Distillation by repeated measurements: Continuous spectrum case

Bruno Bellomo*, Giuseppe Compagno, Hiromichi Nakazato, Kazuya Yuasa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Repeated measurements on one part of a bipartite system strongly affect the other part that is not measured, the dynamics of which is regulated by an effective contracted evolution operator. When the spectrum of this operator is discrete, the nonmeasured system is driven into a pure state, irrespective of the initial state, provided that the spectrum satisfies certain conditions. We show here that, even in the case of continuous spectrum, an effective distillation can occur under rather general conditions. We confirm it by applying our formalism to a simple model.

Original languageEnglish
Article number060101
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number6
Publication statusPublished - 2010 Dec 30

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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