C
Christian Röken
Researcher at University of Regensburg
Publications - 44
Citations - 393
Christian Röken is an academic researcher from University of Regensburg. The author has contributed to research in topics: Magnetic field & Dirac equation. The author has an hindex of 11, co-authored 43 publications receiving 331 citations. Previous affiliations of Christian Röken include Ruhr University Bochum & Aix-Marseille University.
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Divergences and orientation in spinfoams
TL;DR: In this article, it was shown that spinfoam divergences may be generated by the presence of two terms of opposite orientation in the asymptotic expansion of the vertex amplitude.
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The fermionic projector in a time-dependent external potential: Mass oscillation property and Hadamard states
TL;DR: In this paper, a non-perturbative construction of the fermionic projector in Minkowski space coupled to a time-dependent external potential is given, which is smooth and decays faster than quadratically for large times.
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Modelling black holes with angular momentum in loop quantum gravity
TL;DR: In this article, a connection formulation of Kerr isolated horizons is presented, based on a Chern-Simons theory describing the degrees of freedom on the horizon, and the presence of a non-vanishing angular momentum modifies the admissibility conditions for spin network states.
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The Fermionic Projector in a Time-Dependent External Potential: Mass Oscillation Property and Hadamard States
TL;DR: In this paper, a non-perturbative construction of the fermionic projector in Minkowski space coupled to a time-dependent external potential is given, which is smooth and decays faster than quadratically for large times.
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An exact analytical solution for the interstellar magnetic field in the vicinity of the heliosphere
TL;DR: In this article, an analytical representation of the magnetic field in the vicinity of the heliosphere is derived, and the three-dimensional field structure close to the heliopause is calculated as a solution of the induction equation under the assumption that it is frozen into a prescribed plasma flow resembling the characteristic interaction of the solar wind with the local interstellar medium.