
CREATED:20260123T161211Z
LAST-MODIFIED:20260124T031619Z
UID:10000019-1769511600-1769515200@sfp-alpes.fr
SUMMARY:Nidia MALDONADO CARMONA (University of Florence\, Italy)
DESCRIPTION:Bringing light to pathogens : light-driven strategies for disinfection of pathogens\nAbstract : \nThe emergence of antimicrobial resistance has prompted the search for new strategies\, aiming to find more efficient ways to kill microbial pathogens. In this sense\, Photodynamic Antimicrobial ChemoTherapy (PACT) uses a combination of light\, oxygen and a photosensitizer molecule to produce lethal reactive oxygen species\, which have demonstrated to be highly effective against microorganisms and even against multiresistant microorganisms. During this talk\, I will address the different challenges that surround the field\, ranging from an efficient delivery of photosensitizers using natural biopolymers\, while also addressing the delivery of light into a clinical scenario model\, addressing the difficulties of biological experiments with\ntwo-variables to juggle with\, technical challenges that hinder the application of this technique into the clinic. \nContact : appaixfl@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/bringing-light-to-pathogens-light-driven-strategies-for-disinfection-of-pathogens/
LOCATION:IAB – Salle de séminaire\, IAB Site Santé - Allée des Alpes\, La Tronche\, 38700\, France
CATEGORIES:Séminaire
ORGANIZER;CN="IAB":MAILTO:appaixfl@univ-grenoble-alpes.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260128T110000
DTEND;TZID=Europe/Paris:20260128T120000
DTSTAMP:20260509T044802
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:20260128T110000
DTEND;TZID=Europe/Paris:20260128T120000
DTSTAMP:20260509T044802
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:20260130T110000
DTEND;TZID=Europe/Paris:20260130T120000
DTSTAMP:20260509T044802
CREATED:20260123T171105Z
LAST-MODIFIED:20260124T032613Z
UID:10000022-1769770800-1769774400@sfp-alpes.fr
SUMMARY:Félix PALM (Université Libre de Bruxelles)
DESCRIPTION:Quantum Hall states in optical lattices : Revealing hidden long-range\nAbstract : \nThe study of interacting quantum Hall states and their exotic anyonic excitations poses a major challenge in current experimental and theoretical research. Quantum simulators\, in particular cold atoms in optical lattices\, provide a promising platform to realize\, manipulate\, and understand such systems with unprecedented control. In this talk\, I will discuss how the local resolution of quantum gas microscopes extends the toolbox of quantum Hall physics. To this end\, I will discuss a fundamental question regarding the topological order of quantum Hall states: the speculated condensation of composite bosons exhibiting quasi long-range order. I will exemplify this mechanism in bosonic [1] and fermionic [2] systems and touch upon its detectability in tensor network simulations and quantum gas microscopes. If time permits\, I will also touch upon the interplay of spin and charge in fermionic quantum Hall states\, resulting in ferromagnetism and skyrmionic spin-textures [2\,3]. Again\, I will present signatures to identify these states in cold-atom quantum simulators. References : [1] Pauw et al.\, Detecting Hidden Order in Fractional Chern Insulators; PRR 6 (2024)  [2] Pauw et al.\, From hidden order to skyrmions: Quantum Hall states in an extended Hofstadter-Fermi-Hubbard model; arXiv:2509.12184 (2025)  [3] Palm et al.\, Ferromagnetism and skyrmions in the Hofstadter–Fermi–Hubbard model; NJP 25 (2023) Contact : cecile.repellin@lpmmc.cnrs.fr
URL:https://sfp-alpes.fr/event/quantum-hall-states-in-optical-lattices-revealing-hidden-long-range-order/
LOCATION:LPMMC – salle Roger Maynard (G421)\, CNRS - LPMMC 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
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