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13 papers · 1 filter
Invariant construction of solutions to Einstein`s field equations - LRS perfect fluids I
Mattias Marklund
The properties of some locally rotationally symmetric (LRS) perfect fluid space-times are examined in order to demonstrate the usage of the description of geometries in terms of th…
A Local Variational Theory for the Schmidt metric
Fredrik Ståhl
We study local variations of causal curves in a space-time with respect to b-length (or generalised affine parameter length). In a convex normal neighbourhood, causal curves of max…
Rotating matter in general relativity -- stationary state I
Mattias Marklund, Zoltan Perjes
Stationary rotating matter configurations in general relativity are considered. A formalism for general stationary space times is developed. Axisymmetric systems are discussed by t…
Monte Carlo study of the Villain version of the fully frustrated XY model
Peter Olsson
The fully frustrated XY model with Villain interaction on a square lattice is studied by means of Monte Carlo simulations. On the basis of the universal jump condition it is argued…
Tunneling with the Lorentz Force and the Friction
Ping Ao
We present a semiclassical study of a transport process, the tunneling, in the presence of a magnetic field and a dissipative environment. We have found that the problem can be map…
Hall effect and geometric phases in Josephson junction arrays
P. Ao, Y. Tan, X. -M. Zhu
Since effectively the local contact vortex velocity dependent part of the Magnus force in a Josephson junction array is zero in the classical limit, we predict zero classical Hall…