801 citations · 4.1k across the 36 of their papers we have counts for
36 papers
Ricci cosmology
Rudolf Baier, Sayantani Lahiri, Paul Romatschke
We revisit spatially flat FLRW cosmology in light of recent advances in standard model relativistic fluid dynamics. Modern fluid dynamics requires the presence of curvature-matter…
On gravitational spherical collapse without spacetime singularity
Rudolf Baier
This note discusses possible quantum effects in the context of homogeneous flat FLRW and inhomogeneous LTB gravitational spherical collapse, which lead to bounce solutions.
Light-by-Light Scattering in the Presence of Magnetic Fields
R. Baier, A. Rebhan, M. Wödlinger
The low-energy light-by-light cross section as determined by the nonlinear Euler-Heisenberg QED Lagrangian is evaluated in the presence of constant magnetic fields in the center-of…
Comment on Hawking radiation and trapping horizons
Rudolf Baier, Stefan Stricker
We consider dynamical black hole formation from a collapsing fluid described by a symmetric and flat FRW metric. Using the Hamilton-Jacobi method the local Hawking temperature for…
Scalar field collapse with negative cosmological constant
R. Baier, Hiromichi Nishimura, S. A. Stricker
The formation of black holes or naked singularities is studied in a model in which a homogeneous time-dependent scalar field with an exponential potential couples to four dimension…
Critical scalar field collapse in AdS_3: an analytic approach
Rudolf Baier, Stefan Stricker, Olli Taanila
We present an analytical solution of a massless scalar field collapsing in a three dimensional space-time with a negative cosmological constant, i.e. asymptotically AdS_3. The Eins…