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astro-ph2003★ 2.3k cited
Is Cosmic Speed-Up Due to New Gravitational Physics?
Sean M. Carroll, Vikram Duvvuri, Mark Trodden +1
We show that cosmic acceleration can arise due to very tiny corrections to the usual gravitational action of General Relativity of the form , with . This eliminates the n…
astro-ph2003★ 55 cited
Dark Energy as a Modification of the Friedmann Equation
Gia Dvali, Michael S. Turner
Dark energy could actually be the manifestation of a modification to the Friedmann equation arising from new physics (e.g., extra dimensions). Writing the correction as $(1-Ω_M)H^α…