skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: New type of hill-top inflation

Abstract

We suggest a new type of hill-top inflation originating from the initial conditions in the form of the microcanonical density matrix for the cosmological model with a large number of quantum fields conformally coupled to gravity. Initial conditions for inflation are set up by cosmological instantons describing underbarrier oscillations in the vicinity of the inflaton potential maximum. These periodic oscillations of the inflaton field and cosmological scale factor are obtained within the approximation of two coupled oscillators subject to the slow roll regime in the Euclidean time. This regime is characterized by rapid oscillations of the scale factor on the background of a slowly varying inflaton, which guarantees smallness of slow roll parameters ϵ and η of the following inflation stage. A hill-like shape of the inflaton potential is shown to be generated by logarithmic loop corrections to the tree-level asymptotically shift-invariant potential in the non-minimal Higgs inflation model and R{sup 2}-gravity. The solution to the problem of hierarchy between the Planckian scale and the inflation scale is discussed within the concept of conformal higher spin fields, which also suggests the mechanism bringing the model below the gravitational cutoff and, thus, protecting it from large graviton loop corrections.

Authors:
 [1];  [2];  [3];  [4];  [2];  [1]
  1. Theory Department, Lebedev Physics Institute,Leninsky Prospect 53, Moscow 119991 (Russian Federation)
  2. (Russian Federation)
  3. (Canada)
  4. Dipartimento di Fisica and INFN,via Irnerio 46, 40126 Bologna (Italy)
Publication Date:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22458427
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2016; Journal Issue: 01; Other Information: PUBLISHER-ID: JCAP01(2016)036; OAI: oai:repo.scoap3.org:13508; Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSMOLOGICAL INFLATION; COSMOLOGICAL MODELS; DENSITY MATRIX; EUCLIDEAN SPACE; GRAVITATION; HIGGS BOSONS; INSTANTONS; MATHEMATICAL SOLUTIONS; OSCILLATIONS; OSCILLATORS; SPIN

Citation Formats

Barvinsky, A.O., Department of Physics, Tomsk State University,Lenin Ave. 36, Tomsk 634050, Department of Physics and Astronomy, Pacific Institue for Theoretical Physics,University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Kamenshchik, A.Yu., L.D. Landau Institute for Theoretical Physcis,Kosygin str. 2, 119334 Moscow, and Nesterov, D.V.. New type of hill-top inflation. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/01/036.
Barvinsky, A.O., Department of Physics, Tomsk State University,Lenin Ave. 36, Tomsk 634050, Department of Physics and Astronomy, Pacific Institue for Theoretical Physics,University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Kamenshchik, A.Yu., L.D. Landau Institute for Theoretical Physcis,Kosygin str. 2, 119334 Moscow, & Nesterov, D.V.. New type of hill-top inflation. United States. doi:10.1088/1475-7516/2016/01/036.
Barvinsky, A.O., Department of Physics, Tomsk State University,Lenin Ave. 36, Tomsk 634050, Department of Physics and Astronomy, Pacific Institue for Theoretical Physics,University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Kamenshchik, A.Yu., L.D. Landau Institute for Theoretical Physcis,Kosygin str. 2, 119334 Moscow, and Nesterov, D.V.. Wed . "New type of hill-top inflation". United States. doi:10.1088/1475-7516/2016/01/036.
@article{osti_22458427,
title = {New type of hill-top inflation},
author = {Barvinsky, A.O. and Department of Physics, Tomsk State University,Lenin Ave. 36, Tomsk 634050 and Department of Physics and Astronomy, Pacific Institue for Theoretical Physics,University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1 and Kamenshchik, A.Yu. and L.D. Landau Institute for Theoretical Physcis,Kosygin str. 2, 119334 Moscow and Nesterov, D.V.},
abstractNote = {We suggest a new type of hill-top inflation originating from the initial conditions in the form of the microcanonical density matrix for the cosmological model with a large number of quantum fields conformally coupled to gravity. Initial conditions for inflation are set up by cosmological instantons describing underbarrier oscillations in the vicinity of the inflaton potential maximum. These periodic oscillations of the inflaton field and cosmological scale factor are obtained within the approximation of two coupled oscillators subject to the slow roll regime in the Euclidean time. This regime is characterized by rapid oscillations of the scale factor on the background of a slowly varying inflaton, which guarantees smallness of slow roll parameters ϵ and η of the following inflation stage. A hill-like shape of the inflaton potential is shown to be generated by logarithmic loop corrections to the tree-level asymptotically shift-invariant potential in the non-minimal Higgs inflation model and R{sup 2}-gravity. The solution to the problem of hierarchy between the Planckian scale and the inflation scale is discussed within the concept of conformal higher spin fields, which also suggests the mechanism bringing the model below the gravitational cutoff and, thus, protecting it from large graviton loop corrections.},
doi = {10.1088/1475-7516/2016/01/036},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 01,
volume = 2016,
place = {United States},
year = {Wed Jan 20 00:00:00 EST 2016},
month = {Wed Jan 20 00:00:00 EST 2016}
}