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Author  |
Ferreiro, A.; Pla, S. | ||||
| Title | Adiabatic regularization and preferred vacuum state for the lambda phi^4 field theory in cosmological spacetimes | Type | Journal Article | ||
| Year | 2022 | Publication | Physical Review D | Abbreviated Journal | Phys. Rev. D |
| Volume | 106 | Issue | 6 | Pages | 065015 - 12pp |
| Keywords | |||||
| Abstract | We extend the method of adiabatic regularization by introducing an arbitrary parameter μfor a scalar field with quartic self-coupling in a Friedmann-Lemaitre-Robertson-Walker spacetime at one-loop order. The subtraction terms constructed from this extended version allow us to define a preferred vacuum state at a fixed time ri 1/4 ri0 for this theory. We compute this vacuum state for two commonly used background fields in cosmology, specially in the context of preheating. We also give a possible prescription for an adequate value for mu. | ||||
| Address | [Ferreiro, Antonio] Dublin City Univ, Ctr Astrophys & Relat, Sch Math Sci, Dublin, Ireland, Email: antonio.ferreiro@dcu.ie; | ||||
| Corporate Author | Thesis | ||||
| Publisher | Amer Physical Soc | Place of Publication | Editor | ||
| Language | English | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 2470-0010 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | WOS:000862258200010 | Approved | no | ||
| Is ISI | yes | International Collaboration | yes | ||
| Call Number | IFIC @ pastor @ | Serial | 5382 | ||
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