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Nonlinear matter spectra in growing neutrino quintessence
N. Brouzakis, V. Pettorino, N. Tetradis +1
We investigate the nonlinear power spectra of density perturbations and acoustic oscillations in growing neutrino quintessence. In this scenario, the neutrino mass has a strong dep…
Fermions from classical statistics
C. Wetterich
We describe fermions in terms of a classical statistical ensemble. The states of this ensemble are characterized by a sequence of values one or zero or a corresponding set of t…
Warping with dilatation symmetry and self-tuning of the cosmological constant
C. Wetterich
We investigate consequences of an ultraviolet fixed point in quantum gravity for the cosmological constant. For this purpose we perform dimensional reduction of a general dilatatio…
Quantum particles from coarse grained classical probabilities in phase space
C. Wetterich
Quantum particles can be obtained from a classical probability distribution in phase space by a suitable coarse graining, whereby simultaneous classical information about position…
Four-point vertex in the Hubbard model and partial bosonization
S. Friederich, H. C. Krahl, C. Wetterich
Magnetic and superconducting instabilities in the two-dimensional t-t'-Hubbard model are discussed within a functional renormalization group approach. The fermionic four-point vert…
Quantum particles from classical probabilities in phase space
C. Wetterich
Quantum particles in a potential are described by classical statistical probabilities. We formulate a basic time evolution law for the probability distribution of classical positio…