Polymer Quantum Dynamics of the Taub Universe

TL;DR

This paper explores the polymer quantization of the Taub universe, revealing classical trajectory modifications and persistent singularities, with quantum interference effects not preventing singularity formation.

Contribution

It applies polymer quantization to the Taub cosmological model, analyzing both classical and quantum dynamics within a non-standard representation.

Findings

Classical trajectories flatten near potential walls.

Quantum wave packets exhibit interference phenomena.

Singularity persists despite quantum effects.

Abstract

Within the framework of non-standard (Weyl) representations of the canonical commutation relations, we investigate the polymer quantization of the Taub cosmological model. The Taub model is analyzed within the Arnowitt-Deser-Misner reduction of its dynamics, by which a time variable arises. While the energy variable and its conjugate momentum are treated as ordinary Heisenberg operators, the anisotropy variable and its conjugate momentum are represented by the polymer technique. The model is analyzed at both classical and quantum level. As a result, classical trajectories flatten with respect to the potential wall, and the cosmological singularity is not probabilistically removed. In fact, the dynamics of the wave packets is characterized by an interference phenomenon, which, however, is not able to stop the evolution towards the classical singularity.