Published November 1, 2018 | Version v1
Journal article

Preinflationary dynamics in loop quantum cosmology: monodromy potential

  • 1. Institute for Advanced Physics $ and $ Mathematics, Zhejiang University of Technology, Hangzhou, 310023 (China)

Description

In this article we explore the pre-inflationary background dynamics of an FLRW universe sourced by a scalar field with monodromy potential in LQC framework. In particular we calculate the number of e-folds, Ninf, produced during the slowly rolling phase of the inflation and find out the critical value of the ratio of the kinetic to potential energy, rwc, at the quantum bounce that is required to produce Ninf 60. Two different monodromy potentials, namely, linear and quadratic with a modulation term are investigated to this effect. The effects on the value of Ninf due to parameters associated with the strength, decay constant and the phase factor of the modulation term are calculated. In addition to this we present the qualitative picture of the background dynamics by carrying out a dynamical system analysis. We produce the phase portraits and carry out a detailed linear stability analysis of the finite fixed points, if any, for each of the potentials.

Availability note (English)

Available from http://dx.doi.org/10.1088/1475-7516/2018/11/003

Additional details

Publishing Information

Journal Title
Journal of Cosmology and Astroparticle Physics
Journal Volume
2018
Journal Issue
11
Journal Page Range
p. 003
ISSN
1475-7516

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
51057569
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
COSMOLOGICAL INFLATION; DECAY; DYNAMICAL SYSTEMS; METRICS; MODULATION; POTENTIAL ENERGY; POWER FACTOR; QUANTUM COSMOLOGY; SCALAR FIELDS; SYSTEMS ANALYSIS; UNIVERSE
Descriptors DEC
COSMOLOGY; DIMENSIONLESS NUMBERS; ENERGY