Quantum gravity fluctuations in the timelike Raychaudhuri equation

Sang Eon Bak; Maulik Parikh; Sudipta Sarkar; Francesco Setti

doi:10.1007/JHEP05(2023)125

Quantum gravity fluctuations in the timelike Raychaudhuri equation

Sang Eon Bak, Maulik Parikh, Sudipta Sarkar, Francesco Setti

Physics

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We consider a timelike geodesic congruence in the presence of perturbative quantum fluctuations of the spacetime metric. We calculate the change in the volume of a bundle of geodesics due to such fluctuations and thereby obtain a quantum-gravitationally modified timelike Raychaudhuri equation. Quantum gravity generically increases the convergence of congruences and the production of caustics.

Original language	English (US)
Article number	125
Journal	Journal of High Energy Physics
Volume	2023
Issue number	5
DOIs	https://doi.org/10.1007/JHEP05(2023)125
State	Published - May 2023

Keywords

Classical Theories of Gravity
Models of Quantum Gravity

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1007/JHEP05(2023)125

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abstract = "We consider a timelike geodesic congruence in the presence of perturbative quantum fluctuations of the spacetime metric. We calculate the change in the volume of a bundle of geodesics due to such fluctuations and thereby obtain a quantum-gravitationally modified timelike Raychaudhuri equation. Quantum gravity generically increases the convergence of congruences and the production of caustics.",

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N2 - We consider a timelike geodesic congruence in the presence of perturbative quantum fluctuations of the spacetime metric. We calculate the change in the volume of a bundle of geodesics due to such fluctuations and thereby obtain a quantum-gravitationally modified timelike Raychaudhuri equation. Quantum gravity generically increases the convergence of congruences and the production of caustics.

AB - We consider a timelike geodesic congruence in the presence of perturbative quantum fluctuations of the spacetime metric. We calculate the change in the volume of a bundle of geodesics due to such fluctuations and thereby obtain a quantum-gravitationally modified timelike Raychaudhuri equation. Quantum gravity generically increases the convergence of congruences and the production of caustics.

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KW - Models of Quantum Gravity

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Quantum gravity fluctuations in the timelike Raychaudhuri equation

Abstract

Keywords

ASJC Scopus subject areas

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