Approaching Tsirelson's bound in a photon pair experiment

Hou Shun Poh, Siddarth Joshi, Alessandro Cerè, Adán Cabello, Christian Kurtsiefer

Research output: Contribution to journalArticle (Academic Journal)peer-review

40 Citations (Scopus)


We present an experimental test of the Clauser-Horne-Shimony-Holt Bell inequality on photon pairs in a
maximally entangled state of polarization in which a value S = 2.82759 ± 0.00051 is observed. This value comes close to the Tsirelson bound of |S|≤ 2 Sqrt(2), with S −2 Sqrt(2) =0.00084 ± 0.00051. It also violates
the bound |S| ≤ 2.82537 introduced by Grinbaum by 4.3 standard deviations. This violation allows us to exclude that quantum mechanics is only an effective description of a more fundamental theory.
Original languageEnglish
Article number180408
Number of pages4
JournalPhysical Review Letters
Issue number18
Publication statusPublished - 30 Oct 2015

Structured keywords

  • Photonics and Quantum


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