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Stable cosmology in ghost-free quasidilaton theory

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Stable cosmology in ghost-free quasidilaton theory. / Gumrukcuoglu, Emir; Koyama, Kazuya; Mukohyama, Shinji.

In: Physical Review D, Vol. 96, No. 4, 29.08.2017.

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Gumrukcuoglu, Emir ; Koyama, Kazuya ; Mukohyama, Shinji. / Stable cosmology in ghost-free quasidilaton theory. In: Physical Review D. 2017 ; Vol. 96, No. 4.

Bibtex

@article{6aaaf5823a494525af3d94ea3600fbf3,
title = "Stable cosmology in ghost-free quasidilaton theory",
abstract = "We present a novel cosmological solution in the framework of extended quasidilaton theory which underwent scrutiny recently. We only consider terms that do not generate the Boulware-Deser degree of freedom, hence the {"}ghost-free{"} quasidilaton theory, and show three new branches of cosmological evolution therein. One of the solutions passes the perturbative stability tests. This new solution exhibits a late time self-acceleration and all graviton polarizations acquire masses that converge to a constant in the asymptotic future. Moreover, all modes propagate at the speed of light. We propose that this solution can be used as a benchmark model for future phenomenological studies.",
keywords = "hep-th, astro-ph.CO, gr-qc, RCUK, STFC, ST/L00044X/1, ST/N000668/1",
author = "Emir Gumrukcuoglu and Kazuya Koyama and Shinji Mukohyama",
note = "12 pages",
year = "2017",
month = aug,
day = "29",
doi = "10.1103/PhysRevD.96.044041",
language = "English",
volume = "96",
journal = "Physical Review D",
issn = "1550-7998",
publisher = "American Institute of Physics Publising LLC",
number = "4",

}

RIS

TY - JOUR

T1 - Stable cosmology in ghost-free quasidilaton theory

AU - Gumrukcuoglu, Emir

AU - Koyama, Kazuya

AU - Mukohyama, Shinji

N1 - 12 pages

PY - 2017/8/29

Y1 - 2017/8/29

N2 - We present a novel cosmological solution in the framework of extended quasidilaton theory which underwent scrutiny recently. We only consider terms that do not generate the Boulware-Deser degree of freedom, hence the "ghost-free" quasidilaton theory, and show three new branches of cosmological evolution therein. One of the solutions passes the perturbative stability tests. This new solution exhibits a late time self-acceleration and all graviton polarizations acquire masses that converge to a constant in the asymptotic future. Moreover, all modes propagate at the speed of light. We propose that this solution can be used as a benchmark model for future phenomenological studies.

AB - We present a novel cosmological solution in the framework of extended quasidilaton theory which underwent scrutiny recently. We only consider terms that do not generate the Boulware-Deser degree of freedom, hence the "ghost-free" quasidilaton theory, and show three new branches of cosmological evolution therein. One of the solutions passes the perturbative stability tests. This new solution exhibits a late time self-acceleration and all graviton polarizations acquire masses that converge to a constant in the asymptotic future. Moreover, all modes propagate at the speed of light. We propose that this solution can be used as a benchmark model for future phenomenological studies.

KW - hep-th

KW - astro-ph.CO

KW - gr-qc

KW - RCUK

KW - STFC

KW - ST/L00044X/1

KW - ST/N000668/1

U2 - 10.1103/PhysRevD.96.044041

DO - 10.1103/PhysRevD.96.044041

M3 - Article

VL - 96

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 4

ER -

ID: 7584195