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Can Structure Formation Influence the Cosmological Evolution?
C. Wetterich
The backreaction of structure formation influences the cosmological evolution equation for the homogenous and isotropic average metric. In a cold dark matter universe this effect l…
Cosmon dark matter?
C. Wetterich
We investigate if the fluctuations of the scalar field mediating quintessence -- the cosmon -- can play an important role in cosmology. Small fluctuations with short wavelength beh…
Are Galaxies Cosmon Lumps?
C. Wetterich
The scalar ``cosmon'' field mediating quintessence influences the dynamics of extended objects in the universe. We discuss cosmon lumps -- spherically symmetric solutions for the s…
Structure Formation and the Time Dependence of Quintessence
Michael Doran, Jan-Markus Schwindt, Christof Wetterich
We discuss the influence of dark energy on structure formation, especially the effects on σ_8. Our interest is particularly focused on quintessence models with time-dependent equat…
Renormalization Flow of Bound States
Holger Gies, Christof Wetterich
A renormalization group flow equation with a scale-dependent transformation of field variables gives a unified description of fundamental and composite degrees of freedom. In the c…
The Influence of Quintessence on the Separation of CMB Peaks
Michael Doran, Matthew Lilley, Jan Schwindt +1
A hypothetical dark energy component may have an equation of state that is different from a cosmological constant and possibly even changing in time. The spacing of the cosmic micr…