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Stretching and Kibble scaling regimes for Hubble-damped defect networks

Martins, C.J.A.P.; Rybak, I. Yu.; Avgoustidis, A.; Shellard, E.P.S.

Authors

C.J.A.P. Martins

I. Yu. Rybak

E.P.S. Shellard



Abstract

The cosmological evolution of topological defect networks can broadly be divided into two stages. At early times they are friction dominated due to particle scattering and therefore nonrelativistic and may either be conformally stretched or evolve in the Kibble regime. At late times they are relativistic and evolve in the well-known linear scaling regime. In this work we show that a sufficiently large Hubble damping (that is a sufficiently fast expansion rate) leads to a linear scaling regime where the network is nonrelativistic. This is therefore another realization of a Kibble scaling regime and also has a conformal stretching regime counterpart which we characterize for the first time. We describe these regimes using analytic arguments in the context of the velocity-dependent one-scale model, and we confirm them using high-resolution 4096[superscript]3 field-theory simulations of domain wall networks. We also use these simulations to improve the calibration of this analytic model for the case of domain walls.

Citation

Martins, C., Rybak, I. Y., Avgoustidis, A., & Shellard, E. (2016). Stretching and Kibble scaling regimes for Hubble-damped defect networks. Physical Review D, 94(11), Article 116017. https://doi.org/10.1103/PhysRevD.94.116017

Journal Article Type Article
Acceptance Date Dec 9, 2016
Online Publication Date Dec 27, 2016
Publication Date Dec 27, 2016
Deposit Date Apr 24, 2017
Publicly Available Date Apr 24, 2017
Journal Physical Review D
Print ISSN 2470-0010
Electronic ISSN 2470-0029
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 94
Issue 11
Article Number 116017
DOI https://doi.org/10.1103/PhysRevD.94.116017
Public URL https://nottingham-repository.worktribe.com/output/832073
Publisher URL https://journals.aps.org/prd/abstract/10.1103/PhysRevD.94.116017
Additional Information Erratum: Phys. Rev.D95,no.3,039902(2017)
(Not an erratum: publisher had published in the wrong section of the journal, then made an editorial note/erratum in the correct section at a later date (21/02/17) stating: "This paper was inadvertently published online on 27 December 2016 in the wrong issue of the journal (Issue 11: D1 instead of Issue 12: D15). This Note is being published in Issue 4 to call the article to the attention of interested readers. We regret the error.")

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