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Infrared signatures of quantum bounce in a minisuperspace analysis of Lema\^{\i}tre-Tolman-Bondi dust collapse by Sahota, Harkirat Singh; Lochan, Kinjalk is a scholarly article available to read on EtoBox.

What is Infrared signatures of quantum bounce in a minisuperspace analysis of Lema\^{\i}tre-Tolman-Bondi dust collapse about?

In the quantum treatment of collapsing matter, a viable mode analysis is supposed to give information regarding emission during the collapse. Nevertheless, partly owing to operator ordering ambiguities involved in a typical quantum gravity analysis, the availability of such well-defined modes is not guaranteed. We study the mode decomposition of the unitarily evolving wave packet constructed for the quantum model of spherically symmetric dust collapsing in a marginally bound Lema\^{\i}tre-Tolman-Bondi (LTB) model. We identify the observable depicting mode decomposition, and using the freedom of operator ordering ambiguity, we obtain the Hermitian extension of this operator alongside the Hermitian Hamiltonian. After identifying incoming and outgoing modes with this operator's eigenstates, we estimate their contributions to the radiation profile. The infrared sector of this process demonstrates some characteristic features which turn out to be highly sensitive to the near-bounce dynamics of the dust cloud. Near the epoch of classical singularity, there is a significant contribution from incoming/outgoing modes of small wavenumber in the expanding/collapsing phase of the dust cloud, w

Author

Sahota, Harkirat Singh; Lochan, Kinjalk

Published

2021

Language

EN