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Decoherence and multipartite entanglement.

André R R Carvalho1, Florian Mintert, Andreas Buchleitner

  • 1Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Strasse 38, D-01187 Dresden, Germany.

Physical Review Letters
|December 17, 2004
PubMed
Summary
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We studied how multipartite entanglement dynamics are affected by decoherence. Our findings reveal distinct entanglement decay rates for Greenberger-Horne-Zeilinger and W states across different environments.

Area of Science:

  • Quantum Information Science
  • Quantum Physics

Background:

  • Multipartite entanglement is crucial for quantum information processing.
  • Decoherence poses a significant challenge to maintaining quantum states.

Purpose of the Study:

  • To investigate the dynamics of multipartite entanglement under decoherence.
  • To analyze the decay rates of entanglement for specific quantum states.

Main Methods:

  • Utilized a generalized concurrence measure.
  • Studied entanglement decay in various environmental models.

Main Results:

  • Identified distinct scaling behaviors for entanglement decay rates.
  • Observed differences in decoherence effects on Greenberger-Horne-Zeilinger and W states.

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Conclusions:

  • The decay rate of multipartite entanglement is state-dependent.
  • Environmental interactions significantly influence entanglement dynamics, with varying impacts on different multipartite entangled states.