Quantum-gravitational null Raychaudhuri equation

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dc.contributor.author Bak, Sang-Eon
dc.contributor.author Parikh, Maulik
dc.contributor.author Sarkar, Sudipta
dc.contributor.author Setti, Francesco
dc.coverage.spatial United Kingdom
dc.date.accessioned 2024-08-09T10:31:53Z
dc.date.available 2024-08-09T10:31:53Z
dc.date.issued 2024-07
dc.identifier.citation Bak, Sang-Eon; Parikh, Maulik; Sarkar, Sudipta and Setti, Francesco, "Quantum-gravitational null Raychaudhuri equation", Journal of High Energy Physics, DOI: 10.1007/JHEP07(2024)214, vol. 2024, no. 7, Jul. 2024.
dc.identifier.issn 1126-6708
dc.identifier.issn 1029-8479
dc.identifier.uri https://doi.org/10.1007/JHEP07(2024)214
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/10295
dc.description.abstract We consider a congruence of null geodesics in the presence of a quantized spacetime metric. The coupling to a quantum metric induces fluctuations in the congruence; we calculate the change in the area of a pencil of geodesics induced by such fluctuations. For the gravitational field in its vacuum state, we find that quantum gravity contributes a correction to the null Raychaudhuri equation which is of the same sign as the classical terms. We thus derive a quantum-gravitational focusing theorem valid for linearized quantum gravity.
dc.description.abstract We consider a congruence of null geodesics in the presence of a quantized spacetime metric. The coupling to a quantum metric induces fluctuations in the congruence; we calculate the change in the area of a pencil of geodesics induced by such fluctuations. For the gravitational field in its vacuum state, we find that quantum gravity contributes a correction to the null Raychaudhuri equation which is of the same sign as the classical terms. We thus derive a quantum-gravitational focusing theorem valid for linearized quantum gravity.
dc.description.statementofresponsibility by Sang-Eon Bak, Maulik Parikh, Sudipta Sarkar and Francesco Setti
dc.format.extent vol. 2024, no. 7
dc.language.iso en_US
dc.publisher Springer
dc.subject Classical theories of gravity
dc.subject Models of quantum gravity
dc.title Quantum-gravitational null Raychaudhuri equation
dc.type Article
dc.relation.journal Journal of High Energy Physics


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