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Feedback control of coherent spin states using weak nondestructive measurements

hal.structure.identifierInstitut de Ciencies Fotoniques [Castelldefels] [ICFO]
dc.contributor.authorVANDERBRUGGEN, T.
hal.structure.identifierLaboratoire Charles Fabry / Optique atomique
dc.contributor.authorKOHLHAAS, R.
hal.structure.identifierLaboratoire Photonique, Numérique et Nanosciences [LP2N]
dc.contributor.authorBERTOLDI, A.
hal.structure.identifierLaboratoire Photonique, Numérique et Nanosciences [LP2N]
hal.structure.identifierQuantel
dc.contributor.authorCANTIN, E.
hal.structure.identifierLaboratoire national de métrologie et d'essais - Systèmes de Référence Temps-Espace [LNE - SYRTE]
dc.contributor.authorLANDRAGIN, A.
hal.structure.identifierLaboratoire Photonique, Numérique et Nanosciences [LP2N]
dc.contributor.authorBOUYER, P.
dc.date.accessioned2023-05-12T10:20:05Z
dc.date.available2023-05-12T10:20:05Z
dc.date.created2014-04-04
dc.date.issued2014-06
dc.identifier.issn1050-2947
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/181060
dc.description.abstractEnWe consider the decoherence of a pseudo-spin ensemble under collective random rotations, and study, both theoretically and experimentally, how a nondestructive measurement combined with real-time feedback correction can protect the state against such a decoherence process. We theoretically characterize the feedback efficiency with different parameters --- coherence, entropy, fidelity --- and show that a maximum efficiency is reached in the weak measurement regime, when the projection of the state induced by the measurement is negligible. This article presents in detail the experimental results published in [Phys. Rev. Lett. \textbf{110}, 210503 (2013)], where the feedback scheme stabilizes coherent spin states of trapped ultra-cold atoms, and nondestructively probed with a dispersive optical detection. In addition, we study the influence of several parameters, such as atom number and rotation angle, on the performance of the method. We analyze the various decoherence sources limiting the feedback efficiency and propose how to mitigate their effect. The results demonstrate the potential of the method for the real-time coherent control of atom interferometers.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.title.enFeedback control of coherent spin states using weak nondestructive measurements
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevA.89.063619
dc.subject.halPhysique [physics]/Physique [physics]/Physique Atomique [physics.atom-ph]
dc.subject.halPhysique [physics]/Physique Quantique [quant-ph]
dc.subject.halPhysique [physics]/Physique [physics]/Optique [physics.optics]
dc.subject.halSciences de l'ingénieur [physics]/Optique / photonique
dc.identifier.arxiv1405.4749
bordeaux.journalPhysical Review A : Atomic, molecular, and optical physics [1990-2015]
bordeaux.page063619
bordeaux.volume89
bordeaux.hal.laboratoriesLaboratoire Photonique, Numérique et Nanosciences (LP2N) - UMR 5298*
bordeaux.issue6
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionCNRS
bordeaux.peerReviewedoui
hal.identifierhal-00974536
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00974536v1
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