A report is presented of observed violation of the Clauser-Horne-Shimony-Holt (CHSH) inequality, a particular form of Bell's inequality, in polarisation-entangled photon pairs in the 1550 nm band. Accidental coincidences were included as detected in the S value evaluation of the CHSH inequality. A 10.5 km fibre was used as a quantum channel.
Inspec keywords: light polarisation; Bell theorem; quantum entanglement
Other keywords:
Subjects: Optical polarization; Foundations, theory of quantum measurement, miscellaneous quantum theories; Quantum optics
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