Quantum Nondemolition Measurement of a Kicked Qubit
| dc.creator | Jordan, Andrew N. | |
| dc.creator | Buttiker, Markus | |
| dc.date | 2004-06-22 | |
| dc.date.accessioned | 2026-07-07T02:58:47Z | |
| dc.date.available | 2026-07-07T02:58:47Z | |
| dc.description | We propose a quantum nondemolition measurement using a kicked two-state system (qubit). By tuning the waiting time between kicks to be the qubit oscillation period, the kicking apparatus performs a nondemolition measurement. While dephasing is unavoidable, the nondemolition measurement can (1) slow relaxation of diagonal density matrix elements, (2) avoid detector back-action, and (3) allow for a large signal-to-noise ratio. Deviations from the ideal behavior are studied by allowing for detuning of the waiting time, as well as finite-time, noisy pulses. The scheme is illustrated with a double-dot qubit measured by a gate-pulsed quantum point contact. | |
| dc.description | 7 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0406529 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0406529 | |
| dc.identifier | Phys. Rev. B 71, 125333 (2005) | |
| dc.identifier | doi:10.1103/PhysRevB.71.125333 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/24247 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.subject | Quantum Physics | |
| dc.title | Quantum Nondemolition Measurement of a Kicked Qubit | |
| dc.type | text |