Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Le serveur de séminaires SEMPARIS accueille toutes les annonces de séminaires de la région parisienne, dans tous les domaines de la physique et des mathématiques. Il vous permet aussi de recevoir par courrier électronique la sélection de votre choix. Enfin, il permet l'archivage des présentations au format PDF ou Powerpoint.   [ Plus d'informations ]


Séminaires à venir [30 suivants]
[ vue agenda ]

Vendredi 12 Décembre 2025, 11:00 à LPTM, 4.13 SEM-LPTM-UCP (Seminaires du LPTM , Universite de Cergy Pontoise) cond-mat
Sergei Kruchinin ( Bogolyubov Inst. for Theoretical Physics, Kiev ) Electronic spectrum of graphene nanostructures
Abstract: In this talk, research has been carried out on the electronic properties of nanostructured graphene. We focus our attention on trapped states of the proposed systems such as spherical and toroidal graphene quantum dots (GQDs). Using a continuum model, by solving the Dirac-Weyl equation, and applying periodic boundary conditions of two types, i.e., either with zigzag edges only or with both armchair and zigzag edges, we obtain analytical results for energy levels yielding self-similar energy bands located subsequently one after another on the energy scale. Only for the toroidal quantum dot the distribution of electron density is like Bohr atomic orbitals [1]. By carrying out a computation in the Lifshitz tight-binding one-electron model, we obtain the energy spectrum and electrical conductance of graphene, in the presence of substitutional impurity atoms, thus assessing the influence of the latter. In the weak-scattering approximation, we study specific features of the electron energy spectrum The regions of localization of electron impurity states, which arise at the edges of the spectrum and edges of the energy gap, are investigated [2,3].

Vendredi 12 Décembre 2025, 12:00 à LPENS, L378 ENS-BIOPHYS (ENS Biophysics Seminar) physics.bio-ph
Michael Murrell ( Yale University ) Self-Organized Criticality and Stress Localization in the Cell Cytoskeleton
Abstract: Self-organized criticality can occur in earthquakes, avalanches and biological processes, and is characterized by intermittent, scale-free energy dissipation. In living cells, the actin cytoskeleton undergoes dynamic structural reorganization, particularly during migration and division, where molecular motors generate mechanical stresses that drive large dissipative events. However, the mechanisms governing these critical transitions remain unclear. Here we show that cytoskeletal criticality emerges from the interplay between F-actin organization and active stress generation. Our study focuses on a minimal actomyosin system in vitro, which is composed of F-actin filaments, myosin II motors and nucleation- promoting factors. By systematically varying the actin connectivity and nematic order, we demonstrate that ordered and sparsely connected networks exhibit exponential stress dissipation, whereas disordered and highly connected networks show heavy-tailed distributions of energy release and the 1/f noise characteristic of self-organized criticality. Increased disorder leads to stress localization, shifting force propagation into stiffer mechanical modes, reminiscent of Anderson localization in condensed-matter systems. Furthermore, we show that network architecture directly regulates the myosin II filament size, establishing a chemical–mechanical feedback loop that modulates criticality. Our findings provide insights into the collective cytoskeletal dynamics, energy localization and cellular self-organization.

Vendredi 12 Décembre 2025, 14:00 à LPENS, L378 FORUM-ENS (Forum de Physique Statistique @ ENS) cond-mat.stat-mech
Arthur Alexandre ( EPFL, Swiss Institute of Bioinformatics ) From transport in channels to population evolution: how heterogeneities shape dynamics
Abstract: In this seminar, I will discuss two problems where effective descriptions capture the essential mechanisms at play: one from hydrodynamics and one from population genetics. In hydrodynamics, Taylor dispersion describes the enhanced spreading of particles in a fluid due to the combined effects of diffusion and flow. We show how this phenomenon can be understood in tortuous, highly corrugated channels using an effective model that captures the main transport properties, providing insight into flows in porous media. The gut microbiota presents extensive genetic diversity shaped by its flow-dominated environment. Using a minimal model [2] incorporating flow, diffusion, and microbial growth that we extend to non-neutral mutations, we show how spatial structure and advection influence the fixation of beneficial mutants. This illustrates the interplay between flow, growth, and spatial heterogeneity in shaping microbial evolution. [1] Alexandre, A., Guérin, T. & Dean, D. S. Effective description of taylor dispersion in strongly corrugated channels. Physical Review E 111, 064124 (2025). [2] Labavić, D., Loverdo, C. & Bitbol, A.-F. Hydrodynamic flow and concentration gradients in the gut enhance neutral bacterial diversity. Proceedings of the National Academy of Sciences 119, e2108671119 (2022).

Lundi 15 Décembre 2025, 11:00 à IPHT, Salle Claude Itzykson, Bât. 774 IPHT-STA (Séminaire de Physique Statistique, CEA/Saclay) physics
Patrick Valageas From cosmology to statistical physics and condensed matter: Burgers and Gross-Pitaevskii equations
Abstract: We will discuss some aspects of two dynamics, motivated from cosmology but which originally appeared in hydrodynamics, statistical physics and condensed matter, the Burgers and the Gross-Pitaevskii equations. In the first part, we will present a simple solvable case in 1D with Poisson initial conditions. In the second part, we will discuss the formation of dark matter vortices (as in superfluids).

Mardi 16 Décembre 2025, 10:45 à LPTMC, campus Jussieu, couloir 12-13, 5ème étage, salle 5-23 SEM-LPTMC (Séminaire du Laboratoire de Physique Théorique de la Matière Condensée) cond-mat
Zohar Nussinov ( Washington University ) Gauge-Like Symmetries, Dimensional Reduction, and Dualities: From Topological Order to Constrained Dynamics
Abstract: I will present a unified view of dualities and symmetries. We will start by reviewing how conventional dualities help identify topological defects in Ising, XY, and continuum elasticity theories and demonstrate how gauge invariance and conservation laws enforce kinematic glide for dislocations in elastic media. Next we will turn to general d-dimensional gauge-like symmetries which include "higher form" and "subsystem" symmetries. In quantum and classical systems, these structures can lead to dimensional reduction, constrained dynamics, and forms of fractionalization and topological order. After introducing a generalization of Elitzur's theorem, I will show how the delicate confluence of symmetries and system geometry may lead to topological degeneracies and holographic entropies (associated with exponential in boundary area multiplicities). We will introduce a general (bond-algebraic) framework for dualities which we will employ to illustrate that several models that harbor topological order as well as square lattice compass variants of the Hubbard model exhibit exact three-dimensional classical Ising transitions and further use these dualities to compute the free energy of various other systems including the fracton ``X-cube'' model. We will finally turn to to "non-invertible" symmetries and provide a generalization of Wigner theorem which will illustrate that all such symmetries may be recast as invertible ones, with the bond algebra approach providing a unifying tool. Time permitting, we will show why duality transformations are generally conformal and use this property to derive new relations in combinatorial geometry.

Mardi 16 Décembre 2025, 11:00 à IHES, Centre de conférences Marilyn et James Simons
( Séminaire Laurent Schwartz EDP et applications )
MATH-IHES (TBA) math
Zhongkai Tao ( IHES ) Flexibility of Initial Data in General Relativity

Mardi 16 Décembre 2025, 13:30 à IHES, Centre de conférences Marilyn et James Simons
( Séminaire Laurent Schwartz EDP et applications )
MATH-IHES (TBA) math
Anne De Bouard ( CNRS, Polytechnique ) Gibbs Measure for the Renormalized Stochastic Gross-Pitaevskii Equation in Dimension Two

Mardi 16 Décembre 2025, 14:00 à LPENS, E239 - LPENS Library LPENS-PH (LPENS Particle physics phenomenology and cosmology) hep-th
Shai Chester ( Imperial Coll. London ) Extremal couplings, graviton exchange, and gluon scattering in AdS
Abstract: Extremal cubic couplings in AdS relate bulk fields such that $\Delta_i+\Delta_j=\Delta_k$. Such couplings lead to divergent 3-point Witten diagrams, and do not occur in theories with maximal supersymmetry. We consider the simplest theories where such coupling are non-zero, which are string or M-theory on singular spacetimes with fixed point loci AdS_{d+1}xS^3 for d=3,4,6, which are dual to CFTs in d dimensions. These theories have infinite towers of graviton modes, as well as gluon modes on the singularities. We compute the nonzero coupling between these modes, which is in general (super)-extremal. We use these couplings to compute the graviton exchange term in the holographic correlator of gluon KK modes, which we match to the expected answer in the flat space limit. We then use this graviton exchange term to compute the unmixing of the single trace graviton modes with double traces of gluon modes, which explains the divergent 3- point diagrams.

Mardi 16 Décembre 2025, 14:00 à LPTHE, Library
( In the library, and Zoom link https://cern.zoom.us/j/63031219326? pwd=STlDY2l0UTZOTWd3Ty8zaWVQSzNTdz09 )
LPTHE-PPH (Particle Physics at LPTHE) hep-ph
Julien Froustey ( Valencia University ) Neutrino flavor instabilities in dense astrophysical environments: when, where, what?
Abstract: Accurately modeling neutrino flavor oscillations in global simulations of core- collapse supernovae or neutron star mergers remains a major challenge, albeit a potentially crucial one for making reliable predictions. Indeed, it is now widely recognized that flavor instabilities—in which classically computed neutrino distributions are dramatically altered when including quantum effects—must occur commonly in such environments. In this talk, I will focus on the case of binary neutron star mergers, and specifically discuss so-called "fast" and "collisional" instabilities, trying to answer a few questions. Where and when do they occur? What are their consequences? To address the latter point, a promising strategy is the development of subgrid models of neutrino flavor transformation. In this approach, insights from detailed studies of local quantum neutrino transport are used to formulate effective prescriptions that modify classical neutrino distributions, enabling their incorporation into large-scale simulations. I will thus discuss recent progress on determining the asymptotic states reached after the onset of a flavor instability, a key ingredient for such subgrid models.

Mardi 16 Décembre 2025, 15:00 à IHES, Centre de conférences Marilyn et James Simons
( Séminaire Laurent Schwartz EDP et applications )
MATH-IHES (TBA) math
Xiao Ma ( University of Michigan ) An Introduction to the Wave Kinetic Theory

Mardi 16 Décembre 2025, 16:30 à LPTHE, LPTHE library SEM-LPTHE (Séminaire du LPTHE) cond-mat.dis-nn
Damien Barbier ( EPFL ) The strange case of the binary perceptron: when standard statistical mechanics fails
Abstract: We define and study a statistical mechanics ensemble that characterizes connected solutions in constraint satisfaction problems (CSPs). Built around a well-known local entropy bias, it allows us to better identify hardness transitions in problems where the energy landscape is dominated by isolated solutions. We apply this new device to the symmetric binary perceptron model (SBP), and study how its manifold of connected solutions behaves. We choose this particular problem because, while its typical solutions are isolated, it can be solved using local algorithms for a certain range of constraint density $\alpha$ and threshold $\kappa$. With this new ensemble, we unveil the presence of a cluster composed of delocalized connected solutions. In particular, we demonstrate its stability until a critical threshold $\kappa_{no-mem loc. stab.}$ (dependent on $\alpha$). This transition appears as paths of solutions shatter, a phenomenon that more conventional statistical mechanics approaches fail to grasp. Finally, we compared our predictions to simulations. For this, we used a modified Monte-Carlo algorithm, designed specifically to target these delocalized solutions. We obtained, as predicted, that the algorithm finds solutions until $\kappa\approx\kappa_{no-mem loc. stab.}$.

Mercredi 17 Décembre 2025, 11:00 à LPENS, L378 FORUM-ENS (Forum de Physique Statistique @ ENS) cond-mat.stat-mech
Zohar Nussinov ( Washington University in St. Louis ) Can we solve some hard problems locally? Possible relations between solvability and critical behaviors
Abstract: Limited resources may motivate breaking large-scale problems into small ``local'' pieces and then stitching the so-found solutions. We explore the physics underlying this approach and ``local hardness" (complexity from the local solver perspective) in determining both NP and P-hard spin glass and other system ground states. Errors result from critical instabilities with gapless avalanche-like excitations having fractal boundaries. Within numerical accuracy, the geometrical size of these avalanches appears to conform to universal power-law distributions. Away from criticality, the local solvers rapidly become accurate. We further investigate more broadly the effects of varying only a single link on the ground states and the relation between complexity, critical behaviors, and mechanical chaos in clustering (community detection) problems and their continuum duals. Lastly, we will study the number of ground states of spin glass systems with continuous Gaussian couplings and prove that the latter degeneracy is not unique and depends subtlety on the order in which (i) the thermodynamic limit and (ii) the continuous real number limit of the coupling constants are taken.

Mercredi 17 Décembre 2025, 11:00 à LPTHE, LPTHE library SEM-LPTHE (Séminaire du LPTHE) hep-th
Fabian Ruehle ( Northeastern University ) Backreaction of Fluxes on Calabi-Yau Metrics
Abstract: We study warped IIB flux solutions using the setup of Giddings-Kachru-Polchinski. The solution leads to a warped metric with a warp factor that only depends on the internal coordinates. We want to study the functional form of the warp factor to investigate the singular bulk problem, which states that the warped region is not a small throat in the CY but almost the entire CY becomes strongly warped, which means that the supergravity solution is not well under control. I will explain the necessary steps to study this, which include approximating the CY metric with a neural network, finding imaginary self-dual flux solutions that stabilize the complex structure moduli close to a confiold point, constructing a basis of harmonic (2,1) forms (again using neural networks), and solving the differential equation for the warp factor (using a third neural network). We also discuss several improvements we made to minimize the numerical errors close to the singular regions.

Mercredi 17 Décembre 2025, 14:45 à IHES, Amphithéâtre Léon Motchane PT-IHES (Séminaire de physique théorique de l'IHES) hep-th
Céline Zwikel ( Collège de France ) A Covariant Formulation of Logarithmic Supertranslations at Spatial Infinity
Abstract: I will begin this talk by reviewing asymptotic symmetries. I will then introduce a new symplectic structure and conservative boundary conditions at spatial infinity that accommodate regular logarithmic translations and log-supertranslations. The associated charges are finite and conserved, and I will show that the asymptotic symmetry algebra is an enhancement of the BMS algebra and that it acquires a central extension between supertranslations and log-supertranslations, which together form a Heisenberg algebra. I will conclude with some interesting avenues that this work opens.

Jeudi 18 Décembre 2025, 10:00 à IHP, Amphi Darboux RENC-THEO (Rencontres Théoriciennes) hep-th
Markus Dierigl ( CERN ) The importance of being discrete
Abstract: In this talk I will highlight the importance of discrete data in gauge and gravitational theories. In particular I will describe the classification of deformation classes of spacetime manifolds equipped with these discrete structures (such as discrete gauge fields). These are important for the determination of (topological) global symmetries and anomalies of the underlying theory. In case of quantum gravity theories we expect all global symmetries to be absent and an inclusion of certain defects is required. Finally, I will also describe a strategy to bound allowed discrete gauge symmetries in theories of quantum gravity.

Jeudi 18 Décembre 2025, 11:00 à IJCLAB, Bld. 210, Theory Seminar Room (114) IJCLAB-PTH (Particle Theory Seminar of IJCLAB Orsay) hep-ph
Lukas Allwicher ( DESY ) Cornering New Physics through precision measurements at FCC-ee
Abstract: A future high-intensity e+e- collider running at the Z-pole, while not achieving high energies, offers great potential for BSM explorations through indirect effects. The prospected 6x10^12 Z bosons which would be produced on-shell would not only result in a leap in precision for traditional electroweak observables, but are an excellent heavy flavour factory as well. At the same time, experimental runs above the Z resonance up to the tt-threshold will offer different and complementary insights. We explore the implications of precision measurements at FCC-ee in the search for heavy new physics, both within an EFT approach and in explicit models.

Jeudi 18 Décembre 2025, 11:00 à ESPCI, Room Charpak, entrance building, ground floor, 10 rue Vauquelin, Paris
( Zoom link available at seminaires-lpem@espci.fr )
SEM-EXCEP (Seminaire exceptionnel) cond-mat
Laurent Limot ( Université de Strasbourg, CNRS, IPCMS, UMR 7504, Strasbourg, France ) Single-spin quantum sensing: A molecule-on-tip approach
Abstract: Magnetometry plays a pivotal role in meeting the demands of ultra-dense storage technology and overcoming challenges associated with downscaled spin qubits. A promising approach for atomic-scale single-spin sensing involves utilizing a magnetic molecule as a spin sensor, although its practical realization remains in its early stages. To address this challenge and highlight the potential of this method, we combined a nickelocene molecule with scanning tunneling microscopy to perform versatile spin-sensitive imaging of magnetic surfaces. We investigated model Co islands of varying thickness on Cu(111), exhibiting distinct magnetic properties. Our method demonstrates robustness and reproducibility, providing atomic-scale sensitivity to spin polarization and magnetization orientation due to the direct exchange coupling between the nickelocene-terminated tip and the Co surfaces. This technique enables the acquisition of magnetic exchange maps, revealing unique signatures in the magnetic corrugation that align well with computed spin density maps. We will apply this method to examine the influence of hydrogen on magnetization, a topic of substantial interest in spintronics. These advancements significantly enhance our ability to probe and visualize magnetism at the atomic level.

Jeudi 18 Décembre 2025, 11:30 à IHP, Amphi Darboux RENC-THEO (Rencontres Théoriciennes) hep-th
Oscar Varela ( utah state university, ift madrid ) Exceptional generalised geometry and the class S superconformal index
Abstract: The characterisation of the physics of the M5-brane remains an important open problem in string theory. While the superconformal field theory that resides on planar M5-brane in flat space is poorly understood, other configurations involving M5-brane wrapped on certain manifolds have well-known superconformal field theory descriptions of so-called class S. In this talk, I will use new methods based on exceptional generalised geometry/field theory to describe the gravity duals of class S field theories and provide, for the first time, a holographic match of their superconformal index.

Jeudi 18 Décembre 2025, 14:00 à LPENS, E239 (Bibliothèque de physique théorique) SEM-INFOR (Séminaire informel) cond-mat.stat-mech
Marin Girard ( Virginia Tech ) Quantum Darwinism from quantum error correcting code
Abstract: Quantum Darwinism is a process that aims to explain the emergence of objectivity from quantum mechanics. We present a framework for understanding quantum Darwinian using quantum error correcting codes. We show that the broadcasting process of classical information can be mapped to the encoding process of a quantum code, while the proliferation of classical information is related to its weight enumerator, which governs the redundancy of the encoded information. Leveraging this connection, we introduce an operator algebra language for analyzing the emergence of classical plateaus and the proliferation of classical information which are defining features of quantum Darwinism. We further provide explicit examples of QD toy models by constructing families of Calderbank-Shor-Steane codes. Embedding them into brickwork unitary dynamics, we show "objectivity cones" akin to lightcones emerge.

Vendredi 19 Décembre 2025, 13:00 à CPHT, Salle Louis Michel, CPHT, Ecole polytechnique CPHT-LLR (Colloquium de Particules et Cosmologie) hep-ph|hep-th
Adrien Florio ( Bielefeld U. ) Thermalization and entanglement structures of relativistic fields: explorations in low-dimensions
Abstract: Past decades have revealed the crucial role played by the entanglement structure of quantum states in explaining both phases of matter and thermalization—the emergence of statistical physics from unitary time evolution. Yet our understanding of entanglement in relativistic field theories remains limited, largely confined to conformal and holographic settings. At the same time, we don't have a clear picture of how our universe actually reached thermal equilibrium after inflation. We do not understand why the quark- gluon plasma produced in heavy-ion collisions thermalizes so fast, or what the actual phase diagram of QCD is. In this talk, I illustrate how progress can be made in filling this gap starting from the study of one-dimensional relativistic field theories. I present results on the real-time dynamics of the massive Schwinger model, which shares key features with QCD. In this setup, the medium created by hard back-to-back particles thermalizes through entanglement production. I then move on to discuss how a refined understanding of entanglement in relation to symmetries can serve as a practical tool for detecting and characterizing different phases of matter. Indeed, the so-called "entanglement asymmetry" related to the chiral symmetry in the Schwinger model can be computed analytically in the massless limit, as a function of temperature. Remarkably, it is parametrically more sensitive to symmetry breaking than the corresponding local order parameter, the chiral condensate.

Lundi 5 Janvier 2026, 11:00 à IPHT, Salle Claude Itzykson, Bât. 774 IPHT-MAT (Séminaire de matrices, cordes et géométries aléatoires) physics
Rémy Mahfouf La FK-percolation presque critique en milieu aléatoire
Abstract: Nous étudions la percolation FK où les paramètres des arêtes sont choisis comme des variables aléatoires indépendantes dans le régime proche-critique. Nous montrons que si ces paramètres satisfont une condition naturelle de centrage autour du point critique, alors le modèle quenched présente typiquement un comportement critique à des échelles bien plus grandes que la longueur caractéristique déterministe. Plus précisément, dans une boîte de taille N, si le modèle homogène avec un paramètre d?arête déterministe p a un comportement critique dans le régime |p ? pc| ? W, alors le modèle quenched avec des paramètres d?arête aléatoires p qui satisfont typiquement |p ? pc| ? W^{1/3} a encore un comportement critique. Nous traitons également le cas particulier de la percolation de Bernoulli, où nous montrons que si l?on commence par échantillonner des paramètres d?arêtes aléatoires indépendants non dégénérés centrés autour de 1/2, puis une configuration de percolation sur ces arêtes, le modèle quenched  est presque sûrement critique à grande échelle. Basé sur un travail avec Emile Avérous, disponible sur arXiv 2509.08938.

Mercredi 7 Janvier 2026, 13:30 à DPT-PHYS-ENS, ConfIV (E244) - 24 rue Lhomond 75005 PARIS COLLOQUIUM-ENS (Colloquium of the Physics Department of ENS) physics
Amir Yacoby ( Université de Harvard ) Quantum Sensing of Quantum Matter
Abstract: Important scientific discoveries often happen when scientists have new tools that let them look at complex physical problems in different ways. Recently, there have been exciting breakthroughs in the study of quantum materials. This has led scientists to create new methods for examining their basic qualities. In this talk, Yacoby will discuss some of the recent projects he's worked on to develop new local quantum sensing techniques. He will also talk about how these techniques can help us better understand quantum materials.

Jeudi 8 Janvier 2026, 10:00 à IHP, Room Yvette Cauchois (Perrin building) RENC-THEO (Rencontres Théoriciennes) hep-th
Romuald Janik ( Jagiellonian U. ) TBA
Abstract: TBA

Jeudi 8 Janvier 2026, 11:00 à IHES, Amphithéâtre Léon Motchane
( Séminaire de Géométrie Arithmétique )
MATH-IHES (TBA) math
Konstantin Ardakov ( Mathematical Institute, University of Oxford ) On the mod-p Cohomology of Certain p-saturable Groups
Abstract: The mod-$p$ cohomology of equi-$p$-saturable pro-$p$ groups has been calculated by Lazard in the 1960s. Motivated by recent considerations in the mod-$p$ Langlands program, we consider the problem of extending his results to the case of compact $p$-adic Lie groups $G$ that are $p$-saturable but not necessarily equi-$p$-saturable: when $F$ is a finite extension of $\mathbb{Q}_p$ and $p$ is sufficiently large, this class of groups includes the so-called pro-$p$ Iwahori subgroups of $SL_n(F)$. In general, using the work of Serre and Lazard one can write down a spectral sequence that relates the mod-$p$ cohomology of $G$ to the cohomology of its associated graded mod-$p$ Lie algebra $\mathfrak{g}$. We will discuss certain sufficient conditions on $p$ and $G$ that ensure that this spectral sequence collapses. When these conditions hold, it follows that the mod-$p$ cohomology of $G$ is isomorphic to the cohomology of the Lie algebra $\mathfrak{g}$.

Jeudi 8 Janvier 2026, 16:00 à LPENS, L378 FORUM-ENS (Forum de Physique Statistique @ ENS) cond-mat.stat-mech
Francesca Mignacco ( Princeton ) TBA

Vendredi 9 Janvier 2026, 12:00 à LPENS, L378 ENS-BIOPHYS (ENS Biophysics Seminar) physics.bio-ph
Ananyo Maitra ( LPTM Cergy ) TBA

Lundi 12 Janvier 2026, 11:00 à IPHT, Salle Claude Itzykson, Bât. 774 IPHT-STA (Séminaire de Physique Statistique, CEA/Saclay) physics
Sofia Flores Vector Resonant Relaxation and Statistical Closure Theory. II. One-loop Closure
Abstract: We use stellar dynamics as a testbed for statistical closure theory. We focus on the process of « Vector Resonant Relaxation, » a long-range, non-linear, and correlated relaxation mechanism that drives the reorientation of stellar orbital planes around a supermassive black hole. This process provides a natural setting to evaluate the predictive power of generic statistical closure schemes for dynamical correlation functions, in the fully non-linear and non-perturbative regime. We develop a numerical scheme that explicitly implements the seminal « Martin-Siggia-Rose » formalism at one-loop order via an iterative fixed-point approach, thereby improving upon the bare order from the « Direct Interaction Approximation. » Using this framework, we quantitatively validate the ability of the formalism to predict (i) the two-point two-time correlation function; (ii) the renormalised three-point interaction vertex; (iii) the three-point three-time correlation function. These predictions are compared to direct measurements from numerical simulations. We conclude by discussing the limitations of this approach and presenting possible future venues.

Mardi 13 Janvier 2026, 10:45 à LPTMC, campus Jussieu, couloir 12-13, 5ème étage, salle 5-23 SEM-LPTMC (Séminaire du Laboratoire de Physique Théorique de la Matière Condensée) cond-mat
Nils Caci ( LKB ) TBA

Mardi 13 Janvier 2026, 11:00 à IPHT, Amphi Claude Bloch, Bât. 774 IPHT-GEN (Séminaire général du SPhT)
Matthew Headrick ( Brandeis University ) TBA
Abstract: TBA

Mercredi 14 Janvier 2026, 11:00 à LPENS, L378 FORUM-ENS (Forum de Physique Statistique @ ENS) cond-mat.stat-mech
Friedrich Huebner TBA

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