6 papers
Magnetic Fields from Bubble Collisions - A Progress Report
Ola Tornkvist
Primordial magnetic fields may be created in collisions of expanding bubbles in a first-order cosmological phase transition and later serve as seed fields for galactic magnetic fie…
Definition of the Electromagnetic Field in the Broken-Symmetry Phase of the Electroweak Theory
Ola Tornkvist
In the broken-symmetry phase of the electroweak theory there is no unique definition of the electromagnetic field tensor in cases where the magnitude of the Higgs field differs fro…
Towards a String Formulation of Vortex Dynamics
Elsebeth Schroder, Ola Tornkvist
We derive an exact equation of motion for a non-relativistic vortex in two- and three-dimensional models with a complex field. The velocity is given in terms of gradients of the co…
Baryon Number Non-Conservation and the Topology of Gauge Fields
Minos Axenides, Andrei Johansen, Holger B. Nielsen +1
An introduction to the subject of baryon number non-conservation in the electroweak theory at high temperatures or energies is followed by a summary of our discovery of an infinite…
Instability of a Nielsen-Olesen Vortex Embedded in the Electroweak Theory: I. the Single-Component Higgs Gauge
Samuel W. MacDowell, Ola Törnkvist
The stability of an abelian (Nielsen-Olesen) vortex embedded in the electroweak theory against W production is investigated in a gauge defined by the condition of a single-componen…
Ginzburg-Landau Theory of the Electroweak Phase Transition and Analytical Results
Ola Tornkvist
The phase transition of the electroweak vacuum induced by a strong magnetic field is examined, and a connection is made with the Ginzburg-Landau theory of type-II superconductivity…