期刊
PHYSICAL REVIEW A
卷 86, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.86.032332
关键词
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资金
- Brazilian agencies Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro (FAPEMIG)
- Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro (FAPERJ)
- Instituto Nacional de Ciencia e Tecnologia - Informacao Quantica
- European Commission [255914]
We experimentally detect entanglement in modular position and momentum variables of photon pairs which have passed through D-slit apertures. We first employ an entanglement criteria recently proposed in [Phys. Rev. Lett. 106, 210501 (2011)], using variances of the modular variables. We then propose an entanglement witness for modular variables based on the Shannon entropy and test it experimentally. Finally, we derive criteria for Einstein-Podolsky-Rosen-steering correlations using variances and entropy functions. In both cases, the entropic criteria are more successful at identifying quantum correlations in our data.
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