Inflaton fluctuations in the presence of cosmological defects

Journal Article · Sat Nov 01 00:00:00 EDT 2014 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2014/11/023· OSTI ID:22375748

Cho, Hing-Tong; Wang, I-Chin ^[1]; Ng, Kin-Wang ^[2]

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1. Department of Physics, Tamkang University, No. 151, Yingzhuan Road, Tamsui Dist., New Taipei City 25137, Taiwan (China)
2. Institute of Physics, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei 11529, Taiwan (China)

We study quantum fluctuations of a free massless scalar field during inflation in the presence of a point, line, or plane defect such as a black hole, cosmic string, or domain wall, using a perturbative expansion in powers of small defect parameters. We provide results for the scalar two-point correlation functions that show explicitly a small violation of translational invariance during inflation.

• OSTI ID: 22375748
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 11; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BLACK HOLES
CORRELATION FUNCTIONS
CRYSTAL DEFECTS
FLUCTUATIONS
SCALAR FIELDS