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Calendar of Physics Talks Vienna
| Applied Newton-Cartan Geometry |
| Speaker: | Eric Bergshoeff (Univ. of Groningen, NL) |
| Abstract: | I will give an introduction into the non-relativistic version of Riemannian geometry, which is called Newton-Cartan geometry. The corresponding non-relativistic gravity theory, called Newton-Cartan gravity, has received a renewed attention due to
unexpected applications as a new tool to examine the (non-perturbative) properties
of non-relativistic quantum field theories.
I will explain the basic construction of Newton-Cartan gravity plus some of its generalizations thereby putting an emphasis on how these different theories
can be obtained by taking limits or reductions of General Relativity.
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| Date: | Tue, 21.03.2017 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | S. Fredenhagen, H. Steinacker |
| Higher order perturbations of Anti-de Sitter space and time-periodic solutions of vacuum Einstein equations |
| Speaker: | Andrzej Rostworowski (Cracow) |
| Abstract: | Motivated by the problem of stability of Anti-de Sitter (AdS) spacetime, I will discuss nonlinear gravitational perturbations of maximally symmetric solutions of vacuum Einstein equations in general and the case of AdS in particular. I will present the evidence that, similarly to the self-gravitating scalar field at spherical symmetry,
the negative cosmological constant allows for the existence of globally regular, asymptotically AdS, time-periodic solutions of vacuum Einstein equations that
bifurcate from linear eigenfrequencies of AdS. Interestingly, preliminary results
ndicate that the number of time-periodic solutions bifurcating from a given eigenfrequency equals the multiplicity of this eigenfrequency.
The talk will be based on the recent preprint https://arxiv.org/abs/1701.07804
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| Date: | Thu, 23.03.2017 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Raum 218, 2. Stock, 1090 Wien |
| Contact: | P.T. Chrusciel |
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