Controlling the entanglement among three atoms by quantum-jump-based feedback

Yu Chen, Jian Zou*, Jun Gang Li, Bin Shao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We consider a model consisting of three two-level atoms in a heavily damped cavity. We show that the quantum-jump-based feedback can be used to generate a steady entangled state of three atoms against decoherence. When the feedback acts on just one of the atoms, it can protect a maximally entangled state of other two atoms. When the feedback acts on three atoms, by choosing appropriate parameters we can obtain a decoherence-free subspace spanned by two vectors, and by using quantum trajectory Monte Carlo wave function method we find that the maximally entangled state of three atoms in this decoherence-free subspace can be obtained for some specific initial conditions.

Original languageEnglish
Pages (from-to)8365-8370
Number of pages6
JournalWuli Xuebao/Acta Physica Sinica
Volume59
Issue number12
Publication statusPublished - Dec 2010

Keywords

  • Entanglement
  • Quantum feedback
  • Quantum trajectory

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