Distillation by repeated measurements: Continuous spectrum case

Giuseppe Compagno, Bruno Bellomo, Kazuya Yuasa, Hiromichi Nakazato

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

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
Pages (from-to)060101-1-060101-4
Number of pages4
JournalPHYSICAL REVIEW A
Volume82
Publication statusPublished - 2010

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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