Trapping and Steering on Lattice Strings: Virtual Slow Waves, Directional and Non-propagating Excitations

Details Trapping and Steering on Lattice Strings: Virtual Slow Waves, Directional and Non-propagating Excitations Trapping and Steering on Lattice Strings: Virtual Slow Waves, Directional and Non-propagating Excitations

2003-11-16

arxiv.org/abs/physics/0311077v2

Phys. Rev. E 69, 066601 (2004)

Physics

Classical Physics

16 pages, 5 figures, RevTex4, references added, figure captions improved, to appear in Physical Review E

Scientific paper

10.1103/PhysRevE.69.066601

Using a lattice string model, a number of peculiar excitation situations related to non-propagating excitations and non-radiating sources are demonstrated. External fields can be used to trap excitations locally but also lead to the ability to steer such excitations dynamically as long as the steering is slower than the field's wave propagation. I present explicit constructions of a number of examples, including temporally limited non-propagating excitations, directional excitation and virtually slowed propagation. Using these dynamical lattice constructions I demonstrate that neither persistent temporal oscillation nor static localization are necessary for non-propagating excitations to occur.

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