DSR as an explanation of cosmological structure

Abstract

Deformed special relativity (DSR) is one of the possible realizations of a varying speed of light (VSL). It deforms the usual quadratic dispersion relations so that the speed of light becomes energy dependent, with preferred frames avoided by postulating a non-linear representation of the Lorentz group. The theory may be used to induce a varying speed of sound capable of generating (near) scale-invariant density fluctuations, as discussed in a recent Letter. We identify the non-linear representation of the Lorentz group that leads to scale-invariance, finding a universal result. We also examine the higher order field theory that could be set up to represent it.

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Cited by in corpus (22)

• Dimension and Dimensional Reduction in Quantum Gravity
• Primordial Perturbation in Horava-Lifshitz Cosmology
• Hamilton geometry: Phase space geometry from modified dispersion relations
• Multi-scale gravity and cosmology
• Rainbow gravity and scale-invariant fluctuations
• Dimensional reduction in the sky
• Quantum gravity and gravitational-wave astronomy
• Intermediate inflation from rainbow gravity
• Bimetric structure formation: non-Gaussian predictions
• Planck-scale dimensional reduction without a preferred frame
• On Primordial Density Perturbation and Decaying Speed of Sound
• Varying electric charge in multiscale spacetimes
• Kinematics of particles with quantum de Sitter symmetries
• Gravity as the breakdown of conformal invariance
• Observational constraints on dual intermediate inflation
• Bayesian evidence and predictivity of the inflationary paradigm
• The phenomenology of squeezing and its status in non-inflationary theories
• Primordial perturbations in a rainbow universe with running Newton constant
• Reappraisal of a model for deformed special relativity
• Modified dispersion relations, inflation and scale invariance
• Squeezing of scalar and tensor primordial perturbations generated by modified dispersion relations
• Nearly scale-invariant power spectrum and quantum cosmological perturbations in the gravity's rainbow scenario