Robustness of the quantum BKL scenario

TL;DR

This paper demonstrates that the quantum bounce in the quantum BKL scenario is a robust feature, independent of the affine group parametrization used in the affine coherent states quantization.

Contribution

It shows that the qualitative features of the quantum BKL scenario are invariant under different affine group parametrizations, confirming the generic nature of the quantum bounce.

Findings

Quantum bounce is independent of group parametrization.

Qualitative features of the quantum system are robust.

Supports the universality of the quantum BKL scenario.

Abstract

Quantum Belinski-Khalatnikov-Lifshitz scenario presents an unitary evolution of the system. However, the affine coherent states quantization applied to the quantization of the underlying classical scenario depends on the choice of the group parametrization. Using two simplest parameterizations of the affine group, we show that qualitative features of our quantum system do not depend on the choice. It means that the quantum bounce replacing singular classical scenario is expected to be a generic feature of considered system. This paper complements our recent article [1].