Renormalization of Quantum Fields in Curved Spacetime
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Renormalization of Quantum Fields in Curved Spacetime

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Renormalization of Quantum Fields in Curved Spacetime

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dc.contributor.advisor Navarro Salas, José
dc.contributor.author Ferreiro De Aguiar, Antonio Eduardo
dc.contributor.other Departament de Fisica Teòrica es_ES
dc.date.accessioned 2021-07-05T10:57:01Z
dc.date.available 2021-08-05T04:45:05Z
dc.date.issued 2021 es_ES
dc.date.submitted 02-07-2020 es_ES
dc.identifier.uri https://hdl.handle.net/10550/79874
dc.description.abstract Quantum fields in curved spacetime undergo fluctuations that produce non-vanishing vacuum expectation values of the stress-energy tensor, i.e., energy can be generated due to the gravitational field. The same happens for other type of background fields like gauge or scalars. This effect plays an important role in the early Universe, in astrophysical compact objects, and in strong electromagnetic phenomena. However, the computation of the stress-energy tensor, among others, is a highly nontrivial issue. In particular, non-trivial divergences appear when computing expectation values of local observables. The objective of my thesis is to tackle this issue by studying regularization and renormalization mechanisms for quantum fields in curved spacetime, especially in Friedman-Robertson-Walker-Lemaitre spacetimes. On the one hand, this will be done by extending adiabatic regularization to include interacting fields (scalar, gauge fields). On the other hand, running of the coupling constant by introducing a mass parameter will be computed for general curved spacetime and a subtraction scheme, that naturally incorporates decoupling for higher massive fields will be obtained. A particular application will be given in the context of the cosmological constant problem. es_ES
dc.format.extent 194 p. es_ES
dc.language.iso en es_ES
dc.title Renormalization of Quantum Fields in Curved Spacetime es_ES
dc.type info:eu-repo/semantics/doctoralThesis es_ES
dc.subject.unesco UNESCO::FÍSICA es_ES
dc.embargo.terms 1 month es_ES

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