Electronic implementations of interaction-free measurements

L. Chirolli, Elia Strambini, V. Giovannetti, F. Taddei, V. Piazza, R. Fazio, F. Beltram, G. Burkard

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    14 Citations (Scopus)


    Three different implementations of interaction-free measurements (IFMs) in solid-state nanodevices are discussed. The first one is based on a series of concatenated Mach-Zehnder interferometers, in analogy to optical-IFM setups. The second one consists of a single interferometer and concatenation is achieved in the time domain making use of a quantized electron emitter. The third implementation consists of an asymmetric Aharonov-Bohm ring. For all three cases we show that the presence of a dephasing source acting on one arm of the interferometer can be detected without degrading the coherence of the measured current. Electronic implementations of IFMs in nanoelectronics may play a fundamental role as very accurate and noninvasive measuring schemes for quantum devices.
    Original languageUndefined
    Pages (from-to)045403
    Number of pages11
    JournalPhysical review B: Condensed matter and materials physics
    Issue number4
    Publication statusPublished - 7 Jul 2010


    • EWI-19583
    • IR-75996
    • METIS-275931

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