FAST TRACK COMMUNICATION: DSR as an explanation of cosmological structure

Details FAST TRACK COMMUNICATION: DSR as an explanation of cosmological structure FAST TRACK COMMUNICATION: DSR as an explanation of cosmological structure

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cqgra..25t2002m&link_type=abstract

Classical and Quantum Gravity, Volume 25, Issue 20, pp. 202002 (2008).

Computer Science

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Scientific paper

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 nonlinear 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 nonlinear 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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