Experimentally faking the violation of Bell's inequalities

  • Gerhardt I
  • Liu Q
  • Lamas-Linares A
 et al. 
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Abstract

Entanglement witnesses such as Bell inequalities are frequently used to prove the non-classicality of a light source and its suitability for further tasks. By demonstrating Bell inequality violations using classical light in common experimental arrangements, we highlight why strict locality and efficiency conditions are not optional, particularly in security-related scenarios.

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Authors

  • Ilja Gerhardt

  • Qin Liu

  • Antía Lamas-Linares

  • Johannes Skaar

  • Valerio Scarani

  • Vadim Makarov

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