Beating the limits with initial correlations
| dc.date.accessioned | 2018-02-06T12:39:02Z | |
| dc.date.available | 2018-02-06T12:39:02Z | |
| dc.date.issued | 2017-11-28 | |
| dc.description.sponsorship | Gefördert durch den Publikationsfonds der Universität Kassel | |
| dc.identifier.issn | 1367-2630 | |
| dc.identifier.uri | urn:nbn:de:hebis:34-2018020654484 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/2018020654484 | |
| dc.language.iso | eng | |
| dc.relation.doi | doi:10.1088/1367-2630/aa96f8 | |
| dc.rights | Urheberrechtlich geschützt | |
| dc.rights.uri | https://rightsstatements.org/page/InC/1.0/ | |
| dc.subject | quantum control | eng |
| dc.subject | superconducting qubits | eng |
| dc.subject | state preparation | eng |
| dc.subject.ddc | 530 | |
| dc.title | Beating the limits with initial correlations | eng |
| dc.type | Aufsatz | |
| dcterms.abstract | Fast and reliable reset of a qubit is a key prerequisite for any quantum technology. For real world open quantum systems undergoing non-Markovian dynamics, reset implies not only purification, but in particular erasure of initial correlations between qubit and environment. Here, we derive optimal reset protocols using a combination of geometric and numerical control theory. For factorizing initial states, we find a lower limit for the entropy reduction of the qubit as well as a speed limit. The time-optimal solution is determined by the maximum coupling strength. Initial correlations, remarkably, allow for faster reset and smaller errors. Entanglement is not necessary. | eng |
| dcterms.accessRights | open access | |
| dcterms.bibliographicCitation | In: New Journal of Physics. - London : IOP. - 19(2017) 113042 | |
| dcterms.creator | Basilewitsch, Daniel | |
| dcterms.creator | Schmidt, Rebecca | |
| dcterms.creator | Sugny, Dominique | |
| dcterms.creator | Maniscalco, Sabrina | |
| dcterms.creator | Koch, Christiane P. |