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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Classical synchronization indicates persistent entanglement in isolated quantum systems.

Dirk Witthaut1,2,3, Sandro Wimberger4,5, Raffaella Burioni4,5

  • 1Forschungszentrum Jülich, Institute for Energy and Climate Research (IEK-STE), 52428 Jülich, Germany.

Nature Communications
|April 13, 2017
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Summary
This summary is machine-generated.

Synchronization in isolated quantum systems is an intrinsic feature, directly linked to quantum coherence and entanglement. This finding bridges classical and quantum cooperative phenomena, observable in experiments with ultracold atoms.

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Area of Science:

  • Quantum physics
  • Statistical mechanics
  • Condensed matter theory

Background:

  • Synchronization is a key collective phenomenon in classical systems, indicating coordinated states.
  • Entanglement is a fundamental quantum phenomenon implying correlated quantum states.
  • Understanding collective behavior in quantum many-body systems is crucial.

Purpose of the Study:

  • To establish a direct link between synchronization and entanglement in isolated quantum many-body systems.
  • To demonstrate that synchronization is an intrinsic property of these systems.
  • To explore the emergence of quantum coherence and entanglement alongside synchronization.

Main Methods:

  • Theoretical analysis of isolated quantum many-body systems.
  • Investigation of phase transitions within these systems.
  • Focus on systems exhibiting collective behavior.

Main Results:

  • Synchronization emerges as an intrinsic feature in a class of isolated quantum many-body systems.
  • Quantum coherence and entanglement arise persistently through the same transition as synchronization.
  • A direct link is demonstrated between classical synchronization and quantum cooperative phenomena.

Conclusions:

  • Synchronization is not limited to classical systems but is an intrinsic quantum phenomenon.
  • The study provides a unified perspective on classical and quantum collective behaviors.
  • Findings have implications for understanding strongly correlated quantum systems and experimental observations with ultracold atoms.