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arxiv: hep-th/9704208 · v2 · submitted 1997-04-30 · ✦ hep-th · hep-ph

Soliton tunneling

G. K\"albermann (Faculty of Agriculture , Racah Institute of Physics , Hebrew University , Jerusalem , Israel) This is my paper
classification ✦ hep-th hep-ph
keywords solitonimpuritiesattractivefiniterepulsivetunnelingattractive-repulsivebarrier
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We present a numerical simulation of the scattering of a topological soliton off finite size attractive impurities, repulsive impurities and a combination of both. The attractive and attractive-repulsive cases show similar features to those found for $\delta$ function type of impurities. For the repulsive case, corresponding to a finite width barrier, the soliton behaves completely classically. No tunneling occurs for sub-barrier kinetic energies despite the extended nature of the soliton.

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  1. Compact structures in impurity-doped vacuumless systems

    hep-th 2026-05 unverdicted novelty 5.0

    Impurities preserving half the BPS sectors induce compact or half-compact stable vacuumless kinks in scalar models, which cannot form in impurity-free canonical cases.