Results 21 to 30 of about 1,005 (182)
Journal of High Energy Physics, 2018 We propose a new model of single-field D-term inflation in supergravity, where the inflation is driven by a single modulus field which transforms non-linearly under the U(1) gauge symmetry.
Kenji Kadota +3 more
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A note on inflation in dRGT massive gravity
European Physical Journal C: Particles and Fields, 2022 Although the dRGT massive gravity successfully explains the late-time cosmic acceleration, it cannot justify inflation. On the other hand, and in the frameworks of General Relativity and modified gravity, the interests and attempts to describe dark ...
B. Afshar, N. Riazi, H. Moradpour
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Fate of inflation and the natural reduction of vacuum energy
EPJ Web of Conferences, 2014 In the standard cosmology, an artificial fine tuning of the potential is inevitable for vanishing cosmological constant, though slow-rolling uniform scalar field easily causes cosmic inflation.
Nakamichi Akika, Morikawa Masahiro
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Unified cosmology with scalar–tensor theory of gravity
European Physical Journal C: Particles and Fields, 2017 Unlike the Noether symmetry, a metric independent general conserved current exists for non-minimally coupled scalar–tensor theory of gravity if the trace of the energy-momentum tensor vanishes. Thus, in the context of cosmology, a symmetry exists both in
Behzad Tajahmad, Abhik Kumar Sanyal
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Physics Letters B, 2022 In Chain Inflation the universe tunnels along a series of false vacua of ever-decreasing energy. The main goal of this paper is to embed Chain Inflation in high energy fundamental physics.
Katherine Freese +2 more
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Can observations look back to the beginning of inflation?
Physics Letters B, 2016 The cosmic microwave background can measure the inflaton potential only if inflation lasts sufficiently long before the time of horizon crossing of observable fluctuations, such that non-linear effects in the time evolution of Green's functions lead to a
C. Wetterich
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Quintessential inflation for exponential type potentials: scaling and tracker behavior
European Physical Journal C: Particles and Fields, 2021 We will show that for exponential type potentials of the form $$V(\varphi )\sim e^{-\gamma \varphi ^n/M_{pl}^n}$$ V ( φ ) ∼ e - γ φ n / M pl n , which are used to depict quintessential inflation, the solutions whose initial conditions take place during ...
Llibert Aresté Saló, Jaume Haro
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Cosmic strings and natural inflation [PDF]
Journal of High Energy Physics, 2007 12 pages, 0 tables, 4 figures, accepted for publication in ...
openaire +3 more sources
Inflation in supersymmetric cosmic string theories [PDF]
Physics Letters B, 1999 We examine a non-Abelian SUSY $SU(2) \times U(1)$ gauge theory and a SUSY U(1) theory originally used to investigate the microphysics of cosmic strings in supersymmetric theories. We show that both theories automatically include hybrid inflation. In the latter theory we use a $D$ term to break the symmetry.
Davis, A. C., Majumdar, M.
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Evading Lyth bound in models of quintessential inflation
Physics Letters B, 2014 Quintessential inflation refers to an attempt to unify inflation and late-time cosmic acceleration using a single scalar field. In this letter we consider two different classes of quintessential inflation, one of which is based upon a Lagrangian with non-
Md. Wali Hossain +3 more
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