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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260616T161500
DTEND;TZID=Europe/Berlin:20260616T161500
DTSTAMP:20260618T015453
CREATED:20260606T204650Z
LAST-MODIFIED:20260606T204650Z
UID:10000143-1781626500-1781626500@www.trr352.de
SUMMARY:On deriving a kinetic equation from many-body quantum dynamics
DESCRIPTION:Effectively describing the long-time dynamical behavior of quantum systems is a long-standing open problem. When the coupling constant λ of the interaction is small\, the dynamics of the system up to kinetic time t ~ λ -2 is conjectured to be effectively governed by the Boltzmann-Nordheim kinetic equation. In this talk\, we consider a system of weakly interacting lattice fermions at thermal equilibrium\, and I will describe how the two-point time correlation function of the system depends on the equilibrium solution of the Boltzmann-Nordheim equation. We approach the problem using a perturbation expansion and represent the appearing terms by Feynman diagrams. \nThis is joint work with Phan Thành Nam\, Herbert Spohn\, and Minh-Binh Tran.
URL:https://www.trr352.de/event/on-deriving-a-kinetic-equation-from-many-body-quantum-dynamics/
LOCATION:5606.02.011 (Konferenzraum)\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260616T160000
DTEND;TZID=Europe/Berlin:20260616T170000
DTSTAMP:20260618T015453
CREATED:20260614T203221Z
LAST-MODIFIED:20260614T203221Z
UID:10000147-1781625600-1781629200@www.trr352.de
SUMMARY:An introduction to non-local quantum computation
DESCRIPTION:In the setting of non-local quantum computation (NLQC)\, we study how multiple parties can implement channels on a distributed input system by making use of an entangled resource state\, local operations\, and a single round of communication.\nNon-local quantum computation was primarily studied as a means to understand the security of quantum position verification schemes\, but it is also related to information theoretic cryptography and the AdS/CFT correspondence.\nI will first give a basic introduction to the setting\, known connections to other fields and important results about NLQC. Afterwards\, i will talk about how we can study the relative hardness of different NLQC tasks by showing reductions between them.
URL:https://www.trr352.de/event/an-introduction-to-non-local-quantum-computation/
LOCATION:Seminar Room\, 4th floor\, Auf der Morgenstelle 10\, Tübingen\, 72076\, Germany
CATEGORIES:Junior Coffee Breaks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260615T141500
DTEND;TZID=Europe/Berlin:20260615T174500
DTSTAMP:20260618T015453
CREATED:20260610T211948Z
LAST-MODIFIED:20260614T202553Z
UID:10000144-1781532900-1781545500@www.trr352.de
SUMMARY:A Short Course on Exponential Integrators: Construction\, Analysis\, and Implementation for Time Dependent Partial Differential Equations
DESCRIPTION:COURSE OVERVIEW\nExponential integrators are powerful numerical methods for solving time-dependent partial differential equations. This short course introduces the construction\, analysis\, and efficient implementation of exponential integrators\, providing both theoretical foundations and practical insights. \nWe study linearization of semilinear and nonlinear evolution equations and develop modern exponential integration schemes. The course covers convergence theory and implementation issues\, in particular the efficient computation of matrix-function–vector products using Krylov subspace methods. \nThe course is based on the classical review by Hochbruck & Ostermann (2010) and will also address more recent developments. \n\nTOPICS\n\nLinearization of semilinear and nonlinear evolution equations\nExponential Runge–Kutta methods\nExponential Rosenbrock-type methods\nConvergence analysis and error estimates\nThe exponential Euler method – analysis and proof\nEfficient implementation of matrix-function–vector products\nKrylov subspace methods\nRecent developments beyond the review by Hochbruck & Ostermann (2010)\n\n\nSCHEDULE\nMonday\, June 1514:15 – 15:45 \nMonday\, June 1516:15 – 17:45 \nMonday\, June 2216:15 – 17:45 \n\nVENUE\nHörsaal 3 (HS 3)MI BuildingBoltzmannstr. 3TUM-Campus Garching \n\nINTENDED AUDIENCE\nGraduate students\, doctoral researchers\, and scientists interested in: \n\nNumerical analysis\nScientific computing\nDifferential equations\nComputational mathematics\n\n\nREFERENCE\nM. Hochbruck and A. Ostermann.Exponential Integrators.Acta Numerica\, 19:209–286\, 2010. \nhttps://doi.org/10.1017/S0962492910000048 \n\n\n\n\n\n\n\n\nPoster\nA Short Course on Exponential Integrators
URL:https://www.trr352.de/event/a-short-course-on-exponential-integrators-construction-analysis-and-implementation-for-time-dependent-partial-differential-equations/2026-06-15/
LOCATION:5606.EG.011 (MI Hörsaal 3)\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Mini Course
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260611T161500
DTEND;TZID=Europe/Berlin:20260611T161500
DTSTAMP:20260618T015453
CREATED:20260617T062037Z
LAST-MODIFIED:20260617T062037Z
UID:10000148-1781194500-1781194500@www.trr352.de
SUMMARY:Birth of a gap: critical phenomena in the normal matrix model
DESCRIPTION:We investigate a family of radially symmetric Coulomb gas systems at inverse\ntemperature \ncoming from the normal matrix model. The family is characterised by the\nproperty that the density of the equilibrium measure vanishes on a ring at\nradius \, which lies strictly inside the droplet. The large n expansion of\nthe free energy is obtained up to a novel term. Next\, we perform a scaling\nlimit of the correlation kernel at the scale and obtain a new limiting\nkernel in the bulk\, which differs from the well-known Ginibre kernel. \nJoint work with Matthias Allard based on arXiv:2509.24529
URL:https://www.trr352.de/event/birth-of-a-gap-critical-phenomena-in-the-normal-matrix-model/
LOCATION:5604.02.011 (Seminarraum)\, Boltzmannstr. 3\, Garching b. München\, 85748
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260609T160000
DTEND;TZID=Europe/Berlin:20260609T160000
DTSTAMP:20260618T015453
CREATED:20260617T062627Z
LAST-MODIFIED:20260617T062627Z
UID:10000149-1781020800-1781020800@www.trr352.de
SUMMARY:Three-body Hamiltonian for abelian anyons with zero-range interactions
DESCRIPTION:Anyons are 2d identical quantum particles with an intermediate exchange symmetry characterized by representations of the braid group. In the abelian case\, they can be modeled through the so-called magnetic representation\, namely as a system of bosons with an Aharonov-Bohm flux attached to each particle. In this talk\, I will discuss the construction of self-adjoint Hamiltonians\, different from the Friedrichs realization\, for a system of three abelian anyons. I will focus in particular on the Ter-Martirosyan-Skornyakov extensions. This family of Hamiltonians turns out to be parametrized by a suitable boundary operator; I will present a complete classification of its self-adjoint realizations and compute the negative spectrum for the specific case of interest. These results shed light on the possible occurrence of Thomas instability in the three-anyon model. Joint work with Michele Correggi (PoliMi) and Davide Fermi (PoliMi)
URL:https://www.trr352.de/event/three-body-hamiltonian-for-abelian-anyons-with-zero-range-interactions/
LOCATION:Room A 027\, Theresienstr. 37\, Munich\, 80333\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260520T161500
DTEND;TZID=Europe/Berlin:20260520T170000
DTSTAMP:20260618T015453
CREATED:20260617T063019Z
LAST-MODIFIED:20260617T063019Z
UID:10000151-1779293700-1779296400@www.trr352.de
SUMMARY:A framework to study twisted bilayer graphene in a tight binding model
DESCRIPTION:The study of the electronic properties of twisted bilayer graphene (TBG) has garnered much attention from the condensed matter community recently. TBG is obtained by stacking two graphene monolayers on top of each other\, and rotating one of them with respect to the other. Theoretical and experimental analyses have found that the electronic properties of TBG depend very strongly on the angle between the layers. In fact\, a handful of “magic” angles have been predicted at which TBG becomes a superconductor\, and this has even been verified experimentally. \nThe model commonly used to study TBG is an effective one\, and was derived by Bistritzer and MacDonald. In this talk\, I will present recent results on developing a framework to study TBG from first principles. To be more exact\, we consider a tight-binding model for the electrons\, but make no further approximations. Using a renormalization group technique\, we construct a perturbative expansion to study TBG that is convergent when the twisting angle satisfies certain diophantine conditions. This is joint work with V. Mastropietro.
URL:https://www.trr352.de/event/a-framework-to-study-twisted-bilayer-graphene-in-a-tight-binding-model/
LOCATION:Room A 027\, Theresienstr. 37\, Munich\, 80333\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260519T161500
DTEND;TZID=Europe/Berlin:20260519T161500
DTSTAMP:20260618T015453
CREATED:20260606T204336Z
LAST-MODIFIED:20260606T204410Z
UID:10000142-1779207300-1779207300@www.trr352.de
SUMMARY:The liquid-vapor phase transition in a system with a finite but coarse-grained attraction
DESCRIPTION:The standard approach to studying the liquid-vapor phase transition uses the Maxwell double-tangent construction. Whereas this construction is easily justified physically\, deriving it mathematically has proved to be more difficult. In 1966\, Lebowitz and Penrose proved the Maxwell construction in a mean field model\, where the particles interact via a hard-core repulsion\, and an infinite range\, infinitely weak attraction. Generalizing their result to finite pair attractions remains an open problem. \nIn this talk\, I will discuss a proof of the existence of a liquid-vapor phase transition in a system with an attraction that is finite\, but is also coarse-grained. More precisely\, we split up space into mesoscopic boxes\, and define an attraction that ignores the location of the particles within each box. Defined in this way\, our model is reflection positive\, which allows us to prove the existence of a liquid-vapor phase transition. \nThis is joint work with Qidong He\, Joel L. Lebowitz\, and Ron Peled.
URL:https://www.trr352.de/event/the-liquid-vapor-phase-transition-in-a-system-with-a-finite-but-coarse-grained-attraction/
LOCATION:Room 5608.02.020 (Seminarraum (M11))\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260511T160000
DTEND;TZID=Europe/Berlin:20260511T170000
DTSTAMP:20260618T015453
CREATED:20260422T191046Z
LAST-MODIFIED:20260422T191046Z
UID:10000135-1778515200-1778518800@www.trr352.de
SUMMARY:Stable matrix product state simulations with BUGs
DESCRIPTION:Tensor networks have become a standard computational tool for simulating quantum many-body dynamics. Their time evolution requires the efficient and accurate update of low-rank tensor factors. In recent years\, several new numerical schemes have been proposed for this task. All these methods can be understood within the unified framework of Basis Update and Galerkin (BUG) integrators\, in which the basis matrices are evolved by low-dimensional matrix differential equations\, while the core tensors are updated through a Galerkin projection step. \nWe begin with an introduction to matrix product states\, also known as tensor trains in the mathematical literature. Further\, it will introduce the basic ideas behind the BUG integrator. Particular emphasis will be placed on their remarkable properties like rank-adaptivity\, parallelism and the preservation of physical invariants such as norm and energy. Numerical experiments from quantum physics will demonstrate the theoretical results and explore the potential of BUG integrators for large-scale many-body quantum systems.
URL:https://www.trr352.de/event/stable-matrix-product-state-simulations-with-bugs/
LOCATION:Room 5612.03.020 (Besprechungsraum)\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Junior Coffee Breaks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260508T163000
DTEND;TZID=Europe/Berlin:20260508T163000
DTSTAMP:20260618T015453
CREATED:20260426T173257Z
LAST-MODIFIED:20260426T173257Z
UID:10000139-1778257800-1778257800@www.trr352.de
SUMMARY:Mixing times of liftings of the Totally Asymmetric Simple Exclusion Process (Probability Colloquium Augsburg-Munich)
DESCRIPTION:Under suitable assumptions\, a Markov chain will converge at large times to its stationary measure\, over a time scale known as the mixing time. Markov chains can then be used to approximately sample from a complex distribution\, which is the principle underlying Markov Chain Monte Carlo techniques. In this context\, there has been strong interest both in the physics and the mathematics literature in lifting Markov chains\, which is a way to modify an initial Markov chain so that that the lifted Markov chain converges faster to its stationary measure. We study a particle system which is both a lifting of the TASEP (Totally Asymmetric Simple Exclusion Process) and a periodic instance of self-repelling random walks. Using a graphical representation\, we identify a coupling time with some delay\, which allows us to study two notions of mixing times of the model. For the standard notion of mixing time\, we show that the model does not converge abruptly to stationarity\, whereas for a mixing time associated with an average of the distribution over the last few steps\, convergence to stationarity is abrupt\, which is known as the cutoff phenomenon.
URL:https://www.trr352.de/event/mixing-times-of-liftings-of-the-totally-asymmetric-simple-exclusion-process-probability-colloquium-augsburg-munich/
LOCATION:University of Augsburg\, Room 2004 (L1)\, Universitätsstraße 14\, Augsburg\, 86159
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260508T150000
DTEND;TZID=Europe/Berlin:20260508T150000
DTSTAMP:20260618T015453
CREATED:20260426T173058Z
LAST-MODIFIED:20260426T173125Z
UID:10000138-1778252400-1778252400@www.trr352.de
SUMMARY:Limit processes for KPZ models with flat initial conditions (Probability Colloquium Augsburg-Munich)
DESCRIPTION:We consider stochastic growth models in the Kardar-Parisi-Zhang universality class\, like the asymmetric simple exclusion process or the last passage percolation. We will give an overview of older and recent results on the limit process and its properties for KPZ growth models with flat initial conditions\, ranging from regularity\, decorrelation in space and time\, to the persistence probability of the limit processes.
URL:https://www.trr352.de/event/limit-processes-for-kpz-models-with-flat-initial-conditions-probability-colloquium-augsburg-munich/
LOCATION:University of Augsburg\, Room 2004 (L1)\, Universitätsstraße 14\, Augsburg\, 86159
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260506T161500
DTEND;TZID=Europe/Berlin:20260506T171500
DTSTAMP:20260618T015453
CREATED:20260617T062841Z
LAST-MODIFIED:20260617T062841Z
UID:10000150-1778084100-1778087700@www.trr352.de
SUMMARY:Global Self-Similar solutions\, Breakdown of Asymptotic Completeness-New Physics?
DESCRIPTION:For Schrödinger-type equations with time-dependent\, spatially local interactions — including nonlinear cases — there exist solutions that are neither localized nor scattering. These solutions exhibit sub-ballistic spreading\, yet are global\, asymptotically stable\, and transport mass (the L^2-norm) to infinity. I will describe the construction of such self-similar solutions and discuss some of their physical implications.
URL:https://www.trr352.de/event/global-self-similar-solutions-breakdown-of-asymptotic-completeness-new-physics/
LOCATION:Room A 027\, Theresienstr. 37\, Munich\, 80333\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260505T161500
DTEND;TZID=Europe/Berlin:20260505T161500
DTSTAMP:20260618T015453
CREATED:20260606T204227Z
LAST-MODIFIED:20260606T204227Z
UID:10000141-1777997700-1777997700@www.trr352.de
SUMMARY:From Scattering to Local Decay: The case of Time Dependent Potentials and Nonlinear Equations
DESCRIPTION:I will describe the new approach to scattering theory\, which extends to time dependent potentials\, including nonlinear equations. In particular\, recent progress for one dimensional cases\, Long-Range scattering and Local-Decay estimates.
URL:https://www.trr352.de/event/from-scattering-to-local-decay-the-case-of-time-dependent-potentials-and-nonlinear-equations/
LOCATION:Room 5608.02.020 (Seminarraum (M11))\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260428T160000
DTEND;TZID=Europe/Berlin:20260428T170000
DTSTAMP:20260618T015453
CREATED:20260606T203923Z
LAST-MODIFIED:20260606T203923Z
UID:10000140-1777392000-1777395600@www.trr352.de
SUMMARY:Classical comparison theorem for the gap of the Davies Lindbladian for qLDPC codes nur online
DESCRIPTION:In this talk\, I will describe some work in progress about relating the low-lying spectrum of the Davies Lindbladian for qLDPC codes to that of Glauber dynamics on a classical model.
URL:https://www.trr352.de/event/classical-comparison-theorem-for-the-gap-of-the-davies-lindbladian-for-qldpc-codes-nur-online/
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260422T160000
DTEND;TZID=Europe/Berlin:20260422T160000
DTSTAMP:20260618T015453
CREATED:20260423T201931Z
LAST-MODIFIED:20260423T201931Z
UID:10000136-1776873600-1776873600@www.trr352.de
SUMMARY:Extrapolation methods for Γ-convergence and applications to image processing
DESCRIPTION:
URL:https://www.trr352.de/event/extrapolation-methods-for-%ce%b3-convergence-and-applications-to-image-processing/
LOCATION:Room A 027\, Theresienstr. 37\, Munich\, 80333\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260421T161500
DTEND;TZID=Europe/Berlin:20260421T161500
DTSTAMP:20260618T015453
CREATED:20260426T152752Z
LAST-MODIFIED:20260426T152752Z
UID:10000137-1776788100-1776788100@www.trr352.de
SUMMARY:Rapid thermalization of lattice CSS codes
DESCRIPTION:Calderbank-Shor-Steane (CSS) codes\, such as the toric code\, are a widely studied class of quantum error-correcting codes. Understanding the thermalization time of these systems is important not only for error correction but also for applications like Gibbs sampling. \nWe show that CSS codes on a lattice satisfy a modified logarithmic Sobolev inequality and thus thermalize rapidly in any dimension at sufficiently high temperatures. For a special subclass\, including the toric code\, this rapid thermalization even holds at all positive temperatures. The central idea underlying our approach is to exploit the structure of CSS codes to decompose a quantity into two simpler\, (almost) classical components\, allowing us to apply tools from classical statistical mechanics to analyze the thermalization. In the last part I will show how this method generalizes to 2D Abelian quantum double models. \nThis is joint work with Ángela Capel\, Li Gao\, Angelo Lucia\, David Pérez-García\, Antonio Pérez-Hernández\, Cambyse Rouzé and Simone Warzel.
URL:https://www.trr352.de/event/rapid-thermalization-of-lattice-css-codes/
LOCATION:Room 5608.02.020 (Seminarraum (M11))\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260309T000000
DTEND;TZID=Europe/Berlin:20260313T235959
DTSTAMP:20260618T015453
CREATED:20250404T183701Z
LAST-MODIFIED:20260117T132920Z
UID:10000010-1773014400-1773446399@www.trr352.de
SUMMARY:TRR 352 Winter School on Mathematical Physics
DESCRIPTION:Registration for the TRR 352 Winter School on Mathematical Physics is now open!\nThe event will take place from March 9-13\, 2026\, at the Georg-von-Vollmar-Akademie in Kochel am See. \nInvited speakers: \n\nEmanuela L. Giacomelli (University of Milan)\nVojkan Jaksic (Politecnico di Milano)\nBenjamin Schlein (University of Zurich)\nKatharina Schratz (Sorbonne University)\n\nParticipation is free of charge\, but registration is mandatory. Please register by February 8\, 2026. \nTo access more details and the registration form\, please visit our website:\nhttps://sites.google.com/view/trr352winterschool26/home
URL:https://www.trr352.de/event/trr-352-winter-school-on-mathematical-physics/
LOCATION:Georg-von-Vollmar-Akademie\, Am Aspensteinbichl 9\, Kochel am See\, 82431\, Germany
CATEGORIES:Schools
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260209T160000
DTEND;TZID=Europe/Berlin:20260209T160000
DTSTAMP:20260618T015453
CREATED:20251223T121749Z
LAST-MODIFIED:20260129T191257Z
UID:10000125-1770652800-1770652800@www.trr352.de
SUMMARY:A probabilistic approach to BEC
DESCRIPTION:A gas of interacting Bosons can be represented using an ensemble of stochastic diffusions – a Brownian loop soup. In this talk\, we review the construction of this Feynman representation\, its representation of Free Energy and the 1-PRDM. We also introduce some results from the literature in the dilute and other regimes and state some conjectures.
URL:https://www.trr352.de/event/a-probabilistic-approach-to-bec/
LOCATION:Room 5612.EG.019 (CIT Sitzungsraum 2)\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Junior Coffee Breaks
ORGANIZER;CN="Quirin Vogel":MAILTO:Quirin.Vogel@aau.at
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260122T190000
DTEND;TZID=Europe/Berlin:20260122T190000
DTSTAMP:20260618T015453
CREATED:20260122T202110Z
LAST-MODIFIED:20260122T202110Z
UID:10000132-1769108400-1769108400@www.trr352.de
SUMMARY:Semi-classical limit of a trapped dilute Fermi gas
DESCRIPTION:
URL:https://www.trr352.de/event/semi-classical-limit-of-a-trapped-dilute-fermi-gas/
LOCATION:Room A 027\, Theresienstr. 37\, Munich\, 80333\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260122T180000
DTEND;TZID=Europe/Berlin:20260122T180000
DTSTAMP:20260618T015453
CREATED:20260122T202030Z
LAST-MODIFIED:20260122T202030Z
UID:10000131-1769104800-1769104800@www.trr352.de
SUMMARY:A Pohozaev identity for the Spectral Fractional Laplacian
DESCRIPTION:
URL:https://www.trr352.de/event/a-pohozaev-identity-for-the-spectral-fractional-laplacian/
LOCATION:Room A 027\, Theresienstr. 37\, Munich\, 80333\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260120T150000
DTEND;TZID=Europe/Berlin:20260120T150000
DTSTAMP:20260618T015453
CREATED:20260117T130818Z
LAST-MODIFIED:20260117T131351Z
UID:10000127-1768921200-1768921200@www.trr352.de
SUMMARY:On the asymptotic behavior at the kinetic time of a weakly interacting Fermi gas
DESCRIPTION:Describing the long-time dynamical behaviour of quantum systems is a long-standing open problem. \nWhen the coupling constant  of the interaction is small\, the dynamics of the system up to kinetic time  is conjectured to be effectively governed by the Boltzmann-Nordheim kinetic equation. \nIn this talk\, I will present a result on the two-point time correlation function of a system of lattice fermions at thermal equilibrium\, and I will explain how to approach the problem using a perturbation expansion and representing the appearing terms by Feynman diagrams. \nThis is joint work with Phan Thành Nam\, Herbert Spohn\, and Minh-Binh Tran.
URL:https://www.trr352.de/event/on-the-asymptotic-behavior-at-the-kinetic-time-of-a-weakly-interacting-fermi-gas/
LOCATION:Room B 349\, Theresienstr. 39\, Munich\, 80333\, Germany
CATEGORIES:Junior Coffee Breaks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260114T180000
DTEND;TZID=Europe/Berlin:20260114T180000
DTSTAMP:20260618T015453
CREATED:20260111T195018Z
LAST-MODIFIED:20260111T195018Z
UID:10000126-1768413600-1768413600@www.trr352.de
SUMMARY:Bound states of the Pauli operator in two dimensions - weak coupling asymptotics and CLR-type inequalities
DESCRIPTION:
URL:https://www.trr352.de/event/bound-states-of-the-pauli-operator-in-two-dimensions-weak-coupling-asymptotics-and-clr-type-inequalities/
LOCATION:Room A 027\, Theresienstr. 37\, Munich\, 80333\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260108T160000
DTEND;TZID=Europe/Berlin:20260108T160000
DTSTAMP:20260618T015453
CREATED:20260122T201802Z
LAST-MODIFIED:20260122T201808Z
UID:10000130-1767888000-1767888000@www.trr352.de
SUMMARY:Scattering Quantum Walks on Graphs
DESCRIPTION:We consider a class of Unitary Quantum Walks on arbitrary graphs\, parameterized by a family of scattering matrices. \nAfter explaining that these Scattering Quantum Walks encompass several known Quantum Walks\, we further introduce two classes of Scattering Open Quantum Walks on arbitrary graphs based on that construction\, whose asymptotic states we discuss.
URL:https://www.trr352.de/event/scattering-quantum-walks-on-graphs/
LOCATION:Room 5610.EG.011 (CIT Sitzungsraum 1)\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251215T160000
DTEND;TZID=Europe/Berlin:20251215T160000
DTSTAMP:20260618T015453
CREATED:20260117T132056Z
LAST-MODIFIED:20260117T132056Z
UID:10000128-1765814400-1765814400@www.trr352.de
SUMMARY:Validity of Kubo formula for 1d and quasi-1d lattice fermionic systems
DESCRIPTION:We study the dynamical density and current responses of a class of non-interacting\, one-dimensional gapless lattice Fermi systems subjected to density-type perturbations slowly varying in space and time\, in the infinite-volume and zero-temperature limit. In addition\, we analyse the edge density and current responses for quantum Hall lattice systems defined on a cylindrical geometry. \nWe establish the validity of linear response for these observables\, thereby providing a justification of Kubo’s formula. The latter is computed explicitly in terms of the spectral properties at the Fermi points and the profile of the perturbation. \nThe proof of linear response validity on the relevant time scales is based on a detailed analysis of the imaginary-time Duhamel expansion. A crucial ingredient is a cancellation mechanism in the scaling limit of higher-order correlation functions that describe the nonlinear part of the response. \nJoint work with Marcello Porta.
URL:https://www.trr352.de/event/validity-of-kubo-formula-for-1d-and-quasi-1d-lattice-fermionic-systems/
LOCATION:Seminar Room\, 4th floor\, Auf der Morgenstelle 10\, Tübingen\, 72076\, Germany
CATEGORIES:Junior Coffee Breaks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251212T143000
DTEND;TZID=Europe/Berlin:20251212T180000
DTSTAMP:20260618T015453
CREATED:20251202T201643Z
LAST-MODIFIED:20251202T201643Z
UID:10000123-1765549800-1765562400@www.trr352.de
SUMMARY:Probability Colloquium Augsburg-Munich
DESCRIPTION:Schedule:\n\n14:30    Welcome\n15:00    Talk by   Nicos Georgiou (Sussex)\n16:00    Coffee break\n16:30    Talk by  Christian Kühn (TU Munich)\n18:00    Option for common dinner\n\n  \n\nTitles and abstracts:\nNicos Georgiou: Mean-field limit and parameter estimation for contagion dynamics on higher-order structures \nClassical models of contagion epidemics have graph based representations where the nodes represent the population and infections occur from an infected individual to a susceptible individual via a network link between them. At the same time\, healing mechanisms try to fight the epidemic at node level. The simple descriptions of these representations also underscore their limitations\, since the propagation of contagions in complex systems often involves repeated or simultaneous stimuli that individuals receive from their social contacts (such as their work or household). One may mechanistically encode these non-linear effects into contagion models by considering interactions that go beyond simple pairwise connections\, by using hypergraphs rather than graphs. In this talk we will see the role higher-order interactions can play in the behaviour of the model when a rigorous mean-field can be obtained. Furthermore\, we will discuss some inference techniques for the parameters of the epidemic (rates of infection) when only partial information on the type of infection is available and with only a single realisation of the epidemic curve as a datum. \n  \nChristian Kühn: Epidemic Dynamics: From Simple Models to Complex Systems \nIn this talk\, I am going to give an overview of various techniques to analyze contact processes and their nonlinear dynamics with a focus on moment-based methods. The main results will be (a) the existence of periodic motion in systems with waning immunity\, (b) warning signs for outbreaks in adaptive epidemic models with social distancing and quarantining\, (c) the influence of transport in multiplex networks\, and (d) the influence of multiscale group interactions to prevent epidemics. We shall also see how to locally justify moment closure expansions of the dynamics.
URL:https://www.trr352.de/event/probability-colloquium-augsburg-munich-2/
LOCATION:University of Augsburg\, Room 2004 (L1)\, Universitätsstraße 14\, Augsburg\, 86159
CATEGORIES:Colloquia
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251210T170000
DTEND;TZID=Europe/Berlin:20251210T170000
DTSTAMP:20260618T015453
CREATED:20260117T132305Z
LAST-MODIFIED:20260117T132305Z
UID:10000129-1765386000-1765386000@www.trr352.de
SUMMARY:The Widom-Sobolev formula for the free Dirac operator
DESCRIPTION:With the proof of Widom’s conjecture giving new insights on the entanglement properties of the non-relativistic free Fermi gas\, it is a natural question whether this situation extends to the relativistic case\, where the single-particle Hamiltonian is given by the free Dirac operator. \nIn this talk I give a brief introduction to both the Widom-Sobolev formula as well as the free Dirac operator\, and give an answer to the question above. I also talk about the strategy of the proof of this result\, in particular I show how it can be reduced to an application of another result from my PhD thesis\, a Widom-Sobolev formula for more general matrix-valued symbols. \nThe presented results were obtained in collaboration with Peter Müller.
URL:https://www.trr352.de/event/the-widom-sobolev-formula-for-the-free-dirac-operator/
LOCATION:Room B 349\, Theresienstr. 39\, Munich\, 80333\, Germany
CATEGORIES:Junior Coffee Breaks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251208T000000
DTEND;TZID=Europe/Berlin:20251212T235959
DTSTAMP:20260618T015453
CREATED:20250904T100216Z
LAST-MODIFIED:20250904T103701Z
UID:10000116-1765152000-1765583999@www.trr352.de
SUMMARY:Emergent phenomena in many-body quantum systems
DESCRIPTION:The microscopic laws of quantum mechanics give rise to some of the most fascinating macroscopic phenomena in physics\, such as superfluidity and superconductivity. The theoretical description of such phenomena is intimately linked with beautiful mathematics in fields like functional analysis\, partial differential equations\, or probability. This conference brings together internationally recognised experts in mathematical physics to report on recent developments and exchange new ideas. The meeting will provide opportunities for early-career researchers to present their work and initiate new collaborations\, thus ensuring the future dynamism of the field.
URL:https://www.trr352.de/event/emergent-phenomena-in-many-body-quantum-systems/
LOCATION:Centre International de Rencontres Mathématiques (CIRM)\, 163 Av. de Luminy\, Marseille\, 13009\, France
CATEGORIES:Workshops/Conferences
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251124T000000
DTEND;TZID=Europe/Berlin:20251128T235959
DTSTAMP:20260618T015453
CREATED:20250404T153159Z
LAST-MODIFIED:20251223T120302Z
UID:10000005-1763942400-1764374399@www.trr352.de
SUMMARY:Quantum many-body systems and Bose-Einstein condensation: A Mathematical Physics Perspective
DESCRIPTION:
URL:https://www.trr352.de/event/quantum-many-body-systems-and-bose-einstein-condensation-a-mathematical-physics-perspective/
LOCATION:Erwin Schrödinger International Institute for Mathematics and Physics (ESI)\, Boltzmanngasse 9A\, Vienna\, 1090\, Austria
CATEGORIES:Workshops/Conferences
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251119T161500
DTEND;TZID=Europe/Berlin:20251119T161500
DTSTAMP:20260618T015453
CREATED:20251202T201902Z
LAST-MODIFIED:20251202T201902Z
UID:10000124-1763568900-1763568900@www.trr352.de
SUMMARY:(Semi) Relativistic (Semi) Classical PDE (around) the Self-Consistent Pauli Equation
DESCRIPTION:We present the relativistic quantum physics model hierarchy from Dirac-Maxwell to Vlasov/Euler-Poisson that models fast moving charges and their self-consistent electro-magnetic field. Our main interest is (asymptotic) analysis of these nonlinear time-dependent PDE\, with focus on the Pauli-Poisswell/Darwin system which is the consistent model at first/second order in 1/c (c = speed of light) that keeps both relativistic effects “spin” and “magnetism”. Emphasis is on the (semi)classicial limit for vanishing Planck constant. We use both WKB methods and Wigner functions where we extend the 1993 results of P. L. Lions & Paul and Markowich & Mauser on the limit from Schrödinger-Poisson to Vlasov-Poisson\, with similar subtilities of pure quantum states vs mixed states. In the hope of taming the mathematical complications stemming from the magnetic field\, we are interested also in developing “quantum/semiclassical velocity averaging lemmata” building on the 1988 ideas of Golse\, Perthame\, Sentis and P.L.Lions. This talk aims to explain the models\, the new results & ideas of proofs/techniques\, as worked out in joint works mainly with Jakob Möller (X) and also Pierre Germain (ICL)\, Changhe Yang (Caltech)\, François Golse (X).
URL:https://www.trr352.de/event/semi-relativistic-semi-classical-pde-around-the-self-consistent-pauli-equation/
LOCATION:Room 5610.EG.011 (CIT Sitzungsraum 1)\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251117T000000
DTEND;TZID=Europe/Berlin:20251121T235959
DTSTAMP:20260618T015453
CREATED:20250707T135912Z
LAST-MODIFIED:20260126T211517Z
UID:10000114-1763337600-1763769599@www.trr352.de
SUMMARY:Junior Meeting
DESCRIPTION:November 17-21\, 2025 at Haus Chiemgau\, Teisendorf\n \nThe meeting will begin on Monday at 3 pm and conclude on Friday after lunch. \nSpeakers: \nLennart Becker (UT)\nYoon Jun Chan (UA)\nEddy de Leon (TUM)\nJorge Acuña Flores (UT)\nPaul Pfeiffer (LMU)\nSebstian Stengele (TUM)\nCornelia Vogel (LMU) \nProgram: \nSchedule Junior Meeting Nov. 25\nAbstracts Junior Meeting Nov. 25\nNovember 20: Full-Day Theatre Skills Workshop Junior Meeting Nov. 25\n\nOrganizers: \nFlorian Haberberger (LMU Munich)\nEmilio Onorati (TUM)\nBarbara Roos (Tübingen University)\nCarla Rubiliani (Tübingen University)\nSeverin Schraven (TUM)\nFrançois Visconti (LMU Munich) \n\nVenue: \nHaus Chiemgau\nDechantshof 3\n83317 Teisendorf \nweb: www.haus-chiemgau.de\nphone: +49 (0) 8666 98590 \nHow to get there: \nYou can reach Teisendorf by train.\nHaus Chiemgau is only a few minutes’ walk from the station.
URL:https://www.trr352.de/event/junior-meeting-3/
LOCATION:Haus Chiemgau\, Dechantshof 3\, Teisendorf\, 83317\, Germany
CATEGORIES:Retreats
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251105T180000
DTEND;TZID=Europe/Berlin:20251105T180000
DTSTAMP:20260618T015453
CREATED:20251202T201456Z
LAST-MODIFIED:20251202T201456Z
UID:10000122-1762365600-1762365600@www.trr352.de
SUMMARY:Unified approach to Strichartz estimates for orthonormal functions
DESCRIPTION:
URL:https://www.trr352.de/event/unified-approach-to-strichartz-estimates-for-orthonormal-functions/
LOCATION:Room A 027\, Theresienstr. 37\, Munich\, 80333\, Germany
CATEGORIES:Talks
END:VEVENT
END:VCALENDAR