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Calendar of Physics Talks Vienna
| T-witts on the soft hair program |
| Speaker: | M.M. Sheikh-Jabbari (IPM Teheran & ICTP Trieste) |
| Abstract: | im Rahmen des Joint TU/UV Theory Seminar; We study the nontrivial diffeomorphisms and the associated symmetry algebras
near a bifurcate horizon of a generic black hole.
In particular, we explore possible near horizon falloff and boundary conditions.
We discuss potential application of these analyses for the black hole microstate problem.
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| Date: | Tue, 08.10.2019 |
| Time: | 13:45 |
| Duration: | 60 min |
| Location: | TU Wien, Wiedner Hauptstraße 8, Red Area, 7th floor, Seminar Room DC07 A15 |
| Contact: | S. Fredenhagen, D. Grumiller. C. Zwikel, T. Schimannek |
| Quantum Optical Control of Levitated Solids: a novel probe for the gravity-quantum interface |
| Speaker: | Prof. Markus Aspelmeyer (Faculty of Physics, University of Vienna and Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences) |
| Abstract: | The increasing level of control over motional quantum states of massive, solid-state mechanical devices opens the door to an hitherto unexplored parameter regime of macroscopic quantum physics. I will report on our recent progress towards controlling levitated solids in the quantum regime. I will discuss the prospects of using these systems for fundamental tests of physics, including the interface between quantum and gravitational physics. |
| Date: | Tue, 08.10.2019 |
| Time: | 17:00 |
| Duration: | 60 min |
| Location: | Stefan-Meyer-Institut, Boltzmanngasse 3, 1090 Wien, Seminarraum 3-2-08 (2. Stock) |
| Contact: | Prof. Dr. Eberhard Widmann, Dr. Martin Simon |
| Relativistic Fluid Dynamics Out of Equilibrium |
| Speaker: | Paul Romatschke (University of Colorado, Boulder) |
| Abstract: | In standard textbooks, fluid dynamics is often introduced as
a near-equilibrium approximation to classical kinetic theory. Recent
advances, both in theory for out-of-equilibrium quantum field theories
and experimental data from high energy colliders, have taught us that
the textbooks are wrong: fluid dynamics quantitatively applies in
out-of-equilibrium, and highly quantum-mechanical, situations. In
these lectures, I will discuss how modern out-of-equilibrium fluid
dynamics is set up, how it relates to familiar microscopic approaches
such as kinetic theory and gauge/gravity duality, and how and when it
breaks down. If time allows, I will discuss applications of out-of-equilibrium
fluid dynamics to relativistic ion collisions at the LHC, and cosmology.
(Lecture series, continued on October 10 and 11, 2019 - see http://dkpi.at)
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| Date: | Wed, 09.10.2019 |
| Time: | 16:00 |
| Duration: | 90 min |
| Location: | TU Wien, Wiedner Haupstr. 8-10, 2nd floor, lecture hall FH HS 7 |
| Contact: | Anton Rebhan |
| HOW TO SMOOTH CRINKLES IN SPACETIME AND EXTEND UHLENBECK'S CURVATURE BOUNDS TO LORENTZIAN GEOMETRY BY THE ELLIPTIC RT-EQUATIONS |
| Speaker: | Moritz Reintjes (Konstanz) |
| Abstract: | When can you remove a singularity of spacetime by coor-dinate transformation?I will report on our recent discovery of a system of nonlinear elliptic PDE's on spacetime,the Regularity Transforma-tion equations (RT-equations),which determine whether a non-optimal connection can be smoothed to optimal regularity by coordinate trans-formation, (i.e.,to one derivative smoother than its Riemann curvature tensor Riem()).The RT-equations apply to connections on a tangent bundle TMof an arbitrary manifoldM, including semi-Riemannian and Lorentzian manifolds of Relativity.By developing an existence theory for the nonlinear RT-equations for such connections in L1,we prove that optimal connection regularity W1;p (any p < 1) can always be achieved and that no regularity singularities exist at GR shock waves.The celebrated curvature bounds of Uhlenbeck (a topic of this year's Abel prize)... |
| Date: | Thu, 10.10.2019 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Raum 218, 2. Stock, 1090 Wien |
| Contact: | P.T. Chrusciel, D. Fajman |
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