Geometry for the accelerating universe

Abstract

The Lorentzian spacetime metric is replaced by an area metric which naturally emerges as a generalized geometry in quantum string and gauge theory. Employing the area metric curvature scalar, the gravitational Einstein-Hilbert action is re-interpreted as dynamics for an area metric. Without the need for dark energy or fine-tuning, area metric cosmology explains the observed small acceleration of the late Universe.

4 pages, 1 figure

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• Area metric gravity and accelerating cosmology
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Cited by in corpus (16)

• How to Distinguish Dark Energy and Modified Gravity?
• Geodesics and the magnitude-redshift relation on cosmologically symmetric Finsler spacetimes
• Causal structure and algebraic classification of area metric spacetimes in four dimensions
• Propagation of light in area metric backgrounds
• From spin foams to area metric dynamics to gravitons
• Towards effective actions for the continuum limit of spin foams
• Radiation-dominated area metric cosmology
• Consistent matter couplings for Plebanski gravity
• Repulsive gravity model for dark energy
• Brans-Dicke geometry
• Area-metric gravity revisited
• Massive motion in Brans-Dicke geometry and beyond
• Multimetric extension of the PPN formalism: experimental consistency of repulsive gravity
• From area metric backgrounds to the cosmological constant and corrections to the Polyakov action
• Quantum Theory, Gravity and Second Order Geometry
• Loop Special Relativity: Kaluza-Klein area metric as a line element for stringy events