### Conveners

#### T1-9 General Relativity II (DTP) | Relativité générale II (DPT)

- Gabor Kunstatter (University of Winnipeg)

Stationary black hole solutions of classical general relativity satisfy certain identities relating their mass, angular momenta, and charge which are in close analogy with familiar thermodynamic laws. In this talk I will describe new identities for the physical variables of five-dimensional, asymptotically flat, stationary vacuum black holes. Unlike the well known Smarr relation, these...

We discuss gravitational waves interacting with scalar particles and neutrinos. We discuss the physical implications of the results for detection on earth and early universe cosmology.

I describe results that show how black holes affect the entanglement of qubits. Making use of an approach called entanglement harvesting, which is an operational way to transfer correlations from the quantum vacuum to (idealized) detectors, I show how quantum correlations are affected by the structure of spacetime. This becomes particularly interesting when the spacetime has curvature, and...

We demonstrate the existence of stable, non-singular, negative mass solutions in de Sitter spacetime. The solutions correspond to the exact negative mass Schwarzschild-de Sitter spacetime on the outside of a thin, spherical wall and a smooth mass distribution on the inside, that is non-singular at the origin. The solution satisfies the Israel junction conditions at the location of the wall. ...

A lot can be learned about spacetime by rescaling it à la Weyl. The familiar analogy between the laws of black hole mechanics and thermodynamics becomes ambiguous under such a rescaling. The deep reason for such an issue goes back to the fundamental dichotomy between matter and geometry inherent in Einstein equations. This dichotomy is actually so fundamental that the issue extends beyond...

Black holes in a rotating and expanding space-time

In a previous paper [1], we have studied in detail the static non-empty symmetric geometry described by a metric based on an erfc gravitational potential. Although this new metric provides a consistent set of predictions and interpretations regarding some open problems in the solar system [2], the residual static offset incorporated in the...