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Related Experiment Videos

Distillability, bell inequalities, and multiparticle bound entanglement.

A Acín1

  • 1Departament d'Estructura i Constituents de la Matèria, Universitat de Barcelona, Diagonal 647, E-08028 Barcelona, Spain. acin@ecm.ub.es

Physical Review Letters
|January 22, 2002
PubMed
Summary

Quantum states violating Bell inequalities can be distilled into pure-state entanglement. This research connects Bell inequality violation with bipartite distillable entanglement properties.

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Area of Science:

  • Quantum Information Science
  • Quantum Entanglement
  • Quantum Many-Body Systems

Background:

  • Bell inequalities are crucial for detecting quantum entanglement.
  • Bound entangled states are a resource that cannot be distilled into pure entanglement.
  • Dür previously identified multiparticle bound entangled states violating Bell inequalities.

Purpose of the Study:

  • To investigate the relationship between Bell inequality violation and entanglement distillability.
  • To explore whether states violating Bell inequalities are distillable.

Main Methods:

  • Analysis of quantum states that violate a specific Bell inequality.
  • Investigating entanglement distillation protocols for these states.

Main Results:

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  • All quantum states violating the studied Bell inequality can be distilled.
  • A specific partitioning of parties allows for pure-state entanglement distillation.
  • Demonstrated a direct link between Bell inequality violation and bipartite distillable entanglement.

Conclusions:

  • Violation of this Bell inequality implies the presence of distillable entanglement.
  • This finding establishes a concrete connection between Bell inequalities and bipartite distillability.