Diffusive spin transport
| dc.creator | Mueller, Cord A. | |
| dc.date | 2007-08-10 | |
| dc.date | 2009-03-15 | |
| dc.date.accessioned | 2026-07-07T12:52:06Z | |
| dc.date.available | 2026-07-07T12:52:06Z | |
| dc.description | Information to be stored and transported requires physical carriers. The quantum bit of information (qubit) can for instance be realised as the spin 1/2 degree of freedom of a massive particle like an electron or as the spin 1 polarisation of a massless photon. In this lecture, I first use irreducible representations of the rotation group to characterise the spin dynamics in a least redundant manner. Specifically, I describe the decoherence dynamics of an arbitrary spin S coupled to a randomly fluctuating magnetic field in the Liouville space formalism. Secondly, I discuss the diffusive dynamics of the particle's position in space due to the presence of randomly placed impurities. Combining these two dynamics yields a coherent, unified picture of diffusive spin transport, as applicable to mesoscopic electronic devices or photons propagating in cold atomic clouds. | |
| dc.description | Lecture notes, published in A. Buchleitner, C. Viviescas, and M. Tiersch (Eds.), "Entanglement and Decoherence. Foundations and Modern Trends", Lecture Notes in Physics 768, Springer, Berlin (2009) | |
| dc.identifier | https://arxiv.org/abs/0708.1409 | |
| dc.identifier | http://arxiv.org/abs/0708.1409 | |
| dc.identifier | Lect. Notes Phys. 768, 277-314 (2009) | |
| dc.identifier | doi:10.1007/978-3-540-88169-8_6 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/223196 | |
| dc.subject | Quantum Physics | |
| dc.title | Diffusive spin transport | |
| dc.type | text |