A Critical Review of Classical Bouncing Cosmologies

  title={A Critical Review of Classical Bouncing Cosmologies},
  author={Diana Battefeld and Patrick Peter},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},

Large scale anomalies in the CMB and non-Gaussianity in bouncing cosmologies

We propose that several of the anomalies that have been observed at large angular scales in the CMB have a common origin in a cosmic bounce that took place before the inflationary era. The bounce

Viable bounce from non-minimal inflation

This paper constructs a classical bouncing model from a non-minimal slow-roll inflationary model and shows that the model is free of the above instabilities and that it leads to a smooth transition from bouncing to the traditional reheating scenario.

Quantum Effects in Cosmology

Quantum effects play an essential role in modern cosmology. Perhaps the most striking example comes from large-scale structures, generally assumed to originate from vacuum quantum fluctuations and

Matter bounce cosmology with a generalized single field: non-Gaussianity and an extended no-go theorem

We extend the matter bounce scenario to a more general theory in which the background dynamics and cosmological perturbations are generated by a k-essence scalar field with an arbitrary sound speed.

Banks-Zaks cosmology, inflation, and the Big Bang singularity

We consider the thermodynamical behavior of Banks-Zaks theory close to the conformal point in a cosmological setting. Due to the anomalous dimension, the resulting pressure and energy density deviate

Following the primordial perturbations through a bounce with AdS/CFT correspondence

A bounce universe model, known as the coupled-scalar-tachyon bounce (CSTB) universe, has been shown to solve the Horizon, Flatness and Homogeneity problems as well as the Big Bang singularity

Initial Condition of the Inflationary Universe and Its Imprint on the Cosmic Microwave Background

There is an apparent power deficit relative to the Lambda-CDM prediction of the CMB spectrum at large scales, which, though not yet statistically significant, persists from WMAP to Planck data. We

An extended matter bounce scenario: current status and challenges

As an alternative to the paradigm of slow roll inflation, we propose an extended scenario of the matter bounce cosmology in which the Universe has experienced a quasi-matter contracting phase with a

Reheating in quintessential inflation via gravitational production of heavy massive particles: a detailed analysis

An improved version of the well-known Peebles-Vilenkin model unifying early inflationary era to current cosmic acceleration, is introduced in order to match with the theoretical values of the

Cosmological Scenarios with Bounce and Genesis in Horndeski Theory and Beyond

This essay is a brief review of the recent studies of non-singular cosmological scenarios with bounce and Genesis and their stability in a subclass of scalar-tensor theories with higher derivatives



Bouncing models with a cosmological constant

Bouncing models have been proposed by many authors as a completion of, or even as an alternative to, inflation for the description of the very early and dense Universe. However, most bouncing models

Classical bounce: Constraints and consequences

We perform a detailed investigation of the simplest possible cosmological model in which a bounce can occur, namely, that where the dynamics is led by a simple massive scalar field in a general

Observational signatures of a non-singular bouncing cosmology

We study a cosmological scenario in which inflation is preceded by a bounce. In this scenario, the primordial singularity, one of the major shortcomings of inflation, is replaced by a non-singular

Galilean Genesis: An Alternative to inflation

We propose a novel cosmological scenario, in which standard inflation is replaced by an expanding phase with a drastic violation of the Null Energy Condition (NEC): >> H2. The model is based on the

Towards a nonsingular bouncing cosmology

We present a nonsingular bouncing cosmology using single scalar field matter with non-trivial potential and non-standard kinetic term. The potential sources a dynamical attractor solution with

Bouncing braneworld cosmologies and initial conditions to inflation

We examine the full nonlinear dynamics of closed Friedmann-Robertson-Walker universes in the framework of D-branes formalism. Friedmann equations contain additional terms arising from the bulk-brane

Bouncing Galileon cosmologies

We present nonsingular, homogeneous and isotropic bouncing solutions of the conformal Galileon model. We show that such solutions necessarily begin with a radiation-dominated contracting phase. This

Non-singular bounce transitions in the multiverse

According to classical GR, negative-energy (AdS) bubbles in the multiverse terminate in big crunch singularities. It has been conjectured, however, that the fundamental theory may resolve these

Regular two-component bouncing cosmologies and perturbations therein

An analytical method is presented for accurately estimating the spectrum of large-scale scalar perturbations until their re-entry, long after the bounce, and a simple way to identify non-singular gauge-invariant variables through the bounce is proposed.

Non-perturbative gravity, the Hagedorn bounce and the cosmic microwave background

In Biswas et al (2006 J. Cosmol. Astropart. Phys. JCAP03(2006)009 [hep-th/0508194]) it was shown how non-perturbative corrections to gravity can resolve the big bang singularity, leading to a