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X-WR-CALNAME:SFB TRR 352
X-ORIGINAL-URL:http://www.trr352.de
X-WR-CALDESC:Events for SFB TRR 352
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260421T161500
DTEND;TZID=Europe/Berlin:20260421T161500
DTSTAMP:20260503T164011
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:http://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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260422T160000
DTEND;TZID=Europe/Berlin:20260422T160000
DTSTAMP:20260503T164011
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:http://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:20260508T150000
DTEND;TZID=Europe/Berlin:20260508T150000
DTSTAMP:20260503T164011
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:http://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:20260508T163000
DTEND;TZID=Europe/Berlin:20260508T163000
DTSTAMP:20260503T164011
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:http://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:20260511T160000
DTEND;TZID=Europe/Berlin:20260511T170000
DTSTAMP:20260503T164011
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:http://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:20261004T000000
DTEND;TZID=Europe/Berlin:20261008T235959
DTSTAMP:20260503T164011
CREATED:20250707T140006Z
LAST-MODIFIED:20250707T140006Z
UID:10000115-1791072000-1791503999@www.trr352.de
SUMMARY:Annual Retreat
DESCRIPTION:
URL:http://www.trr352.de/event/annual-retreat-3/
LOCATION:Georg-von-Vollmar-Akademie\, Am Aspensteinbichl 9\, Kochel am See\, 82431\, Germany
CATEGORIES:Retreats
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20261113T000000
DTEND;TZID=Europe/Berlin:20261113T235959
DTSTAMP:20260503T164011
CREATED:20260414T203243Z
LAST-MODIFIED:20260414T203546Z
UID:10000134-1794528000-1794614399@www.trr352.de
SUMMARY:Junior Meeting
DESCRIPTION:
URL:http://www.trr352.de/event/junior-meeting-4/
LOCATION:Haus Chiemgau\, Dechantshof 3\, Teisendorf\, 83317\, Germany
CATEGORIES:Retreats
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