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Entanglement screening by nonlinear resonances.

Ignacio García-Mata1, André R R Carvalho, Florian Mintert

  • 1Laboratoire de Physique Théorique, UMR 5152 du CNRS, Université Paul Sabatier, 31062 Toulouse Cedex 4, France. garcia@irsamc.ups-tlse.fr

Physical Review Letters
|May 16, 2007
PubMed
Summary
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Nonlinear resonances enable the creation of strongly entangled multipartite quantum states. Their entanglement robustness grows with particle number, especially with noise aiding the quantum-classical transition.

Area of Science:

  • Quantum mechanics
  • Nonlinear dynamics
  • Statistical physics

Background:

  • Understanding multipartite entanglement is crucial for quantum information science.
  • Classically mixed phase spaces present unique challenges for quantum state definition.
  • The role of noise in quantum-classical transitions requires further investigation.

Purpose of the Study:

  • To define generic, strongly entangled multipartite quantum states using nonlinear resonances.
  • To investigate the robustness of multipartite entanglement in relation to particle number and noise.
  • To explore the semiclassical limit in the context of quantum-classical transitions.

Main Methods:

  • Utilizing nonlinear resonances within a classically mixed phase space.
  • Analyzing the behavior of multipartite quantum states with varying particle numbers.

Related Experiment Videos

  • Characterizing the impact of diffusive noise on entanglement robustness.

    • Main Results:

    • Demonstrated the definition of generic, strongly entangled multipartite quantum states via nonlinear resonances.
    • Showed that multipartite entanglement robustness increases with particle number.
    • Identified specific classes of diffusive noise that enhance entanglement in the semiclassical limit.

    Conclusions:

    • Nonlinear resonances provide a powerful tool for generating robust multipartite entangled states.
    • The findings highlight a pathway to enhance quantum entanglement in larger quantum systems.
    • The study offers insights into controlling quantum states in the presence of noise and classical dynamics.