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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250121T000000
DTEND;TZID=Europe/Berlin:20250124T235959
DTSTAMP:20260504T055329
CREATED:20250707T135744Z
LAST-MODIFIED:20260129T194533Z
UID:10000113-1737417600-1737763199@www.trr352.de
SUMMARY:Junior Meeting
DESCRIPTION:January 21-24\, 2025 at Christkönigshaus\, Stuttgart \n \n  \n\nSpeakers: \nJonas Peteranderl (LMU)\nSara Terveer (LMU)\nFrançois Visconti (LMU)\nPaul Gondolf (Tub)\nYifei Li (Tub)\nTom Wessel (Tub)\nPablo Costa Rico (TUM)\nCorlie Rall (TUM)\nAnouar Kouraich (TUM)\nBeatriz Dias (TUM)\nYifan Jia (Copenhagen) \nProgram:\n \nSchedule Junior Meeting 25\nAbstracts Junior Meeting Jan 25\nWorkshop Time-Management\n  \n \n  \n \n  \nOrganizers: \nAlberto Brollo (TUM)\nEmanuela Giacomelli (LMU Munich)\nFlorian Haberberger (LMU Munich)\nEmilio Onorati (TUM)\nCarla Rubiliani (Tübingen University)\nOliver Siebert (Tübingen University) \n\nVenue: \nChristkönigshaus\nParacelsusstraße 89\n70599 Stuttgart\nTelefon 0711 458 282-3 \nHow to get there: \nhttps://www.christkoenigshaus.de/meta/anreise.html
URL:http://www.trr352.de/event/junior-meeting-2/
LOCATION:Christkönigshaus\, Paracelsusstraße 89\, Stuttgart\, 70599\, Germany
CATEGORIES:Retreats
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250121T161500
DTEND;TZID=Europe/Berlin:20250121T161500
DTSTAMP:20260504T055329
CREATED:20250703T141055Z
LAST-MODIFIED:20250703T141055Z
UID:10000047-1737476100-1737476100@www.trr352.de
SUMMARY:Zigzag strategy for random matrices
DESCRIPTION:It is a remarkable property of random matrices\, that their resolvents tend to concentrate around a deterministic matrix as the dimension of the matrix tends to infinity\, even for a small imaginary part of the involved spectral parameter. These estimates are called local laws and they are the cornerstone in most of the recent results in random matrix theory. In this talk\, I will present a novel method of proving single-resolvent and multi-resolvent local laws for random matrices\, the Zigzag strategy\, which is a recursive tandem of the characteristic flow method and a Green function comparison argument. Novel results\, which we obtained via the Zigzag strategy\, include the optimal Eigenstate Thermalization Hypothesis (ETH) for Wigner matrices\, uniformly in the spectrum\, and universality of eigenvalue statistics at cusp singularities for correlated random matrices.\nBased on joint works with G. Cipolloni\, L. Erdös\, O. Kolupaiev\, and V. Riabov.
URL:http://www.trr352.de/event/zigzag-strategy-for-random-matrices/
LOCATION:Room 5608.03.011 (Seminarraum (M1/M7))\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250124T143000
DTEND;TZID=Europe/Berlin:20250124T143000
DTSTAMP:20260504T055329
CREATED:20250703T130425Z
LAST-MODIFIED:20250703T130425Z
UID:10000045-1737729000-1737729000@www.trr352.de
SUMMARY:Dimensional Phase Transition in Random Walk Loop Soup
DESCRIPTION:We consider a system of closed random walk trajectories interacting by mutual repulsion. This probabilistic model is motivated by its connections to statistical mechanics models\, such as the Bose gas\, the double dimer model\, or the spin O(N) model. We prove the occurrence of macroscopic loops in dimension d>2 (joint with A. Quitmann\, 2022) and the absence of macroscopic loops in dimension d=2 (joint with W. Wu\, 2024). The talk will primarily focus on the two-dimensional case\, which is analyzed using a novel complex spin representation and the derivation of a Mermin-Wagner theorem for complex measures.
URL:http://www.trr352.de/event/dimensional-phase-transition-in-random-walk-loop-soup/
LOCATION:University of Augsburg\, Room 2004 (L1)\, Universitätsstraße 14\, Augsburg\, 86159
CATEGORIES:Talks
ORGANIZER;CN="Prof. Lorenzo Taggi":MAILTO:lorenzo.taggi@uniroma1.it
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250124T143000
DTEND;TZID=Europe/Berlin:20250124T143000
DTSTAMP:20260504T055329
CREATED:20250703T130603Z
LAST-MODIFIED:20250703T130603Z
UID:10000046-1737729000-1737729000@www.trr352.de
SUMMARY:Dynamical Gibbs variational principles for irreversible interacting particle systems with applications to attractor properties
DESCRIPTION:In this talk\, we consider irreversible translation-invariant interacting particle systems on the d-dimensional hypercubic lattice with finite local state space\, which admit at least one Gibbs measure as a time-stationary measure. Under some mild degeneracy conditions on the rates and the specification we prove\, that zero relative entropy loss of a translation-invariant measure implies\, that the measure is Gibbs with respect to the same specification as the time-stationary Gibbs measure. As an application\, we obtain the attractor property for irreversible interacting particle systems\, which says that any weak limit point of any trajectory of translation-invariant measures is a Gibbs measure with respect to the same specification as the time-stationary measure. This extends previously known results to fairly general irreversible interacting particle systems and joined work with Jonas Köppl.
URL:http://www.trr352.de/event/dynamical-gibbs-variational-principles-for-irreversible-interacting-particle-systems-with-applications-to-attractor-properties/
LOCATION:University of Augsburg\, Room 2004 (L1)\, Universitätsstraße 14\, Augsburg\, 86159
CATEGORIES:Talks
ORGANIZER;CN="Prof. Dr. Benedikt Jahnel":MAILTO:Benedikt.Jahnel@tu-braunschweig.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250129T180000
DTEND;TZID=Europe/Berlin:20250129T180000
DTSTAMP:20260504T055329
CREATED:20250703T130235Z
LAST-MODIFIED:20250703T130235Z
UID:10000044-1738173600-1738173600@www.trr352.de
SUMMARY:Estimates on the nodal set of Dirac equations
DESCRIPTION:
URL:http://www.trr352.de/event/estimates-on-the-nodal-set-of-dirac-equations/
LOCATION:Room A 027\, Theresienstr. 37\, Munich\, 80333\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250205T121500
DTEND;TZID=Europe/Berlin:20250205T121500
DTSTAMP:20260504T055329
CREATED:20250404T163259Z
LAST-MODIFIED:20250404T163614Z
UID:10000007-1738757700-1738757700@www.trr352.de
SUMMARY:From tensor networks to Frobenius Schur indicators: some applications of state-sum models with boundaries
DESCRIPTION:State-sum constructions have numerous applications in both mathematics and physics. In mathematics\, they yield invariants for knots and manifolds and serve as a powerful organizing principle in representation theory. To illustrate this principle\, we discuss equivariant Frobenius-Schur indicators. In the context of physics\, we explain how state-sum models offer a conceptual framework for tensor network models\, based on collaboration with Fuchs\, Haegeman\, Lootens\, and Verstraete.
URL:http://www.trr352.de/event/from-tensor-networks-to-frobenius-schur-indicators-some-applications-of-state-sum-models-with-boundaries/
LOCATION:Room HS3 (MI 00.06.011)\, Boltzmannstr. 3\, Garching Forschungszentrum\, 85748\, Germany
CATEGORIES:Talks
ORGANIZER;CN="Prof. Dr. Christoph Schweigert":MAILTO:christoph.schweigert@uni-hamburg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250206T121500
DTEND;TZID=Europe/Berlin:20250206T150000
DTSTAMP:20260504T055329
CREATED:20250403T182452Z
LAST-MODIFIED:20250507T064024Z
UID:10000004-1738844100-1738854000@www.trr352.de
SUMMARY:On the error analysis of full discretizations of Friedrichs' systems
DESCRIPTION:In this talk\, we address the full discretization of Friedrichs’ systems with a two-field structure\, such as Maxwell’s equations or the acoustic wave equation in div-grad form. \nWe follow a method of lines approach\, where we first discretize in space via the discontinuous Galerkin method. Subsequently\, we consider different second-order schemes for time integration\, namely the Crank–Nicolson scheme\, the leapfrog scheme\, and a general class of local time integration methods which comprises a locally implicit and a new local time-stepping scheme. We show the stability of the fully discrete schemes (subject to an appropriate CFL condition where necessary) and error bounds that are optimal in space and time and robust under mesh refinement. These bounds are derived within a unified error analysis based on the fact that all schemes can be interpreted as perturbations of the Crank–Nicolson scheme. \nWe conclude with numerical experiments in which we compare different local time integration methods for Maxwell’s equations. \nThis is joint work with Malik Scheifinger\, KIT \nFunded by the Deutsche Forschungsgemeinschaft (DFG\, German Research Foundation) – Project-ID 258734477 – SFB 1173
URL:http://www.trr352.de/event/on-the-error-analysis-of-full-discretizations-of-friedrichs-systems/
LOCATION:Room 03.10.011\, Boltzmannstr. 3\, Garching Forschungszentrum\, 85748\, Germany
CATEGORIES:Talks
ORGANIZER;CN="Prof. Dr. Marlis Hochbruck":MAILTO:marlis.hochbruck@kit.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250213T161500
DTEND;TZID=Europe/Berlin:20250213T161500
DTSTAMP:20260504T055329
CREATED:20250707T133135Z
LAST-MODIFIED:20250829T140603Z
UID:10000105-1739463300-1739463300@www.trr352.de
SUMMARY:The Mathematics of Locality in Many-Body Quantum Systems
DESCRIPTION:In relativity\, nothing can travel faster than the speed of light. But there are often emergent speed limits\, such as the speed of sound\, that limit practical information transfer. In quantum many-body lattice models\, the existence of this emergent speed limit was first proved by Lieb and Robinson in 1972. Over 50 years later\, their result has formed the backbone of very important results in mathematical physics. I will present a modern perspective on the Lieb-Robinson Theorem and present a selection of its applications\, such as: constraining the time to prepare entangled states\, the simulatability of quantum physics on classical computers\, and the decay of the false vacuum in metastable quantum states.
URL:http://www.trr352.de/event/the-mathematics-of-locality-in-many-body-quantum-systems/
LOCATION:Room C3N14\, Auf der Morgenstelle 10\, Tübingen\, 72076\, Germany
CATEGORIES:Colloquia
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250219T000000
DTEND;TZID=Europe/Berlin:20250223T235959
DTSTAMP:20260504T055329
CREATED:20250605T120906Z
LAST-MODIFIED:20250605T120906Z
UID:10000020-1739923200-1740355199@www.trr352.de
SUMMARY:Molecular Dynamics
DESCRIPTION:
URL:http://www.trr352.de/event/molecular-dynamics/
LOCATION:University of Angers\, 40 Rue de Rennes\, Angers\, 49100\, France
CATEGORIES:Workshops/Conferences
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250317T000000
DTEND;TZID=Europe/Berlin:20250321T235959
DTSTAMP:20260504T055329
CREATED:20250618T103057Z
LAST-MODIFIED:20250618T103057Z
UID:10000027-1742169600-1742601599@www.trr352.de
SUMMARY:TRR 352 Winter School on Mathematical Physics
DESCRIPTION:
URL:http://www.trr352.de/event/trr-352-winter-school-on-mathematical-physics-2/
LOCATION:Georg-von-Vollmar-Akademie\, Am Aspensteinbichl 9\, Kochel am See\, 82431\, Germany
CATEGORIES:Schools
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250404T000000
DTEND;TZID=Europe/Berlin:20250404T235959
DTSTAMP:20260504T055329
CREATED:20250327T143242Z
LAST-MODIFIED:20250404T152905Z
UID:10000002-1743724800-1743811199@www.trr352.de
SUMMARY:Minisymposium on the recent proof of the ovals conjecture
DESCRIPTION:Program: \n11:00 am – Dr. Larry Read\, LMU München: Proof of the oval conjecture (Part 1) \nlunch \n1:30 pm – Matthias Baur\, M.Sc.\, Universität Stuttgart: Proof of the oval conjecture (Part 2) \ncoffee and discussion
URL:http://www.trr352.de/event/minisymposium-on-the-recent-proof-of-the-ovals-conjecture/
LOCATION:University of Stuttgart\, Seminarraum des IADM 8.526\, Pfaffenwaldring 57\, Stuttgart\, 70569\, Germany
CATEGORIES:Workshops/Conferences
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250408T000000
DTEND;TZID=Europe/Berlin:20250412T235959
DTSTAMP:20260504T055329
CREATED:20250605T120448Z
LAST-MODIFIED:20260315T182636Z
UID:10000019-1744070400-1744502399@www.trr352.de
SUMMARY:Frontiers in Analysis and Mathematical Physics
DESCRIPTION:
URL:http://www.trr352.de/event/frontiers-in-analysis-and-mathematical-physics/
LOCATION:Seoul National University\, 1 Gwanak-ro\, Gwanak-gu\, Seoul\, Korea\, Republic of
CATEGORIES:Workshops/Conferences
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250410T160000
DTEND;TZID=Europe/Berlin:20250410T160000
DTSTAMP:20260504T055329
CREATED:20250702T133349Z
LAST-MODIFIED:20250702T133349Z
UID:10000042-1744300800-1744300800@www.trr352.de
SUMMARY:Spectral measure for uniform d-regular digraphs
DESCRIPTION:
URL:http://www.trr352.de/event/spectral-measure-for-uniform-d-regular-digraphs/
LOCATION:Room C3N14\, Auf der Morgenstelle 10\, Tübingen\, 72076\, Germany
CATEGORIES:Talks
ORGANIZER;CN="Arka Adhikari":MAILTO:arkaa@umd.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250421T000000
DTEND;TZID=Europe/Berlin:20250426T235959
DTSTAMP:20260504T055329
CREATED:20250605T114841Z
LAST-MODIFIED:20250605T115549Z
UID:10000018-1745193600-1745711999@www.trr352.de
SUMMARY:Modern Methods for Differential Equations of Quantum Mechanics
DESCRIPTION:
URL:http://www.trr352.de/event/modern-methods-for-differential-equations-of-quantum-mechanics/
LOCATION:Banff International Research Station\, 107 Tunnel Mountain Dr\, Banff\, AB T1L 1H5\, Canada
CATEGORIES:Workshops/Conferences
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250428T150000
DTEND;TZID=Europe/Berlin:20250428T150000
DTSTAMP:20260504T055329
CREATED:20250701T150125Z
LAST-MODIFIED:20250701T150125Z
UID:10000040-1745852400-1745852400@www.trr352.de
SUMMARY:Phase transition for the late points of random walk
DESCRIPTION:Let X be a simple random walk in Znd with d≥3 and let tcov be the expected time it takes for X to visit all vertices of the torus. In joint work with Prévost and Rodriguez we study the set Lα of points that have not been visited by time αtcov and prove that it exhibits a phase transition: there exists α∗ so that for all α>α∗ and all ϵ>0 there exists a coupling between Lα and two i.i.d. Bernoulli sets B± on the torus with parameters n−(a±ϵ)d with the property that B−⊆Lα⊆B+ with probability tending to 1 as n→∞. When α≤α∗\, we prove that there is no such coupling.
URL:http://www.trr352.de/event/phase-transition-for-the-late-points-of-random-walk/
LOCATION:Room B 349\, Theresienstr. 39\, Munich\, 80333\, Germany
CATEGORIES:Talks
ORGANIZER;CN="Prof. Perla Sousi":MAILTO:P.Sousi@statslab.cam.ac.uk
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250428T150000
DTEND;TZID=Europe/Berlin:20250428T150000
DTSTAMP:20260504T055329
CREATED:20250701T150338Z
LAST-MODIFIED:20250701T150338Z
UID:10000041-1745852400-1745852400@www.trr352.de
SUMMARY:Scaling limit of the harmonic crystal with random conductances
DESCRIPTION:In this talk we consider discrete Gaussian free fields with ergodic random conductances on ℤd\, d ≥ 2\, where the conductances are possibly unbounded but satisfy a moment condition. As our main result\, we show that\, for almost every realisation of the environment\, the rescaled field converges in law towards a continuous Gaussian field. We also present a scaling limit for the covariances of the field. To obtain the latter\, we establish a quenched local limit theorem for the Green’s function of the associated random walk among random conductances with Dirichlet boundary conditions. This talk is based on a joint work with Martin Slowik and Anna-Lisa Sokol.
URL:http://www.trr352.de/event/scaling-limit-of-the-harmonic-crystal-with-random-conductances/
LOCATION:Room B 349\, Theresienstr. 39\, Munich\, 80333\, Germany
CATEGORIES:Talks
ORGANIZER;CN="Prof. Dr. Sebastian Andres":MAILTO:sebastian.andres@tu-bs.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250428T160000
DTEND;TZID=Europe/Berlin:20250428T160000
DTSTAMP:20260504T055329
CREATED:20250701T145857Z
LAST-MODIFIED:20250701T145857Z
UID:10000039-1745856000-1745856000@www.trr352.de
SUMMARY:Hybrid Continuous-Discrete-Variable Quantum Signal Processing: Algorithms and Applications
DESCRIPTION:Quantum computing with discrete variable (DV\, qubit) hardware is approaching the large scales necessary for computations beyond the reach of classical computers. Separately\, hardware containing native continuous-variable (CV\, oscillator) systems has received attention as an alternative approach\, yet the universal control of such systems is non-trivial. In this talk\, I will highlight novel quantum algorithms\, control protocols\, and applications developed for hybrid CV-DV quantum systems\, which offer powerful new computational paradigms that inherit the strengths of both DV and CV quantum processors. I will start by a pedagogical introduction to CV-DV systems and instruct sets for universal programmability. I will then present a variety of new hybrid CV-DV compilation techniques and algorithms\, including the extension of quantum signal processing to CV-DV systems. This is followed by several applications including state transfer\, quantum sensing\, and simulation of interacting spins and bosons. To facilitate the development of hybrid CV-DV processor systems\, I will also introduce formal Abstract Machine Models and Instruction Set Architectures — essential abstractions that enable developers to formulate applications\, compile algorithms\, and explore the potential of current and future hardware for realizing fault-tolerant circuits\, modules\, and processors. I will conclude the talk with open questions and future opportunities of hybrid CV-DV quantum computation in broader areas of science and engineering.
URL:http://www.trr352.de/event/hybrid-continuous-discrete-variable-quantum-signal-processing-algorithms-and-applications/
LOCATION:Room 5613.EG.008 (Seminarraum)\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Talks
ORGANIZER;CN="Dr. Yuan Liu":MAILTO:yliu335@ncsu.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250508T121500
DTEND;TZID=Europe/Berlin:20250508T121500
DTSTAMP:20260504T055329
CREATED:20250507T064109Z
LAST-MODIFIED:20250507T064443Z
UID:10000012-1746706500-1746706500@www.trr352.de
SUMMARY:Talk by Shi Jin
DESCRIPTION:On Thursday\, May 08\, 2025\, at 12:15 pm\, Prof. Dr. Shi Jin (Shanghai Jiao Tong University) will give a talk on “Quantum Computation of partial differential equations and related problems” at TUM\, Boltzmannstr. 3\, 85748 Garching Forschungszentrum\, room 03.06.011. \nAbstract: Quantum computers have the potential to gain algebraic and even up to exponential speed up compared with its classical counterparts\, and can lead to technology revolution in the 21st century. Since quantum computers are designed based on quantum mechanics principle\, they are most suitable to solve the Schrodinger equation\, and linear PDEs (and ODEs) evolved by unitary operators. The most efficient quantum PDE solver is quantum simulation based on solving the Schrodinger equation. It will be interesting to explore what other problems in scientific computing\, such as ODEs\, PDEs\, and linear algebra that arise in both classical and quantum systems\, can be handled by quantum simulation. \nWe will present a systematic way to develop quantum simulation algorithms for general differential equations. Our basic framework is dimension lifting\, that transfers non-autonomous ODEs/PDEs systems to autonomous ones\, nonlinear PDEs to linear ones\, and linear ones to Schrodinger type PDEs—coined “Schrodingerization”—with uniform evolutions. Our formulation allows both qubit and qumode (continuous-variable) formulations\, and their hybridizations\, and provides the foundation for analog quantum computing which are easier to realize in the near term.
URL:http://www.trr352.de/event/talk-by-shi-jin/
LOCATION:Room 03.06.011\, Boltzmannstr. 3\, Garching Forschungszentrum\, 85748\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250526T140000
DTEND;TZID=Europe/Berlin:20250526T140000
DTSTAMP:20260504T055329
CREATED:20250701T145329Z
LAST-MODIFIED:20250701T145329Z
UID:10000038-1748268000-1748268000@www.trr352.de
SUMMARY:High-performance local automaton decoders for defect matching in 1D
DESCRIPTION:
URL:http://www.trr352.de/event/high-performance-local-automaton-decoders-for-defect-matching-in-1d/
LOCATION:Room 5608.02.020 (Seminarraum (M11))\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Talks
ORGANIZER;CN="Louis Paletta":MAILTO:louis.paletta@inria.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250528T140000
DTEND;TZID=Europe/Berlin:20250528T140000
DTSTAMP:20260504T055329
CREATED:20250701T144230Z
LAST-MODIFIED:20250701T144418Z
UID:10000036-1748440800-1748440800@www.trr352.de
SUMMARY:Condensing zero range process
DESCRIPTION:We prove a fluid limit for the coarsening phase of the condensing zero-range process on a finite number of sites. When time and occupation per site are linearly rescaled by the total number of particles\, the evolution of the process is described by a piecewise linear trajectory in the simplex indexed by the sites. The linear coefficients are determined by the trace process of the underlying random walk on the subset of non-empty sites\, and the trajectory reaches an absorbing configuration in finite time. We identify the set of absorbing configurations and characterize the absorbing boundaries.\nJoint work with Johel Beltrán\, Daniela Cuesta and Milton Jara.
URL:http://www.trr352.de/event/condensing-zero-range-process/
LOCATION:University of Augsburg\, Room 2004 (L1)\, Universitätsstraße 14\, Augsburg\, 86159
CATEGORIES:Talks
ORGANIZER;CN="In%C3%A9s Armend%C3%A1riz":MAILTO:iarmend@dm.uba.ar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250528T140000
DTEND;TZID=Europe/Berlin:20250528T140000
DTSTAMP:20260504T055329
CREATED:20250701T144844Z
LAST-MODIFIED:20250701T144844Z
UID:10000037-1748440800-1748440800@www.trr352.de
SUMMARY:Wasserstein spaces and error control in approximations by neural networks
DESCRIPTION:We explore a connection between a weak topology on spaces of probability measures\, a classical combinatorial problem in matching\, and numerical schemes for the solution of PDEs by neural networks.
URL:http://www.trr352.de/event/wasserstein-spaces-and-error-control-in-approximations-by-neural-networks/
LOCATION:University of Augsburg\, Room 2004 (L1)\, Universitätsstraße 14\, Augsburg\, 86159
CATEGORIES:Talks
ORGANIZER;CN="Michalis Loulakis":MAILTO:loulakis@math.ntua.gr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250603T163000
DTEND;TZID=Europe/Berlin:20250603T163000
DTSTAMP:20260504T055329
CREATED:20250701T143532Z
LAST-MODIFIED:20250904T103339Z
UID:10000035-1748968200-1748968200@www.trr352.de
SUMMARY:Stabilization by quantum fluctuations in ultracold gases of magnetic atoms: experimental observations and theory descriptions
DESCRIPTION:Thanks to their high degree of control and tunability\, ultracold atomic gases provide a rich platform for the study of quantum many-body effects. Ultracold gases of highly magnetic atoms exhibit unique interaction properties that lead to striking behaviors\, both at the mean-field level and beyond [1]. A decade ago\, a universal stabilization mechanism driven by quantum fluctuations was discovered in these gases. This mechanism prevents the systems from collapsing when the mean-field interactions become attractive\, and instead allows exotic states of matter to arise\, including ultradilute quantum droplets\, crystallized quantum states\, and especially the so-called supersolids [2]. In my colloquium\, I will present the seminal observations of these states and how they emerged from the long-standing progress in the field. I will discuss the theoretical description of these systems via an effective mean-field theory\, including the effect of quantum fluctuations via a higher-order effective interaction. I will outline our current understanding of the properties of these states and highlight open questions. \n[1] L. Chomaz & al\, Dipolar physics: a review of experiments with magnetic quantum gases\, Reports on Progress in Physics 86\, 026401 (2023).\n[2] L. Chomaz\, Quantum-stabilized states in magnetic dipolar quantum gases\, arXiv preprint 2504.06221 (2025)
URL:http://www.trr352.de/event/stabilization-by-quantum-fluctuations-in-ultracold-gases-of-magnetic-atoms-experimental-observations-and-theory-descriptions/
LOCATION:Room A 027\, Theresienstr. 37\, Munich\, 80333\, Germany
CATEGORIES:Talks
ORGANIZER;CN="Prof. Dr. Lauriane Chomaz":MAILTO:chomaz@uni-heidelberg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250604T160000
DTEND;TZID=Europe/Berlin:20250604T160000
DTSTAMP:20260504T055329
CREATED:20250701T142959Z
LAST-MODIFIED:20250701T143753Z
UID:10000034-1749052800-1749052800@www.trr352.de
SUMMARY:DFG Funding Opportunities and Key Evaluation Criteria in DFG Proposals
DESCRIPTION:
URL:http://www.trr352.de/event/dfg-funding-opportunities-and-key-evaluation-criteria-in-dfg-proposals/
LOCATION:Room B 349\, Theresienstr. 39\, Munich\, 80333\, Germany
CATEGORIES:Talks
ORGANIZER;CN="Brit Red%C3%B6hl":MAILTO:Brit.Redoehl@dfg.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250605T121500
DTEND;TZID=Europe/Berlin:20250605T121500
DTSTAMP:20260504T055329
CREATED:20250327T191902Z
LAST-MODIFIED:20260219T213308Z
UID:10000003-1749125700-1749125700@www.trr352.de
SUMMARY:Regularized Dynamical Parametric Approximation for Stiff Evolution Problems
DESCRIPTION:Evolutionary deep neural networks have emerged as a rapidly growing field of research. This talk discusses numerical integrators for such and other classes of nonlinear parametrizations u(t) = Φ(θ(t)) where the evolving parameters θ(t) are to be computed. The primary focus is on tackling the challenges posed by the combination of stiff evolution problems and irregular parametrizations\, which typically arise with neural networks\, tensor networks\, flocks of evolving Gaussians\, and in further cases of overparametrization. Regularized parametric versions of the implicit Euler method and higher-order implicit Runge–Kutta methods for the time integration of the parameters in nonlinear approximations to evolutionary partial differential equations are presented. At each time step\, an ill-conditioned nonlinear optimization problem is solved approximately with a few regularized Gauß–Newton iterations. Error bounds for the resulting parametric integrator are derived by relating the computationally accessible Gauß–Newton iteration for the parameters to the computationally inaccessible Newton iteration for the underlying non-parametric time integration scheme. Numerical experiments that are designed to show key properties of the proposed parametric integrators are discussed.
URL:http://www.trr352.de/event/regularized-dynamical-parametric-approximation-for-stiff-evolution-problems/
LOCATION:Room 03.10.011\, Boltzmannstr. 3\, Garching Forschungszentrum\, 85748\, Germany
CATEGORIES:Talks
ORGANIZER;CN="Dr. J%C3%B6rg Nick":MAILTO:joerg.nick@math.ethz.ch
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250613T140000
DTEND;TZID=Europe/Berlin:20250613T140000
DTSTAMP:20260504T055329
CREATED:20250701T142444Z
LAST-MODIFIED:20250701T142700Z
UID:10000033-1749823200-1749823200@www.trr352.de
SUMMARY:Quantum Tomography from the Evolution of a Single Expectation
DESCRIPTION:Conventional quantum tomography assumes a high degree of control over the system in question in order to measure many observables. On the other hand\, a classical dynamical system may be reconstructed from a time series of a single observable by means of delay embeddings. Inspired by this\, we investigate the possibility of tomography of a quantum system undergoing a known homogenous time evolution when we have control over only the time of measurement. Remarkably\, full quantum state tomography is possible for every non-trivial binary measurement evolved by any quantum channel\, bar a null set. This remains true when restricted to Lindblad semigroups\, although unitary evolution–even with added simply depolarizing noise–is insufficient beyond the qubit case\, highlighting the need for non-trivial noise. We explore various further aspects of the problem\, including prior information\, expectation bounds for finite statistics\, and recovery of an infinite time series of expectation values from a finite one given only spectral properties of the evolution.
URL:http://www.trr352.de/event/quantum-tomography-from-the-evolution-of-a-single-expectation/
LOCATION:Room 5612.02.020 (Besprechungsraum)\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Talks
ORGANIZER;CN="Corlie Rall":MAILTO:hjalmar.rall@tum.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250613T160000
DTEND;TZID=Europe/Berlin:20250613T160000
DTSTAMP:20260504T055329
CREATED:20250706T224419Z
LAST-MODIFIED:20250829T134820Z
UID:10000066-1749830400-1749830400@www.trr352.de
SUMMARY:Magic moire materials with a twist
DESCRIPTION:I will review the mathematical analysis behind two classes of new exciting materials: Twisted bilayer graphene (TBG) and twisted semiconductors (TMDs) with an emphasis on their mathematical properties and differences. If time permits I will discuss results on these models under disorder. Joint work with Maciej Zworski\, Izak Oltman\, Martin Vogel\, and Mengxuan Yang.
URL:http://www.trr352.de/event/magic-moire-materials-with-a-twist/
LOCATION:Room C3N14\, Auf der Morgenstelle 10\, Tübingen\, 72076\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250710T121500
DTEND;TZID=Europe/Berlin:20250710T121500
DTSTAMP:20260504T055329
CREATED:20250701T142021Z
LAST-MODIFIED:20250701T142021Z
UID:10000032-1752149700-1752149700@www.trr352.de
SUMMARY:Filtered finite difference methods for semiclassical nonlinear Schrödinger equations
DESCRIPTION:
URL:http://www.trr352.de/event/filtered-finite-difference-methods-for-semiclassical-nonlinear-schrodinger-equations/
LOCATION:Room 03.06.011\, Boltzmannstr. 3\, Garching Forschungszentrum\, 85748\, Germany
CATEGORIES:Talks
ORGANIZER;CN="Prof. Dr. Christian Lubich":MAILTO:lubich@na.uni-tuebingen.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250715T163000
DTEND;TZID=Europe/Berlin:20250715T163000
DTSTAMP:20260504T055329
CREATED:20250707T132940Z
LAST-MODIFIED:20250904T091423Z
UID:10000104-1752597000-1752597000@www.trr352.de
SUMMARY:Optimal criteria for magnetic fields that bind electrons
DESCRIPTION:This talk will provide a basic introduction to the three dimensional Dirac equation that describes an electron interacting with a magnetic field. Over the years a lot of work has gone into constructing zero energy solutions\, also known as zero modes\, for said equation.\nIn this talk I will explain the importance of zero modes e.g. I will show how they relate to the stability of the hydrogen atom. After presenting explicit examples\, I will state necessary conditions for the magnetic field so that zero modes exist. Here\, of particular interest is a sharp inequality that is optimized by a magnetic field whose field lines are interlinking circles. This inequality relates to sharp inequalities for spinors of which some more examples will be given.
URL:http://www.trr352.de/event/optimal-criteria-for-magnetic-fields-that-bind-electrons/
LOCATION:Room A 027\, Theresienstr. 37\, Munich\, 80333\, Germany
CATEGORIES:Colloquia
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250716T183000
DTEND;TZID=Europe/Berlin:20250716T183000
DTSTAMP:20260504T055329
CREATED:20250707T132300Z
LAST-MODIFIED:20250707T132300Z
UID:10000101-1752690600-1752690600@www.trr352.de
SUMMARY:How Does a Quantum Computer Work?
DESCRIPTION:Quantum mechanics\, now about a century old\, is a very successful physical theory of matter on a small scale. From its first description until today\, it has surprised scientists and laypersons alike by the strange behaviour it attributes to particles\, atoms\, and molecules. This behaviour can be characterized by the keywords Uncertainty\, Superposition\, and Entanglement. \nIt took about sixty years before it was realized that these three characteristics do not just express a certain vagueness and strangeness of matter on a small scale but can actually be used to our advantage. In 1994 Peter Shor made this idea concrete by devising an algorithm that would enable large arrays of quantum systems to perform specific calculations (factoring large integers)\, which are impossible to do in practice on any classical device. With this algorithm\, present-day cryptographic schemes can be broken\, provided such “quantum computers” can be made to work. \nStarting from a discussion of the “two-slit experiment”\, we sketch the working of Shor’s algorithm and discuss the possibilities of future quantum computers.
URL:http://www.trr352.de/event/how-does-a-quantum-computer-work/
LOCATION:Room 0503.EG.360 (Theodor-Fischer-Hörsaal)\, Arcisstr. 21\, München\, 80333\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250901T000000
DTEND;TZID=Europe/Berlin:20250905T235959
DTSTAMP:20260504T055329
CREATED:20250404T183402Z
LAST-MODIFIED:20250904T101218Z
UID:10000009-1756684800-1757116799@www.trr352.de
SUMMARY:QMATH16: Mathematical Results in Quantum Theory
DESCRIPTION:
URL:http://www.trr352.de/event/qmath16-mathematical-results-in-quantum-theory/
LOCATION:School of Computation\, Information and Technology (CIT)\, Boltzmannstraße 3\, Garching bei München\, 85748\, Germany
CATEGORIES:Workshops/Conferences
END:VEVENT
END:VCALENDAR