Speaker
Description
There is a growing interest in investigating homogeneous but anisotropic spacetimes owing to their relation with nonrotating, uncharged black hole interiors. In this context, we present a description of axial perturbations in Kantowski-Sachs spacetimes with a massless scalar field. We truncate the action at the quadratic perturbative order. Perturbations are expressed in terms of perturbative gauge invariants, linear perturbative constraints, and their canonical momenta. Moreover, the entire system formed by these perturbations and the background degrees of freedom is also described by a canonical set of variables. We adopt a hybrid approach to quantize this system, combining a quantum representation of the background sector using Loop Quantum Cosmology with a more conventional Fock quantization of the perturbations. We comment on possible lines for future research and applications to black hole physics.
