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The DOI matches its Crossref record; 4 of the 4 references it cites were found in a registry or an index.

Beating the Standard Quantum Limit with Four-Entangled Photons

Nagata, Tomohisa, Okamoto, Ryo, O'Brien, Jeremy L., Sasaki, Keiji, Takeuchi, Shigeki·2007·Science
DOI 10.1126/science.1138007
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Abstract

Precision measurements are important across all fields of science. In particular, optical phase measurements can be used to measure distance, position, displacement, acceleration, and optical path length. Quantum entanglement enables higher precision than would otherwise be possible. We demonstrated an optical phase measurement with an entangled four-photon interference visibility greater than the threshold to beat the standard quantum limit—the limit attainable without entanglement. These results open the way for new high-precision measurement applications.

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Crossref · 10.1126/science.1138007

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4 of 4 references verified0 citation errors · 0 not checkable

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  • Higher Bell state discrimination success rates can be achieved with nonlinear optics, entanglement in auxiliary modes, or feed-forward techniques.

    “Higher success rates can be achieved with nonlinear optics [73], entanglement in auxiliary modes [74,75], or feed-forward techniques [76].”

    From Two-photon interference: the Hong–Ou–Mandel effect (2021) · cites this paper as [73]

    The paper’s discussion of the four-photon interferometer and its results (main text, Fig. 3; page not provided) concerns phase sensitivity, not Bell-state discrimination. Its discussion of distinguishing two four-photon input states (main text, Fig. 2, and Additional information; pages not provided) does not address whether auxiliary-mode entanglement improves Bell-state discrimination success rates. Searches for Bell-state discrimination, auxiliary modes, nonlinear optics, and feed-forward found no passage supporting the attributed point. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

  • To the authors' knowledge, this constitutes the highest precision per-particle reported so far.

    “To our knowledge, this constitutes the highest precision per-particle reported so far47918.”

    From Photonic polarization gears for ultra-sensitive angular measurements (2013) · cites this paper as [4]

  • Experimental preparation of NOON states with large N is extremely challenging; only N=3, 4 and 5 photonic NOON states have been reported.

    “However, the experimental preparation of NOON states with large N is extremely challenging, and to date only N=3, 4 and 5 photonic NOON states have been reported2345.”

    From Photonic polarization gears for ultra-sensitive angular measurements (2013) · cites this paper as [4]

  • The authors designed an inherently stable architecture using polarization encoding, partially polarizing beam splitters, and a displaced-Sagnac architecture to implement the KLM CNOT gate.

    “We designed the inherently stable architecture shown in Fig. 2d to implement the KLM CNOT gate of Fig. 2b, using polarization to encode photonic qubits.”

    From Realization of a Knill-Laflamme-Milburn controlled-NOT photonic quantum circuit combining effective optical nonlinearities (2011) · cites this paper as [6]

  • The device will be useful for conventional and cluster state approaches to quantum computing, as well as quantum communication and optical quantum metrology.

    “Our device will be useful for conventional and cluster state approaches to quantum computing [29], as well as quantum communication [1] and optical quantum metrology [6].”

    From Realization of a Knill-Laflamme-Milburn controlled-NOT photonic quantum circuit combining effective optical nonlinearities (2011) · cites this paper as [6]

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Citations

Cites

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Research works printed but not linked: 27

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Metadata

Authors
Nagata, T., Okamoto, R., O'Brien, J. L., Sasaki, K., & Takeuchi, S.
Venue
Science
Publisher
American Association for the Advancement of Science (AAAS)
Published
2007-05-04
Volume
316
Issue
5825
Pages
726-729
ISSN
  • 0036-8075
  • 1095-9203
DOI
10.1126/science.1138007
Cited by
735
References
4
Language
en

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