Work

Time problem in primordial perturbations

Year: 2024

Type: article

Abstract: We study the nonunitary relation between quantum gravitational models defined using different internal times. We show that, despite the nonunitarity, it is possible to provide a prescription for making unambiguous, though restricted, physical predictions independent of specific clocks. To illustrate this result, we employ a model of quantum gravitational waves in a quantum Friedmann universe.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.109.106005

Authors: Alice Boldrin, Przemysław Małkiewicz, Patrick Peter

Institutions: National Centre for Nuclear Research, Centre National de la Recherche Scientifique, Sorbonne Université

Language: English

Topic: Noncommutative and Quantum Gravity Theories

Subfield: Statistical and Nonlinear Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Narodowe Centrum Nauki

Award: G4004055014