Control of decoherence via quantum Zeno subspaces

Paolo Facchi*, Hiromichi Nakazato, Saverio Pascazio, Shuichi Tasaki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We discuss three control strategies, whose objective is to counter the effects of decoherence: the first strategy hinges upon the quantum Zeno effect, the second makes use of frequent unitary interruptions ("bang-bang" pulses), and the third of a strong, continuous coupling. Decoherence can be suppressed only if the frequency τ-1 of the measurements/pulses is large enough or if the coupling K is sufficiently strong. Otherwise, if τ-1 or K are large, but not sufficiently large, all these control procedures accelerate decoherence.

Original languageEnglish
Pages (from-to)1408-1420
Number of pages13
JournalInternational Journal of Modern Physics B
Issue number11-13
Publication statusPublished - 2006 May 20


  • Control
  • Decoherence
  • Dissipation
  • Quantum Zeno effect

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics


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