arXiv subjects

K. Arthur

Publications and source records attributed to K. Arthur.

4 recordsLinked to original sources

arXiv1996

Interaction energy of Chern-Simons vortices in the gauged O(3) sigma model

The purpose of this Letter is to present a computation of the interaction energy of gauged O(3) Chern-Simons vortices which are infinitely separated. The results will show the behaviour of the interaction energy as a function of the constant coupling the potential, which measures the relative strength of the matter self-coupling and the electromagnetic coupling. We find that vortices attract each other for $λ> 1 $ and repel when $λ< 1 $. When $λ=1 $ there is a topological lower bound on the energy. It is possible to saturate the bound if the fields satisfy a set of first order partial differential equations.

hep-th↗

arXiv1996

Towards a Coulomb gas of instantons in the SO(4)xU(1) Higgs model on R_4

The $SO(4)\times U(1)$ Higgs model on $\R_4$ is extended by a $F^3$ term so that the action receives a nonvanishing contribution from the interactions of 2-instantons and 3-instantons, and can be expressed as the inverse of the Laplacian on $\R_4$ in terms of the mutual distances of the instantons. The one-instanton solutions of both the basic and the extended models have been studied in detail numerically.

hep-th↗

arXiv1996

SO(3) Gauged Soliton of an O(4) Sigma Model on $R_3$

Vector $SO(3)$ gauged $O(4)$ sigma models on $\R_3$ are presented. The topological charge supplying the lower bound on the energy and rendering the soliton stable coincides with the Baryon number of the Skyrmion. These solitons have vanishing magnetic monopole flux. To exhibit the existence of such solitons, the equations of motion of one of these models is integrated numerically. The structure of the conserved Baryon current is briefly discussed.

hep-th↗

arXiv1995

Existence Theorems for $\fracπ{n}$ Vortex Scattering

The analysis of $90^{\circ}$ vortex-vortex scattering is extended to $\fracπ{n}$ scattering in all head-on collisions of $n$ vortices in the Abelian Higgs model. A Cauchy problem with initial data that describe the scattering of $n$ vortices is formulated. It is shown that this Cauchy problem has a unique global finite-energy solution. The symmetry of the solution and the form of the local analytic solution then show that $\fracπ{n}$ scattering is realised.

hep-th↗