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Article: Entanglement detection and quantum metrology by Raman photon diffraction imaging

TitleEntanglement detection and quantum metrology by Raman photon diffraction imaging
Authors
Issue Date2013
PublisherAmerican Physical Society.
Citation
Physical Review A (Atomic, Molecular and Optical Physics), 2013, v. 87, p. 042303 How to Cite?
AbstractWe show that far-field diffraction images of spontaneously scattered Raman photons can be used for detection of spin entanglement and for metrology of field gradients in cold atomic ensembles. For many-body states with small or maximum uncertainty in the spin-excitation number, entanglement is simply witnessed by the presence of a sharp diffraction peak or dip. The gradient vector of external fields is measured by the displacement of a diffraction peak due to inhomogeneous spin precession, which suggests a possibility for precision measurements beyond the standard quantum limit without entanglement. Monitoring of the temporal decay of the diffraction peak can also realize a nondemolition probe of the temperature and collisional interactions in trapped cold atomic gases. The approach can be readily generalized to cold molecules, trapped ions, and solid-state spin ensembles. © 2013 American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/186156
ISSN
2014 Impact Factor: 2.808
2015 SCImago Journal Rankings: 1.418
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYu, Hen_US
dc.contributor.authorYao, Wen_US
dc.date.accessioned2013-08-20T11:57:22Z-
dc.date.available2013-08-20T11:57:22Z-
dc.date.issued2013en_US
dc.identifier.citationPhysical Review A (Atomic, Molecular and Optical Physics), 2013, v. 87, p. 042303en_US
dc.identifier.issn1050-2947-
dc.identifier.urihttp://hdl.handle.net/10722/186156-
dc.description.abstractWe show that far-field diffraction images of spontaneously scattered Raman photons can be used for detection of spin entanglement and for metrology of field gradients in cold atomic ensembles. For many-body states with small or maximum uncertainty in the spin-excitation number, entanglement is simply witnessed by the presence of a sharp diffraction peak or dip. The gradient vector of external fields is measured by the displacement of a diffraction peak due to inhomogeneous spin precession, which suggests a possibility for precision measurements beyond the standard quantum limit without entanglement. Monitoring of the temporal decay of the diffraction peak can also realize a nondemolition probe of the temperature and collisional interactions in trapped cold atomic gases. The approach can be readily generalized to cold molecules, trapped ions, and solid-state spin ensembles. © 2013 American Physical Society.-
dc.languageengen_US
dc.publisherAmerican Physical Society.en_US
dc.relation.ispartofPhysical Review A (Atomic, Molecular and Optical Physics)en_US
dc.rightsPhysical Review A (Atomic, Molecular and Optical Physics). Copyright © American Physical Society.en_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleEntanglement detection and quantum metrology by Raman photon diffraction imagingen_US
dc.typeArticleen_US
dc.identifier.emailYu, H: yuhongyi@hku.hken_US
dc.identifier.emailYao, W: wangyao@hku.hken_US
dc.identifier.authorityYao, W=rp00827en_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevA.87.042303-
dc.identifier.scopuseid_2-s2.0-84876134316-
dc.identifier.hkuros217827en_US
dc.identifier.volume87en_US
dc.identifier.spage042303en_US
dc.identifier.epage042303en_US
dc.identifier.isiWOS:000316946700005-

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