Dynamics of CP^1 lumps on a cylinder

Details Dynamics of CP^1 lumps on a cylinder Dynamics of CP^1 lumps on a cylinder

2004-04-02

arxiv.org/abs/math-ph/0404008v1

J.Geom.Phys.54:42-76,2005

Physics

Mathematical Physics

35 pages, 10 figures

Scientific paper

10.1016/j.geomphys.2004.08.002

The slow dynamics of topological solitons in the CP^1 sigma-model, known as lumps, can be approximated by the geodesic flow of the L^2 metric on certain moduli spaces of holomorphic maps. In the present work, we consider the dynamics of lumps on an infinite flat cylinder, and we show that in this case the approximation can be formulated naturally in terms of regular Kaehler metrics. We prove that these metrics are incomplete exactly in the multilump (interacting) case. The metric for two-lumps can be computed in closed form on certain totally geodesic submanifolds using elliptic integrals; particular geodesics are determined and discussed in terms of the dynamics of interacting lumps.

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