科研之友
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摘要
It is shown that the causal structure associated to stringlike solutions of the Faddeev-Niemi model is described by an effective metric. Remarkably, the surfaces characterizing the causal replacement depend on the energy momentum tensor of the background soliton and carry implicitly a topological invariant pi(3)(S-2). As a consequence, it follows that the preimage curves in R-3 nontrivially define directions where the cones remain unchanged. We expect that these early results may be of importance in understanding time dependent solutions (collisions/scatterings) numerically or analytically.
- 出版日期2015-2-23
