Exponential decay in a spin bath
| dc.creator | Coish, W. A. | |
| dc.creator | Fischer, Jan | |
| dc.creator | Loss, Daniel | |
| dc.date | 2007-10-19 | |
| dc.date | 2008-02-12 | |
| dc.date.accessioned | 2026-07-07T09:30:20Z | |
| dc.date.available | 2026-07-07T09:30:20Z | |
| dc.description | We show that the coherence of an electron spin interacting with a bath of nuclear spins can exhibit a well-defined purely exponential decay for special (`narrowed') bath initial conditions in the presence of a strong applied magnetic field. This is in contrast to the typical case, where spin-bath dynamics have been investigated in the non-Markovian limit, giving super-exponential or power-law decay of correlation functions. We calculate the relevant decoherence time T_2 explicitly for free-induction decay and find a simple expression with dependence on bath polarization, magnetic field, the shape of the electron wave function, dimensionality, total nuclear spin I, and isotopic concentration for experimentally relevant heteronuclear spin systems. | |
| dc.description | 4+ pages, 3 figures; v2: 9 pages, 3 figures (added four appendices with extensive technical details, version to appear in Phys. Rev. B) | |
| dc.identifier | https://arxiv.org/abs/0710.3762 | |
| dc.identifier | http://arxiv.org/abs/0710.3762 | |
| dc.identifier | Phys. Rev. B 77, 125329 (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.77.125329 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/158089 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.subject | Quantum Physics | |
| dc.title | Exponential decay in a spin bath | |
| dc.type | text |