Coherent Detection of Electron Dephasing

Elia Strambini, L. Chirolli, V. Giovanetti, F. Taddei, R. Fazio, V. Piazza

    Research output: Contribution to journalArticleAcademicpeer-review

    9 Citations (Scopus)
    107 Downloads (Pure)


    We show that an Aharonov-Bohm ring with asymmetric electron injection can act as a coherent detector of electron dephasing. The presence of a dephasing source in one of the two arms of a moderately-tohighly asymmetric ring changes the response of the system from total reflection to complete transmission while preserving the coherence of the electrons propagating from the ring, even for strong dephasing. We interpret this phenomenon as an implementation of an interaction-free measurement.
    Original languageUndefined
    Pages (from-to)170403
    Number of pages4
    JournalPhysical review letters
    Issue number17
    Publication statusPublished - Apr 2010


    • EWI-19582
    • IR-75995
    • METIS-275930

    Cite this