On perturbations of a quintom bounce

By Yi-Fu Cai, Taotao Qiu, Robert Brandenberger, Yun-Song Piao, Xinmin Zhang. 2007

155 citations recorded by the source corpus.

A quintom universe with an equation of state crossing the cosmological constant boundary can provide a bouncing solution dubbed the quintom bounce and thus resolve the big bang singularity. In this paper, we investigate the cosmological perturbations of the quintom bounce both analytically and numerically. We find that the fluctuations in the dominant mode in the post-bounce expanding phase couple to the growing mode of the perturbations in the pre-bounce contracting phase.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/42315b579f528f6adce2e5ad33d70cd9f1fba083

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Citations in the corpus

Matter bounce in Horava-Lifshitz cosmology (2009, background): “It has been shown [17, 18, 19, 20] that, provided the duration of the bounce phase is short compared to the wavelength of the fluctuations being considered, then the spectrum of curvature fluctuations is not changed during the bounce.”
Trans-Planckian issues for inflationary cosmology (2012, methodology): “One way, as explored in the quintom matter bounce scenarios [47] is to have the pre-bounce radiation come from a scalar field φ with quartic potential.”
Nonsingular cosmology with a scale-invariant spectrum of cosmological perturbations from Lee-Wick theory (2008, background): “As has recently been shown in several examples of non-singular bounces, the equation of motion for ζ develops singularities around the bounce point [41, 42, 43], whereas the equation of motion for Φ remains well defined.”
Non-singular cosmology in a model of non-relativistic gravity (2009, methodology): “The scenario of bouncing cosmology has been investigated in models motivated by various approaches to quantum gravity [18–23], and analyzed using effective field techniques by introducing energy-condition-violating matters [11, 24–26], while the generation of perturbation was studied in [27–34] (and”
Exploring bouncing cosmologies with cosmological surveys (2014, background): “They appear in many theoretical settings where either the gravitational sector is modified as in Hor̆ava gravity [56–58], non-relativistic gravitational action[59], torsion gravity [60, 61], Lagrange-multiplier gravity [62, 63], nonlinear massive gravity [64] and non-local gravity [65], or by making”