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Nonlocality from Local Contextuality.

Bi-Heng Liu1,2, Xiao-Min Hu1,2, Jiang-Shan Chen1,2

  • 1Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230026, People's Republic of China.

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Quantum nonlocality can arise from single-particle contextuality using two-particle correlations. This research connects contextuality and nonlocality, key resources for quantum computation and secure communication.

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Area of Science:

  • Quantum Information Science
  • Quantum Foundations

Background:

  • Contextuality and nonlocality are fundamental quantum resources.
  • Contextuality is crucial for quantum computation, while nonlocality is vital for secure communication.

Purpose of the Study:

  • To experimentally demonstrate that nonlocality can be generated from single-particle contextuality.
  • To establish a link between contextuality and nonlocality.
  • To show the potential for simultaneous use of quantum systems in computation and communication.

Main Methods:

  • Utilizing two-particle correlations that do not individually violate Bell inequalities.
  • Experimentally producing nonlocality from single-particle contextuality.

Main Results:

  • Successful experimental generation of nonlocality from single-particle contextuality.
  • Demonstration that nonlocality can emerge from a simpler, distinct phenomenon.
  • Established a connection between contextuality and nonlocality.

Conclusions:

  • Quantum systems can be engineered to harness both contextuality and nonlocality.
  • This work provides a proof of principle for using quantum systems for both quantum computation and secure communication simultaneously.