Adiabatic regularization for spin-1/2 fields
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Adiabatic regularization for spin-1/2 fields

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Adiabatic regularization for spin-1/2 fields

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dc.contributor.author Landete Marcos, Aitor
dc.contributor.author Navarro Salas, José
dc.contributor.author Torrentí Salom, Francisco
dc.date.accessioned 2014-02-20T10:16:22Z
dc.date.available 2014-02-20T10:16:22Z
dc.date.issued 2013
dc.identifier.uri http://dx.doi.org/10.1103/PhysRevD.88.061501
dc.identifier.uri http://hdl.handle.net/10550/33121
dc.description.abstract We extend the adiabatic regularization method to spin-1/2 fields. The ansatz for the adiabatic expansion for fermionic modes differs significantly from the WKB-type template that works for scalar modes. We give explicit expressions for the first adiabatic orders and analyze particle creation in de Sitter spacetime. As for scalar fields, the adiabatic method can be distinguished by its capability to overcome the UV divergences of the particle number operator. We also test the consistency of the extended method by working out the conformal and axial anomalies for a Dirac field in a Friedmann-Lemaitre-Robertson-Walker spacetime, in exact agreement with those obtained from other renormalization prescriptions. We finally show its power by computing the renormalized stress-energy tensor for Dirac fermions in de Sitter space.
dc.relation.ispartof Physical Review D, 2013, vol. 88, num. 6, p. 061501(R)
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Landete Marcos, Aitor Navarro Salas, José Torrenti Salom, Francisco 2013 Adiabatic regularization for spin-1/2 fields Physical Review D 88 6 061501(R)
dc.subject Física nuclear
dc.title Adiabatic regularization for spin-1/2 fields
dc.type info:eu-repo/semantics/article
dc.date.updated 2014-02-20T10:16:22Z
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevD.88.061501
dc.identifier.idgrec 091195

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