Ramsey interferometry with generalized one-axis twisting echoes

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dc.identifier.uri http://dx.doi.org/10.15488/9960
dc.identifier.uri https://www.repo.uni-hannover.de/handle/123456789/10018
dc.contributor.author Schulte, Marius
dc.contributor.author Martínez-Lahuerta, Victor J.
dc.date.accessioned 2020-08-03T15:49:16Z
dc.date.available 2020-08-03T15:49:16Z
dc.date.issued 2020
dc.identifier.citation Schulte, Marius; Martínez-Lahuerta, Victor J.: Ramsey interferometry with generalized one-axis twisting echoes. In: Quantum 4 (2020), 268. DOI: https://doi.org/10.22331/q-2020-05-15-268
dc.description.abstract We consider a large class of Ramsey interferometry protocols which are enhanced by squeezing and un-squeezing operations before and after a phase signal is imprinted on the collective spin of N particles. We report an analytical optimization for any given particle number and strengths of (un-)squeezing. These results can be applied even when experimentally relevant decoherence processes during the squeezing and un-squeezing interactions are included. Noise between the two interactions is however not considered in this work. This provides a generalized characterization of squeezing echo protocols, recovering a number of known quantum metrological protocols as local sensitivity maxima, thereby proving their optimality. We discover a single new protocol. Its sensitivity enhancement relies on a double inversion of squeezing. In the general class of echo protocols, the newly found over-un-twisting protocol is singled out due to its Heisenberg scaling even at strong collective dephasing. eng
dc.language.iso eng
dc.publisher Wien : Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften
dc.relation.ispartofseries Quantum 4 (2020)
dc.rights CC BY 4.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by/4.0/
dc.subject Ramsey interferometry eng
dc.subject optimization eng
dc.subject squeezing eng
dc.subject un-squeezing eng
dc.subject.ddc 530 | Physik ger
dc.title Ramsey interferometry with generalized one-axis twisting echoes eng
dc.type article
dc.type Text
dc.relation.doi https://doi.org/10.22331/q-2020-05-15-268
dc.bibliographicCitation.volume 4
dc.bibliographicCitation.firstPage 268
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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