Quantum induced w = -1 crossing of the quintessence and phantom models

Abstract

Considering the single scalar field models of dark energy, i.e. the quintessence and phantom models, it is shown that the quantum effects can cause the system crosses the w = -1 line. This phenomenon does not occur in classical level. The quantum effects are described via the account of conformal anomaly.

LaTex, 7 pages, the version to be appeared in JCAP (2009)

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• Remarks on generalized Gauss-Bonnet dark energy
• The phase-space of generalized Gauss-Bonnet dark energy
• Gaussian-process reconstructions and model building of quintom dark energy from latest cosmological observations
• Remarks on generalized scalar-tensor models of dark energy