منابع مشابه
Conformally Coupled Inflation
A massive scalar field in a curved spacetime can propagate along the light cone, a causal pathology, which can, in principle, be eliminated only if the scalar couples conformally to the Ricci curvature of spacetime. This property mandates conformal coupling for the field driving inflation in the early universe. During slow-roll inflation, this coupling can cause super-acceleration and, as a sig...
متن کاملCoupled inflation and brane gases
Tirthabir Biswas,* Robert Brandenberger, Damien A. Easson, and Anupam Mazumdar4,5,x Department of Physics, McGill University, Montréal, Quebec, Canada H3A 2T8 Department of Physics, Brown University, Providence, Rhode Island 02912, USA Department of Physics, Syracuse University, Syracuse, New York 13244, USA NORDITA, Blegdamsvej 17, Copenhagen 2100, Denmark The Niels Bohr Institute, Blegdamsvej...
متن کاملExtended inflation with a curvature-coupled inflaton.
We examine extended inflation models enhanced by the addition of a coupling between the inflaton field and the space-time curvature. We examine two types of model, where the underlying inflaton potential takes on second-order and first-order form respectively. One aim is to provide models which satisfy the solar system constraints on the Brans– Dicke parameter ω. This constraint has proven very...
متن کاملFresh inflation with nonminimally coupled inflaton field
I study a fresh inflationary model with a scalar field nonminimally coupled to gravity. An example is examined. I find that, as larger is the value of p (a ∼ tp), smaller (but larger in its absolute value) is the necessary value of the coupling ξ to the inflaton field fluctuations can satisfy a scale invariant power spectrum.
متن کاملDynamics of Coupled Cell Networks: Synchrony, Heteroclinic Cycles and Inflation
We consider the dynamics of small networks of coupled cells. We usually assume asymmetric inputs and no global or local symmetries in the network and consider equivalence of networks in this setting; that is, when two networks with different architectures give rise to the same set of possible dynamics. Focusing on transitive (strongly connected) networks that have only one type of cell (identic...
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ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2016
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2016/03/006