Scale invariant spectrum from variable speed of light metric in a bimetric gravity theory
نویسندگان
چکیده
منابع مشابه
Scale Invariant Spectrum from Variable Speed of Light Metric in a Bimetric Gravity Theory
An approximately scale invariant spectrum generating the seeds of structure formation is derived from a bimetric gravity theory. By requiring that the amplitude of the CMB fluctuations from the model matches the observed value, we determine the fundamental length scale in the model to be a factor of 10 times larger than the Planck length, which results in a scalar mode spectral index: ns ≈ 0.97...
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In the bimetric scalar-tensor gravitational theory there are two frames associated with the two metrics ĝμν and gμν , which are linked by the gradients of a scalar field φ. The choice of a comoving frame for the metric ĝμν or gμν has fundamental physical consequences for local observers in either metric spacetimes, while maintaining diffeomorphism invariance. When the metric gμν is chosen to be...
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ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2003
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2003/07/004