A non-variational method for coupling scalar fields to gravity reproduces known models and produces asymptotically Kasner Bianchi I solutions under specific conditions.
An introduction to cosmological inflation
4 Pith papers cite this work, alongside 52 external citations. Polarity classification is still indexing.
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abstract
An introductory account is given of the inflationary cosmology, which postulates a period of accelerated expansion during the Universe's earliest stages. The historical motivation is briefly outlined, and the modelling of the inflationary epoch explained. The most important aspect of inflation is that it provides a possible model for the origin of structure in the Universe, and key results are reviewed, along with a discussion of the current observational situation and outlook.
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Simulations demonstrate non-monotonic guide-field regulation of reconnection efficiency via balance between drift-kink suppression and tearing-mode hindrance in 3D relativistic current sheets.
Four new exact Bianchi I solutions in a non-variational scalar field model produce Big Bang, Big Crunch, Big Rip, and cyclic behaviors, with stability to inhomogeneous perturbations depending on singularity type.
A quartic Higgs-like inflation model with a dilaton-like Gauss-Bonnet coupling reaches nS ≈ 0.973 and r ≈ 3.6×10⁻⁴ at 70 e-folds, within the ACT DR6 bounds, after a hand-tuned parameter scan.
citing papers explorer
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A general formalism for coupling scalar fields to the Einstein equations without a variational principle
A non-variational method for coupling scalar fields to gravity reproduces known models and produces asymptotically Kasner Bianchi I solutions under specific conditions.
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Guide-Field-mediated Multiscale Instabilities in Relativistic Reconnection
Simulations demonstrate non-monotonic guide-field regulation of reconnection efficiency via balance between drift-kink suppression and tearing-mode hindrance in 3D relativistic current sheets.
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Non-variational scalar field cosmology: Exact Bianchi I solutions for near-minimal scalar fields
Four new exact Bianchi I solutions in a non-variational scalar field model produce Big Bang, Big Crunch, Big Rip, and cyclic behaviors, with stability to inhomogeneous perturbations depending on singularity type.
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Inflation with Gauss-Bonnet Correction and Higgs Potential
A quartic Higgs-like inflation model with a dilaton-like Gauss-Bonnet coupling reaches nS ≈ 0.973 and r ≈ 3.6×10⁻⁴ at 70 e-folds, within the ACT DR6 bounds, after a hand-tuned parameter scan.