Revealing Genuine Optical-Path Entanglement

Monteiro, F. and Caprara Vivoli, V. and Guerreiro, T. and Martin, A. and Bancal, J. -. D. and Zbinden, H. and Thew, R. T. and Sangouard, N.. (2015) Revealing Genuine Optical-Path Entanglement. Physical review letters, 114 (17). p. 170504.

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Official URL: http://edoc.unibas.ch/40821/

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How can one detect entanglement between multiple optical paths sharing a single photon? We address this question by proposing a scalable protocol, which only uses local measurements where single photon detection is combined with small displacement operations. The resulting entanglement witness does not require postselection, nor assumptions about the photon number in each path. Furthermore, it guarantees that entanglement lies in a subspace with at most one photon per optical path and reveals genuinely multipartite entanglement. We demonstrate its scalability and resistance to loss by performing various experiments with two and three optical paths. We anticipate applications of our results for quantum network certification.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Quantum Physics (Sangouard)
UniBasel Contributors:Sangouard, Nicolas
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:30 Jun 2016 11:01
Deposited On:11 May 2016 13:55

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