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X-WR-CALDESC:Events for SFB TRR 352
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241204T160000
DTEND;TZID=Europe/Berlin:20241204T160000
DTSTAMP:20260504T054742
CREATED:20250703T142205Z
LAST-MODIFIED:20250703T142205Z
UID:10000051-1733328000-1733328000@www.trr352.de
SUMMARY:Rapid thermalisation of quantum dissipative many-body systems
DESCRIPTION:Quantum systems typically reach thermal equilibrium when in weak contact with a large external bath. Understanding the speed of this thermalisation is a challenging problem\, especially in the context of quantum many-body systems where direct calculations are intractable. The usual way of bounding the speed of this process is by estimating the spectral gap of the dissipative generator\, but this does not always yield a reasonable estimate for the thermalisation time. When the system satisfies instead a modified logarithmic Sobolev inequality (MLSI)\, the thermalisation time is at most logarithmic in the system size\, yielding wide-ranging applications to the study of many-body in and out-of-equilibrium quantum systems\, such as stability against local perturbations (in the generator)\, efficient preparation of Gibbs states (the equilibria of these processes)\, etc. \nIn this talk\, I will present an overview on a strategy to prove that a system satisfies a MLSI provided that correlations decay sufficiently fast between spatially separated regions on the Gibbs state of a local\, commuting Hamiltonian in any dimension. I will subsequently review the current state of the art for Davies dissipative generators thermalising to such Gibbs states.
URL:http://www.trr352.de/event/rapid-thermalisation-of-quantum-dissipative-many-body-systems/
LOCATION:Room 5610.EG.011 (CIT Sitzungsraum 1)\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Talks
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241210T160000
DTEND;TZID=Europe/Berlin:20241210T160000
DTSTAMP:20260504T054742
CREATED:20250404T185700Z
LAST-MODIFIED:20250404T190105Z
UID:10000011-1733846400-1733846400@www.trr352.de
SUMMARY:Mathematical Advances in BCS Theory of Superconductivity
DESCRIPTION:Bardeen-Cooper-Schrieffer (BCS) theory is a successful model of superconductivity. In this talk\, I will begin by providing an overview of how BCS theory connects with other models of superconductivity\, highlighting major open questions and recent developments in the field. Second\, I will explain recent results on the critical temperature in the presence of a boundary in more detail.
URL:http://www.trr352.de/event/mathematical-advances-in-bcs-theory-of-superconductivity/
LOCATION:Seminar Room\, 4th floor\, Auf der Morgenstelle 10\, Tübingen\, 72076\, Germany
CATEGORIES:Junior Coffee Breaks
ORGANIZER;CN="Dr. Barbara Roos":MAILTO:barbara.roos@uni-tuebingen.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241212T163000
DTEND;TZID=Europe/Berlin:20241212T163000
DTSTAMP:20260504T054742
CREATED:20250703T141555Z
LAST-MODIFIED:20250703T141555Z
UID:10000050-1734021000-1734021000@www.trr352.de
SUMMARY:Landau damping
DESCRIPTION:Of great interest in plasma physics is to determine whether excited charged particles in a non-equilibrium state will relax to neutrality or transition to a nontrivial coherent state. Due to the long range interaction between particles\, the self-consistent generating electric field oscillates in time and disperses in space like a Klein-Gordon wave\, known in the physical literature as plasma oscillations or Langmuir’s oscillatory waves. Landau in his original work addresses the decay of such an electric field\, namely the energy exchange between the oscillatory electric field and charged particles\, in a linearized setting. This talk will provide an overview of the recent mathematical advances in the nonlinear setting. The talk should be accessible to graduate students and the general audience.
URL:http://www.trr352.de/event/landau-damping/
LOCATION:Room A 027\, Theresienstr. 37\, Munich\, 80333\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241215T000000
DTEND;TZID=Europe/Berlin:20241220T235959
DTSTAMP:20260504T054742
CREATED:20250604T122049Z
LAST-MODIFIED:20250604T122049Z
UID:10000014-1734220800-1734739199@www.trr352.de
SUMMARY:Mathematical Physics and PDEs
DESCRIPTION:
URL:http://www.trr352.de/event/mathematical-physics-and-pdes/
LOCATION:Haus der bayerischen Landwirtschaft\, Rieder Str. 70\, Herrsching am Ammersee\, 82211\, Germany
CATEGORIES:Workshops/Conferences
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241216T000000
DTEND;TZID=Europe/Berlin:20241220T235959
DTSTAMP:20260504T054742
CREATED:20250604T121603Z
LAST-MODIFIED:20250604T121603Z
UID:10000013-1734307200-1734739199@www.trr352.de
SUMMARY:Correlations of Quantum Many-Body Systems
DESCRIPTION:
URL:http://www.trr352.de/event/correlations-of-quantum-many-body-systems/
LOCATION:Department of Mathematics\, Room N14\, Auf der Morgenstelle 10\, Tübingen\, 72076\, Germany
CATEGORIES:Workshops/Conferences
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241216T143000
DTEND;TZID=Europe/Berlin:20241216T143000
DTSTAMP:20260504T054742
CREATED:20250703T141233Z
LAST-MODIFIED:20250703T141233Z
UID:10000048-1734359400-1734359400@www.trr352.de
SUMMARY:Phase diagram of the loop O(n) model
DESCRIPTION:Phase transitions are natural phenomena in which a small change in an external parameter\, like temperature or pressure\, causes a dramatic change in the qualitative structure of the object. To study this\, many scientists (such as Nobel laureates Pauling and Flory) proposed the abstract framework of lattice models. The focus of this talk is on the loop O(n) model on the hexagonal lattice. Among its particular cases are percolation\, Ising model\, self-avoiding walk\, dimers\, integer-valued Lipschitz functions\, proper 4-colourings and others. The loop O(n) model has attracted a lot of attention due to its rich phase diagram that includes a large region of parameters with an expected conformally invariant scaling limit. The model is difficult to study due to the lack of monotonicity with respect to parameters: each point of the phase diagram should be treated separately. In particular\, existence of macroscopic loops has been established only recently in several sparse regions of parameters. I will present a unifying approach that applies to all n between 1 and 2. Main tools: novel graphical representation\, Benjamini—Schramm limit\, XOR argument (aka arXiv:2001.11977) and a new bound on a percolation threshold (due to Harel and Zelesko). This is joint work with Matan Harel (Northeastern).
URL:http://www.trr352.de/event/phase-diagram-of-the-loop-on-model/
LOCATION:Room B 349\, Theresienstr. 39\, Munich\, 80333\, Germany
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241216T143000
DTEND;TZID=Europe/Berlin:20241216T143000
DTSTAMP:20260504T054742
CREATED:20250703T141417Z
LAST-MODIFIED:20250703T141417Z
UID:10000049-1734359400-1734359400@www.trr352.de
SUMMARY:The hypergraph removal process
DESCRIPTION:Fix some graph or uniform hypergraph F and then consider the following simple process:\nstart with a large complete (hyper)graph Kn on n vertices and iteratively remove (the edge set of) copies of F as long as possible; each selection is made uniformly among all present copies of F at that time. This process is known as the F-removal process. The determination of the termination time (how many edges are left when the process terminates) is the key question regarding this process. This question has proven to be highly challenging. Bohman\, Frieze and Lubetzky famously proved in 2015 that the triangle-removal process (F is a triangle) typically terminates with n3/2+o(1) edges. For no other (hyper)graph F has the termination of the F-removal process been established. We determine when the F-removal process ends for all “sensible” choices of F; this includes cliques\, for which a major folklore conjecture in this area predicts the termination time.\nThis is joint work with Marcus Kühn.
URL:http://www.trr352.de/event/the-hypergraph-removal-process/
LOCATION:Room B 349\, Theresienstr. 39\, Munich\, 80333\, Germany
CATEGORIES:Talks
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