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Dynamical systems i...
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Alho, ArturUniversity Lisbon, PRT
(författare)
Dynamical systems in perturbative scalar field cosmology
- Artikel/kapitelEngelska2020
Förlag, utgivningsår, omfång ...
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2020-10-21
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American Institute of Physics (AIP),2020
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kau-81219
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https://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-81219URI
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https://doi.org/10.1088/1361-6382/abb73aDOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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We derive a newregulardynamical system on a three-dimensionalcompactstate space describing linear scalar perturbations of spatially flat Robertson-Walker geometries for relativistic models with a minimally coupled scalar field with an exponential potential. This enables us to construct the global solution space, illustrated with figures, where known solutions are shown to reside on special invariant sets. We also use our dynamical systems approach to obtain new results about the comoving and uniform density curvature perturbations. Finally we show how to extend our approach to more general scalar field potentials. This leads to state spaces where the state space of the models with an exponential potential appears as invariant boundary sets, thereby illustrating their role as building blocks in a hierarchy of increasingly complex cosmological models.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Uggla, Claes,1957-Karlstads universitet,Institutionen för ingenjörsvetenskap och fysik (from 2013)(Swepub:kau)claeuggl
(författare)
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Wainwright, JohnUniversity Waterloo, CAN
(författare)
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University Lisbon, PRTInstitutionen för ingenjörsvetenskap och fysik (from 2013)
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Classical and quantum gravity: American Institute of Physics (AIP)37:220264-93811361-6382
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