163 citations · 470 across the 11 of their papers we have counts for
11 papers
After the Dark Ages
Jürg Fröhlich
After recalling some puzzles in cosmology and briefly reviewing the Friedmann-Lemaître cosmos a simple unified model of the ``Dark Sector'' is described. This model involves a scal…
Towards a Dark Sector Model from String Theory
Heliudson Bernardo, Robert Brandenberger, Jürg Fröhlich
An embedding of a unified dark sector model into string theory with the following features is proposed: The model-independent axion descending from the Kalb-Ramond 2-form field is…
Laminar and turbulent dynamos in chiral magnetohydrodynamics. II. Simulations
Jennifer Schober, Igor Rogachevskii, Axel Brandenburg +4
Using direct numerical simulations (DNS), we study laminar and turbulent dynamos in chiral magnetohydrodynamics (MHD) with an extended set of equations that accounts for an additio…
Laminar and turbulent dynamos in chiral magnetohydrodynamics-I: Theory
I. Rogachevskii, O. Ruchayskiy, A. Boyarsky +4
The magnetohydrodynamic (MHD) description of plasmas with relativistic particles necessarily includes an additional new field, the chiral chemical potential associated with the axi…
Magnetohydrodynamics of Chiral Relativistic Fluids
Alexey Boyarsky, Jurg Frohlich, Oleg Ruchayskiy
We study the dynamics of a plasma of charged relativistic fermions at very high temperature , where is the fermion mass, coupled to the electromagnetic field. In partic…
Anderson Localization Triggered by Spin Disorder---with an Application to Eu_x Ca_1-x B_6
Daniel Egli, Jürg Fröhlich, Hans-Rudolf Ott
The phenomenon of Anderson localization is studied for a class of one-particle Schrödinger operators with random Zeeman interactions. These operators arise as follows: Static spins…
Ionization of Atoms by Intense Laser Pulses
Juerg Froehlich, Alessandro Pizzo, Benjamin Schlein
The process of ionization of a hydrogen atom by a short infrared laser pulse is studied in the regime of very large pulse intensity, in the dipole approximation. Let denote the…
Defect lines, dualities, and generalised orbifolds
Jürg Fröhlich, Jürgen Fuchs, Ingo Runkel +1
Defects are a useful tool in the study of quantum field theories. This is illustrated in the example of two-dimensional conformal field theories. We describe how defect lines and t…
Algebras in tensor categories and coset conformal field theories
J"urg Fr"ohlich, J"urgen Fuchs, Ingo Runkel +1
The coset construction is the most important tool to construct rational conformal field theories with known chiral data. For some cosets at small level, so-called maverick cosets,…
The Chern-Simons Action in Non-Commutative Geometry
A. H. Chamseddine, J. Fröhlich
A general definition of Chern-Simons actions in non-commutative geometry is proposed and illustrated in several examples. These are based on ``space-times'' which are products of e…
Some Elements of Connes' Non-Commutative Geometry, And Space-Time Geometry
A. H. Chamseddine, J. Fröhlich
Contribution to the Proceedings in honour of C.N. Yang, editor S-T Yau. To