Optimal tracking for pairs of qubit states
| dc.creator | Mendonca, Paulo E. M. F. | |
| dc.creator | Gilchrist, Alexei | |
| dc.creator | Doherty, Andrew C. | |
| dc.date | 2008-02-27 | |
| dc.date | 2008-06-03 | |
| dc.date.accessioned | 2026-07-07T10:19:18Z | |
| dc.date.available | 2026-07-07T10:19:18Z | |
| dc.description | In classical control theory, tracking refers to the ability to perform measurements and feedback on a classical system in order to enforce some desired dynamics. In this paper we investigate a simple version of quantum tracking, namely, we look at how to optimally transform the state of a single qubit into a given target state, when the system can be prepared in two different ways, and the target state depends on the choice of preparation. We propose a tracking strategy that is proved to be optimal for any input and target states. Applications in the context of state discrimination, state purification, state stabilization and state-dependent quantum cloning are presented, where existing optimality results are recovered and extended. | |
| dc.description | 15 pages, 8 figures. Extensive revision of text, optimality results extended, other physical applications included | |
| dc.identifier | https://arxiv.org/abs/0802.3896 | |
| dc.identifier | http://arxiv.org/abs/0802.3896 | |
| dc.identifier | Phys. Rev. A, 78, 012319 (2008) | |
| dc.identifier | doi:10.1103/PhysRevA.78.012319 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/174460 | |
| dc.subject | Quantum Physics | |
| dc.title | Optimal tracking for pairs of qubit states | |
| dc.type | text |