Bigger Rip with No Dark Energy

Abstract

By studying a modified Friedmann equation which arises in an extension of general relativity which accommodates a time-dependent fundamental length $L(t)$, we consider cosmological models where the scale factor diverges with an essential singularity at a finite future time. Such models have no dark energy in the conventional sense of energy possessing a truly simple pressure-energy relationship. Data on supernovae restrict the time from the present until the Rip to be generically longer than the current age of the Universe.

10 pages latex including 2 figures. Grammar improved. References added

References in corpus (5)

• Phantom Energy and Cosmic Doomsday
• How to Test Stringy Dark Energy?
• The Fate of Dark Energy
• Stability Issues for w < -1 Dark Energy
• Cosmic Degeneracy with Dark Energy Equation of State

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• Cyclic Cosmology from the Little Rip
• Holographic Principle, Cosmological Constant and Cyclic Cosmology
• $C$-field cosmological models: revisited
• Dark Energy and Life's Ultimate Future