Donnerstag, 02.07.2026: On a conjecture by Horowitz and Tod
Salvatore Vultaggio (Universität Tübingen)
In 1982, Tod and Horowitz proposed a “unified framework for discussing energy
in General Relativity”, which allowed to simultaneously treat the otherwise seemingly
incompatible null and space-like asymptotic regimes. The final steppingstone in the paper
is a conjecture: our effort is being concentrated on a formal analysis of this conjecture,
making use of the Conformal Methods pioneered by Friedrich.
| Uhrzeit: |
14:00 |
| Ort: |
C4H33 and virtual via zoom, for zoom link please contact Abir Seghirate |
| Gruppe: |
Oberseminar Geometrische Analysis, Differentialgeometrie und Relativitätstheorie |
| Einladender: |
Carla Cederbaum, Gerhard Huisken, zusammen mit Jan Metzger (Potsdam) |
Donnerstag, 02.07.2026: Topological phases of non-interacting systems: A general approach based on states
Prof. Giuseppe de Nittis (Pontificia Universidad Católica de Chile)
In this work we provide a classification scheme for topological phases of
certain systems whose observable algebra is described by certain (trivial)
C*-bundles. The classification is based on the study of the homotopy
classes of configurations, which are maps from a quantum parameter space to
the space of pure states of a reference fiber C*-algebra. Both the quantum
parameter space and the fiber algebra are naturally associated with the
observable algebra. A list of various examples described in the last part
shows that the common classification scheme of non-interacting topological
insulators of type A is recovered inside this new formalism.
| Uhrzeit: |
14:30 |
| Ort: |
C3N14 |
| Gruppe: |
Oberseminar Mathematical Physics |
| Einladender: |
Keppeler, Lemm, Pickl, Teufel, Tumulka |
