Cosmology in Mimetic SU(2) Gauge Theory

Abstract

It is well known that the standard scalar field mimetic cosmology provides a dark matter-like energy density component. Considering $SU(2)$ gauge symmetry, we study the gauge field extension of the mimetic scenario in spatially flat and curved FLRW spacetimes. Because of the mimetic constraint, the standard Yang-Mills term plays the role of the cosmological constant while the mimetic term provides two different contributions: one is the standard radiation scaling like $a^{-4}$ while the other contribution in energy density scales as $\propto a^{-2}$. Consequently, in the Friedmann equation we have two different energy densities which scale as $\propto a^{-2}$: one is the mimetic spatial curvature-like and the other is the standard spatial curvature which can compete with each other. The degeneracy between these two contributions are disentangled in this scenario since the mimetic spatial curvature-like term shows up only at the dynamical level while the standard spatial curvature term shows up at both dynamical and kinematical levels.

arXiv comment18 pages, 14 figures

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Cited by in corpus (19)

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• Event Horizon Telescope observations exclude compact objects in baseline mimetic gravity
• Mimetic Black Holes
• Disforming to Conformal Symmetry
• Mimetic Black Strings
• Disformal map and Petrov classification in modified gravity
• Mimetic gravity in $(2+1)$-dimensions
• Mimetic Inflation
• New anisotropic star solutions in mimetic gravity
• Topological black holes in mimetic gravity
• Structure formation in mimetic gravity
• Dynamics of inflation with mutually orthogonal vector fields in a closed universe
• Multi-field Mimetic Gravity
• Mimetic-Metric-Torsion with induced Axial mode and Phantom barrier crossing
• Isotropic stellar model in mimetic theory
• Higher dimensional charged static and rotating solutions in mimetic gravity
• Matter production effects and interacting scenario within a reconstructed mimetic cosmology for late times
• K-nonizing
• Noether currents in theories with higher derivatives and theories with differential field transformation in action (DFTA)