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Quantum nonlocality. Detecting nonlocality in many-body quantum states.

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Area of Science:

  • Quantum physics
  • Quantum many-body systems

Background:

  • Entanglement properties are key to understanding quantum many-body systems.
  • Quantum nonlocality's role remains less understood due to experimental challenges with multipartite Bell inequalities.

Purpose of the Study:

  • To construct novel multipartite Bell inequalities accessible for experimental verification.
  • To demonstrate how these inequalities reveal nonlocality in many-body systems relevant to nuclear and atomic physics.

Main Methods:

  • Developed multipartite Bell inequalities focusing exclusively on two-body correlations.
  • Proposed utilizing total spin components for experimental testing.

Main Results:

  • The constructed inequalities are violated for any number of parties.
  • These inequalities effectively reveal nonlocality in relevant many-body systems.

Conclusions:

  • The new inequalities provide a feasible pathway for experimentally detecting many-body nonlocality.
  • This research opens avenues for experiments using systems like atomic ensembles.