Particle Localization by Decoherence and Classical Lensing
| dc.creator | Knittel, Ivo | |
| dc.date | 2007-02-20 | |
| dc.date.accessioned | 2026-07-07T07:47:53Z | |
| dc.date.available | 2026-07-07T07:47:53Z | |
| dc.description | A phenomenological model of the time evolution of a particle wavepacket is presented that is subject to scattering event with small momentum transfer. It is suited for three dimensions and allows for an additional potential. For a random value of a phase parameter, it is equivalent to the decoherence by scattering off plane wave field states. Imposing some condition on the same phase parameter, the model delivers definite outcomes in a local pointer base. Common sense notions about the quantum-classical transition are readily obtained: Decoherent free particle solutions are localized constant-width wavepackets, quantum barrier scattering results in random reflection and transmission. The scattering process assumed in the phenomenological model is realized by scattering of a particle pair interacting by a force-distance law with small momentum transfer. Particles are localized not by decoherence but by a classical lensing effect. Schmidt paths in the Schmidt representation of the multiparticle state are products of single-particle wavepackets. Therefore the model has a natural 'Many Worlds' interpretation, identifying each Schmidt path with a classical branch. Different runs of the phenomenological model map the state of the same particular particle within different branches. | |
| dc.description | submitted to Phys. Rev. A | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0702197 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0702197 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/124316 | |
| dc.subject | Quantum Physics | |
| dc.title | Particle Localization by Decoherence and Classical Lensing | |
| dc.type | text |