Nonlocal polarization interferometer for entanglement detection

Williams, Brian P.; Humble, Travis S.; Grice, Warren P.

doi:10.1103/PhysRevA.90.042121

Nonlocal polarization interferometer for entanglement detection

Journal Article · Thu Oct 30 00:00:00 EDT 2014 · Physical Review A - Atomic, Molecular, and Optical Physics

DOI:https://doi.org/10.1103/PhysRevA.90.042121· OSTI ID:1185636

Williams, Brian P. ^[1]; Humble, Travis S. ^[2]; Grice, Warren P. ^[2]

Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

We report a nonlocal interferometer capable of detecting entanglement and identifying Bell states statistically. This is possible due to the interferometer's unique correlation dependence on the antidiagonal elements of the density matrix, which have distinct bounds for separable states and unique values for the four Bell states. The interferometer consists of two spatially separated balanced Mach-Zehnder or Sagnac interferometers that share a polarization-entangled source. Correlations between these interferometers exhibit nonlocal interference, while single-photon interference is suppressed. This interferometer also allows for a unique version of the Clauser-Horne-Shimony-Holt Bell test where the local reality is the photon polarization. In conclusion, we present the relevant theory and experimental results.

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1185636

Alternate ID(s):: OSTI ID: 1179658

Journal Information:: Physical Review A - Atomic, Molecular, and Optical Physics, Journal Name: Physical Review A - Atomic, Molecular, and Optical Physics Journal Issue: 4 Vol. 90; ISSN 1050-2947

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (2)

Tamper-Indicating Quantum Seal Williams, Brian P.; Britt, Keith A.; Humble, Travis S. Physical Review Applied, Vol. 5, Issue 1 https://doi.org/10.1103/physrevapplied.5.014001	journal	January 2016
A tamper-indicating quantum seal Williams, Brian P.; Britt, Keith A.; Humble, Travis S. arXiv https://doi.org/10.48550/arxiv.1508.05334	text	January 2015

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