Scientific Results

Bell experiments with random destination sources

Year: 2011

Authors: Sciarrino F., Vallone G., Cabello A., Mataloni P.

Autors Affiliation: Dipartimento di Fisica “La Sapienza,” Universita di Roma, Roma I-00185, Italy; `
Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche (INO-CNR), Largo E. Fermi 6, I-50125 Florence, Italy;
Centro Studi e Ricerche “Enrico Fermi,” Via Panisperna 89/A, Compendio del Viminale, Roma I-00184, Italy;
Departamento de Fısica Aplicada II, Universidad de Sevilla, E-41012 Sevilla, Spain

Abstract: It is generally assumed that sources randomly sending two particles to one or two different observers, random destination sources (RDSs), cannot be used for genuine quantum nonlocality tests because of the postselection loophole. We demonstrate that Bell experiments not affected by the postselection loophole may be performed with (i) an RDS and local postselection using perfect detectors, (ii) an RDS, local postselection, and fair sampling assumption with any detection efficiency, and (iii) an RDS and a threshold detection efficiency required to avoid the detection loophole. These results allow the adoption of RDS setups which are simpler and more efficient for long-distance free-space Bell tests, and extend the range of physical systems which can be used for loophole-free Bell tests.

Journal/Review: PHYSICAL REVIEW A

Volume: 83 (3)      Pages from: 032112  to: 032112

More Information: This work was supported by FIRB Futuro in Ricerca-HYTEQ. A.C. acknowledges support from the Spanish MICINN Project No. FIS2008-05596.
DOI: 10.1103/PhysRevA.83.032112

Citations: 8
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English