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Photonic Bell test with spacelike separation and high detection efficiency

Shalm and colleagues reported a Bell-inequality violation using polarization-entangled photon pairs, rapid setting choices, spacelike separation and efficient superconducting detectors. For a five-pulse aggregation the source table reports a local-realism p-value of 5.9 × 10⁻⁹, or 2.3 × 10⁻⁷ under its stated excess-predictability model.

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What is recorded here?

Shalm and colleagues reported a Bell-inequality violation using polarization-entangled photon pairs, rapid setting choices, spacelike separation and efficient superconducting detectors. For a five-pulse aggregation the source table reports a local-realism p-value of 5.9 × 10⁻⁹, or 2.3 × 10⁻⁷ under its stated excess-predictability model.

Source-linked catalogue note. A detailed explanatory guide has not yet been prepared for this entry.

Scientific scope

The test addresses locality and fair-sampling loopholes together under assumptions about timing, recorded outcomes and measurement-setting independence. No finite experiment removes every possible assumption. Five-pulse and other analyses reuse the same data rather than independent experiments; raw statistical replay and the separate supplementary material were not examined. The five-pulse p-value is printed as 5.8 × 10⁻⁹ in the text and figure but 5.9 × 10⁻⁹ in the abstract and table. The final published paper confirms the same 34-person printed byline as v1 and explicitly marks the second and third authors as equal contributors. Its abstract and table print 5.9 × 10⁻⁹ while its text and figure print 5.8 × 10⁻⁹; this source-internal difference remains uncorrected. The final reported run was selected as the most stable among six configurations. The 2015 journal figure 3 caption says pulses 1–11 are spacelike separated, while both author-preprint v1 and 2016 v2 figure 3 say pulse 1 is not and pulses 2–11 are. The reported five-pulse aggregate uses pulses 4–8, so this textual discrepancy does not concern inclusion of pulse 1 in that aggregate. The independent source of this discrepancy has not been checked.

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People and systems

Lynden K. Shalm; Evan Meyer-Scott; Bradley G. Christensen; Peter Bierhorst; Michael A. Wayne; Martin J. Stevens; Thomas Gerrits; Scott Glancy; Deny R. Hamel; Michael S. Allman; Kevin J. Coakley; Shellee D. Dyer; Carson Hodge; Adriana E. Lita; Varun B. Verma; Camilla Lambrocco; Edward Tortorici; Alan L. Migdall; Yanbao Zhang; Daniel R. Kumor; William H. Farr; Francesco Marsili; Matthew D. Shaw; Jeffrey A. Stern; Carlos Abellán; Waldimar Amaya; Valerio Pruneri; Thomas Jennewein; Morgan W. Mitchell; Paul G. Kwiat; Joshua C. Bienfang; Richard P. Mirin; Emanuel Knill; Sae Woo Nam

These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.

Research locations and affiliations

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English catalogue narrative

Photonic Bell test with spacelike separation and high detection efficiency

Shalm and colleagues reported a Bell-inequality violation using polarization-entangled photon pairs, rapid setting choices, spacelike separation and efficient superconducting detectors. For a five-pulse aggregation the source table reports a local-realism p-value of 5.9 × 10⁻⁹, or 2.3 × 10⁻⁷ under its stated excess-predictability model.

Scientific scope

The test addresses locality and fair-sampling loopholes together under assumptions about timing, recorded outcomes and measurement-setting independence. No finite experiment removes every possible assumption. Five-pulse and other analyses reuse the same data rather than independent experiments; raw statistical replay and the separate supplementary material were not examined. The five-pulse p-value is printed as 5.8 × 10⁻⁹ in the text and figure but 5.9 × 10⁻⁹ in the abstract and table. The final published paper confirms the same 34-person printed byline as v1 and explicitly marks the second and third authors as equal contributors. Its abstract and table print 5.9 × 10⁻⁹ while its text and figure print 5.8 × 10⁻⁹; this source-internal difference remains uncorrected. The final reported run was selected as the most stable among six configurations. The 2015 journal figure 3 caption says pulses 1–11 are spacelike separated, while both author-preprint v1 and 2016 v2 figure 3 say pulse 1 is not and pulses 2–11 are. The reported five-pulse aggregate uses pulses 4–8, so this textual discrepancy does not concern inclusion of pulse 1 in that aggregate. The independent source of this discrepancy has not been checked.

Reading status

This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.

People and systems

Lynden K. Shalm; Evan Meyer-Scott; Bradley G. Christensen; Peter Bierhorst; Michael A. Wayne; Martin J. Stevens; Thomas Gerrits; Scott Glancy; Deny R. Hamel; Michael S. Allman; Kevin J. Coakley; Shellee D. Dyer; Carson Hodge; Adriana E. Lita; Varun B. Verma; Camilla Lambrocco; Edward Tortorici; Alan L. Migdall; Yanbao Zhang; Daniel R. Kumor; William H. Farr; Francesco Marsili; Matthew D. Shaw; Jeffrey A. Stern; Carlos Abellán; Waldimar Amaya; Valerio Pruneri; Thomas Jennewein; Morgan W. Mitchell; Paul G. Kwiat; Joshua C. Bienfang; Richard P. Mirin; Emanuel Knill; Sae Woo Nam

These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.

Original sources