Weak measurement of quantum dot spin qubits
| dc.creator | Jordan, Andrew N. | |
| dc.creator | Trauzettel, Bjoern | |
| dc.creator | Burkard, Guido | |
| dc.date | 2007-06-01 | |
| dc.date.accessioned | 2026-07-07T08:38:15Z | |
| dc.date.available | 2026-07-07T08:38:15Z | |
| dc.description | The theory of weak quantum measurements is developed for quantum dot spin qubits. Building on recent experiments, we propose a control cycle to prepare, manipulate, weakly measure, and perform quantum state tomography. This is accomplished using a combination of the physics of electron spin resonance, spin blockade, and Coulomb blockade, resulting in a charge transport process. We investigate the influence of the surrounding nuclear spin environment, and find a regime where this environment significantly simplifies the dynamics of the weak measurement process, making this theoretical proposal realistic with existing experimental technology. We further consider spin-echo refocusing to combat dephasing, as well as discuss a realization of "quantum undemolition", whereby the effects of quantum state disturbance are undone. | |
| dc.description | 8 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/0706.0180 | |
| dc.identifier | http://arxiv.org/abs/0706.0180 | |
| dc.identifier | Phys. Rev. B 76, 155324 (2007) | |
| dc.identifier | doi:10.1103/PhysRevB.76.155324 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/140660 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.subject | Quantum Physics | |
| dc.title | Weak measurement of quantum dot spin qubits | |
| dc.type | text |