Decoherence of coupled electron spins via nuclear spin dynamics in quantum dots
| dc.creator | Yang, W. | |
| dc.creator | Liu, R. B. | |
| dc.date | 2007-07-17 | |
| dc.date.accessioned | 2026-07-07T09:25:04Z | |
| dc.date.available | 2026-07-07T09:25:04Z | |
| dc.description | In double quantum dots, the exchange interaction between two electron spins renormalizes the excitation energy of pair-flips in the nuclear spin bath, which in turn modifies the non-Markovian bath dynamics. As the energy renormalization varies with the Overhauser field mismatch between the quantum dots, the electron singlet-triplet decoherence resulting from the bath dynamics depends on sampling of nuclear spin states from an ensemble, leading to the transition from exponential decoherence in single-sample dynamics to power-law decay under ensemble averaging. In contrast, the decoherence of a single electron spin in one dot is essentially the same for different choices of the nuclear spin configuration. | |
| dc.description | 4 pages 3 figures | |
| dc.identifier | https://arxiv.org/abs/0707.2529 | |
| dc.identifier | http://arxiv.org/abs/0707.2529 | |
| dc.identifier | PHYSICAL REVIEW B 77, 085302 (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.77.085302 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/156284 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Decoherence of coupled electron spins via nuclear spin dynamics in quantum dots | |
| dc.type | text |