86 citations · 419 across the 19 of their papers we have counts for
19 papers
Curvature without metric: the Penrose construction for half-flat pp-waves
Peter C. Aichelburg, Herbert Balasin
We derive the Penrose data for half-flat pp-waves and extend his original construction for the Weyl spinor of plane waves in terms of this data.
Scattering of Classical and Quantum Particles by Impulsive Fields
Herbert Balasin, Peter C. Aichelburg
We investigate the scattering of classical and quantum particles in impulsive backgrounds fields. These fields model short outbursts of radiation propagating with the speed of ligh…
On the energy-momentum tensor in Moyal space
Herbert Balasin, Daniel N. Blaschke, Francois Gieres +1
We study the properties of the energy-momentum tensor of gauge fields coupled to matter in non-commutative (Moyal) space. In general, the non-commutativity affects the usual conser…
Wong's Equations and Charged Relativistic Particles in Non-Commutative Space
Herbert Balasin, Daniel N. Blaschke, Francois Gieres +1
In analogy to Wong's equations describing the motion of a charged relativistic point particle in the presence of an external Yang-Mills field, we discuss the motion of such a parti…
Timescape realized
Herbert Balasin
We discuss a concrete proposal to realize the observer dependence of expansion redshift employing a map that relates static to conformally static geometries. This provides a manife…
Simplified Hamiltonian constraint for a particular value of the Barbero--Immirzi parameter
H. Balasin, W. Wieland
We show that within the Ashtekar formulation of General Relativity a considerably simple and compact form of the Lorentzian Hamiltonian constraint occurs for a particular value of…