Cosmology of Nonlinear Oscillations

Abstract

The nonlinear oscillations of a scalar field are shown to have cosmological equations of state with $w=p/\rho$ ranging from $-1<w<1$. We investigate the possibility that the dark energy is due to such oscillations.

arXiv comment5 pages, latex. References added; to appear in PLB

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• The Cosmological Constant and Dark Energy
• Quintessence and the Rest of the World
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• A New Cosmological Model of Quintessence and Dark Matter
• Relic Gravity Waves from Braneworld Inflation
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Cited by in corpus (9)

• Dark energy from a quintessence (phantom) field rolling near potential minimum (maximum)
• Dynamical and Gravitational Instability of Oscillating-Field Dark Energy and Dark Matter
• Cosmological perturbations in coherent oscillating scalar field models
• Evolution of Oscillating Scalar Fields as Dark Energy
• Dark radiation as a signature of dark energy
• Scalar Field Oscillations Contributing to Dark Energy
• Oscillating scalar fields in extended quintessence
• Quintessence and Thermal Matter
• The cosmological evolution of ultralight axionlike scalar fields