Non-Bunch-Davies statistical anisotropies

Journal Article · Tue Jul 01 00:00:00 EDT 2014 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2014/07/004· OSTI ID:22373485

Chen, Xingang ^[1]; Wang, Yi ^[2]

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1. Department of Physics, The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75083 (United States)
2. Centre for Theoretical Cosmology, DAMTP, University of Cambridge, Wilberforce Road, Cambridge, CB3 0WA (United Kingdom)

We introduce a generic mechanism that can extend the effects of relic anisotropies at the beginning of inflation to relatively much shorter scales in density perturbations. This is induced by non-Bunch-Davies states of the quantum fluctuations, and can show up in the non-oscillatory components of the density perturbations. This mechanism works for general forms of anisotropies, and, to illustrate it, we use an example of relic vector field. The detailed scale-dependence of these anisotropies can be used to probe the initial quantum state of our universe.

• OSTI ID: 22373485
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 07; 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
ANISOTROPY
COSMOLOGICAL INFLATION
DENSITY
FLUCTUATIONS
QUANTUM STATES
UNIVERSE
VECTOR FIELDS