Welcome Room: E1 05 (Leibniz-Saal)

Mathematical General Relativity 1

• Dejan Gajic

Room: E1 05 (Leibniz-Saal)

Q&A Room: E1 05 (Leibniz-Saal)

Quantum fields out-of-equilibrium and information theory 1

• Stefan Flörchinger

Room: E1 05 (Leibniz-Saal)

Q&A Room: E1 05 (Leibniz-Saal)

Fluidlike behavior in small atomic systems

• Lars Heyen

Room: E1 05 (Leibniz-Saal)

Fermi-sea excitations in chiral one-dimensional quantum channels

• Felix Puster

Room: E1 05 (Leibniz-Saal)

Mathematical General Relativity 2

• Dejan Gajic

Room: E1 05 (Leibniz-Saal)

Q&A Room: E1 05 (Leibniz-Saal)

Multi-messenger Bayesian analysis of binary neutron start mergers

• Matteo Breschi

Room: E1 05 (Leibniz-Saal) The joint detection of the GW170817 and its electromagnetic counterparts is a milestone in multi-messenger astronomy and it can provide constraints on the neutron star equation of state. The LIGO-Virgo data of GW170817 are analyzed using different template models focusing on the implications for neutron star matter properties. We study AT2017gfo using semi-analytical model showing that observational data favor multi-component anisotropic geometries to spherically symmetric profiles. By joining the GW170817 and AT2017gfo information with the NICER measurements, we constrain the radius of a neutron star of 1.4 M⊙ to 12.4±0.7 km (90% confidence level). Finally, we explore future extreme-matter constraints delivered by postmerger gravitational-waves from binary neutron star remnants with next-generation detectors. Postmerger remnants can probe the high-density regimes of the nuclear equation of state, allowing the inference of the maximum neutron star mass with an accuracy of 12% (90% confidence level). Moreover, these transients can be used to infer the presence of non-nucleonic matter phases through the inference of softening of the equation of state.

GHG for Critical Phenomena simulations with bamps

• Daniela Cors

Room: E1 05 (Leibniz-Saal) We use our adapted pseudospectral code bamps, with its new hp adaptive mesh refinement, to tune close to the barrier between gravitational collapse and dispersed fields, and study the critical phenomena that emerges near that threshold. To achieve that goal and improve our previous results, we introduce adjustments to the generalised harmonic gauge formulation of General Relativity, adapting it to the specific case of near collapse simulations. In particular, we adjust the constraint violation damping scheme, taking into account the collapse of the lapse that occurs in extreme spacetimes. We also prevent coordinate singularities by carefully choosing the gauge source function. As a result of these changes, we manage to improve our threshold estimation results. In spherical symmetry, we show critical phenomena of a massless scalar field minimally coupled to the Einstein field equations. In axisymmetry, we study Brill gravitational waves in vacuum.

Towards binary boson star simulations

• Florian Atteneder

Room: E1 05 (Leibniz-Saal)

Quantum fields out-of-equilibrium and information theory 2

• Stefan Flörchinger

Room: E1 05 (Leibniz-Saal)

Q&A Room: E1 05 (Leibniz-Saal)

Magnetic catalysis in the (2+1)-dimensional Gross-Neveu model

• Michael Mandl

Room: E1 05 (Leibniz-Saal)

Global conformal blocks on the plane from oscillator representations

• Tobias Hössel

Room: E1 05 (Leibniz-Saal)

Fellow & PI meetings Room: E1 05 (Leibniz-Saal)

Quantum black holes 1

• Marc Casals

Room: E1 05 (Leibniz-Saal)

Q&A Room: E1 05 (Leibniz-Saal)

Gravitional entanglement & quantization of spacetime

• Kemal Döner

Room: E1 05 (Leibniz-Saal)

Hadamard property of the Unruh state on Kerr-de Sitter spacetime

• Christiane Klein

Room: E1 05 (Leibniz-Saal)

RTG General assembly Room: E1 05 (Leibniz-Saal)

Quantum black holes 2

• Marc Casals

Room: E1 05 (Leibniz-Saal)

Q&A Room: E1 05 (Leibniz-Saal)