Chaotic initial conditions for nonminimally coupled inflation via a conformal factor with a zero
نویسندگان
چکیده
منابع مشابه
Chaotic Initial Conditions for Non-Minimally Coupled Inflation via a Conformal Factor with a Zero
Jinsu Kim1, ∗ and John McDonald2, † 1Quantum Universe Center, Korea Institute for Advanced Study, Seoul 02455, Korea 2Dept. of Physics, University of Lancaster, Lancaster LA1 4YB, UK Non-minimally coupled inflation models based on a non-minimal coupling ξφ2R and a φ4 potential are in excellent agreement with the scalar spectral index observed by Planck. Here we consider the modification of thes...
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 کاملInitial conditions for inflation
Free scalar fields in de Sitter space have a one-parameter family of states invariant under the de Sitter group, including the standard thermal vacuum. We show that, except for the thermal vacuum, these states are unphysical when gravitational interactions are included. We apply these observations to the quantum state of the inflaton, and find that at best, dramatic fine tuning is required for ...
متن کاملNew inflation in supergravity with a chaotic initial condition
We propose a self-consistent scenario of new inflation in supergravity. Chaotic inflation first takes place around the Planck scale, which solves the longevity problem, namely, why the universe can live much beyond the Planck time, and also gives an adequate initial condition for new inflation. Then, new inflation lasts long enough to generate primordial fluctuations for the large scale structu...
متن کاملInitial Conditions for Vector Inflation
Recently, a model of inflation using non-minimally coupled massive vector fields has been proposed. For a particular choice of non-minimal coupling parameter and for a flat FRW model, the model is reduced to the model of chaotic inflation with massive scalar field. We study the effect of non-zero curvature of the universe on the onset of vector inflation. We find that in a curved universe the d...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2017
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.95.103501