2,045 research outputs found
Scaling Identities for Solitons beyond Derrick's Theorem
New integral identities satisfied by topological solitons in a range of
classical field theories are presented. They are derived by considering
independent length rescalings in orthogonal directions, or equivalently, from
the conservation of the stress tensor. These identities are refinements of
Derrick's theorem.Comment: 10 page
The dynamics of vortices on S^2 near the Bradlow limit
The explicit solutions of the Bogomolny equations for N vortices on a sphere
of radius R^2 > N are not known. In particular, this has prevented the use of
the geodesic approximation to describe the low energy vortex dynamics. In this
paper we introduce an approximate general solution of the equations, valid for
R^2 close to N, which has many properties of the true solutions, including the
same moduli space CP^N. Within the framework of the geodesic approximation, the
metric on the moduli space is then computed to be proportional to the Fubini-
Study metric, which leads to a complete description of the particle dynamics.Comment: 17 pages, 9 figure
One-vortex moduli space and Ricci flow
The metric on the moduli space of one abelian Higgs vortex on a surface has a
natural geometrical evolution as the Bradlow parameter, which determines the
vortex size, varies. It is shown by various arguments, and by calculations in
special cases, that this geometrical flow has many similarities to Ricci flow.Comment: 20 page
Volume of Vortex Moduli Spaces
A gas of Bogomol'nyi vortices in the Abelian Higgs model is studied on a
compact Riemann surface of genus and area . The volume of the moduli
space is computed and found to depend on and , but not on other
details of the shape of the surface. The volume is then used to find the
thermodynamic partition function and it is shown that the thermodynamical
properties of such a gas do not depend on the genus of the Riemann surface.Comment: LaTex file, 17 pages. To appear in Comm. Math. Phy
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