Coherent Detection of Electron Dephasing

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

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    Abstract

    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
    Volume104
    Issue number17
    DOIs
    Publication statusPublished - Apr 2010

    Keywords

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

    Cite this

    Strambini, E., Chirolli, L., Giovanetti, V., Taddei, F., Fazio, R., & Piazza, V. (2010). Coherent Detection of Electron Dephasing. Physical review letters, 104(17), 170403. https://doi.org/10.1103/PhysRevLett.104.170403