Optimal quantum channels
| dc.contributor.author | Duvenhage, Rocco de Villiers | |
| dc.contributor.email | rocco.duvenhage@up.ac.za | en_US |
| dc.date.accessioned | 2022-10-05T12:54:12Z | |
| dc.date.available | 2022-10-05T12:54:12Z | |
| dc.date.issued | 2021-09-07 | |
| dc.description.abstract | A method to optimize the cost of a quantum channel is developed. The goal is to determine the cheapest channel that produces prescribed output states for a given set of input states. This is essentially a quantum version of optimal transport. To attach a clear conceptual meaning to the cost, channels are viewed in terms of what we call elementary transitions, which are analogous to point-to-point transitions between classical systems. The role of entanglement in optimization of cost is emphasized. We also show how our approach can be applied to theoretically search for channels performing a prescribed set of tasks on the states of a system, while otherwise disturbing the state as little as possible. | en_US |
| dc.description.department | Physics | en_US |
| dc.description.librarian | am2022 | en_US |
| dc.description.uri | http://pra.aps.org | en_US |
| dc.identifier.citation | Duvenhage, R . 2021, 'Optimal quantum channels', Physical Review A, vol. 104, no. 3, art. 032604, pp. 1-8, doi : 10.1103/PhysRevA.104.032604. | en_US |
| dc.identifier.issn | 1050-2947 (print) | |
| dc.identifier.issn | 1094-1622 (online) | |
| dc.identifier.other | 10.1103/PhysRevA.104.032604 | |
| dc.identifier.uri | https://repository.up.ac.za/handle/2263/87525 | |
| dc.language.iso | en | en_US |
| dc.publisher | American Physical Society | en_US |
| dc.rights | © 2021 American Physical Society | en_US |
| dc.subject | Quantum channels | en_US |
| dc.subject | Optimization of cost | en_US |
| dc.title | Optimal quantum channels | en_US |
| dc.type | Article | en_US |