Generating robust entanglement via quantum feedback

Kensuke Gallock Yoshimura, Naoki Yamamoto

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Generating entangled states is one of the most important tasks in quantum information technology. However, in reality any entanglement generator must contain some characteristic uncertainty, and as a result the produced entangled state becomes an undesirable mixed state. This paper develops a coherent feedback control scheme that suppresses the characteristic uncertainty of a typical entanglement generator (the non-degenerate optical parametric oscillator) for producing robust Gaussian entangled states. In particular, we examine a two-mode squeezed state and Gaussian four-mode cluster states to demonstrate the effectiveness of the proposed control method.

Original languageEnglish
Article number055501
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number5
Publication statusPublished - 2019 Feb 8


  • Cluster states
  • Entangled states
  • Non-degenerate optical parametric oscillator
  • Quantum control
  • Quantum feedback

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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