Sequential measurement of displacement and conduction currents in electronic devices

Guillermo Albareda, Fabio Lorenzo Traversa, Abdelilah Benali

    Research output: Contribution to journalArticleResearchpeer-review

    2 Citations (Scopus)

    Abstract

    © 2016 World Scientific Publishing Company. The extension of the Ramo-Schockley-Pellegrini theorem for quantum systems allows to define a positive-operator valued measure (POVM) for the total conduction plus displacement electrical current. The resulting current operator is characterized by two parameters, viz. the width of the associated Gaussian functions and the lapse of time between consecutive measurements. For large Gaussian dispersions and small time intervals, the operator obeys to a continuous weak-measurement scheme. Contrarily, in the limit of very narrow Gaussian widths and a single-shot measurement, the operator corresponds to a standard von Neumann (projective) measurement. We have implemented the resulting measurement protocol into a quantum electron transport simulator. Numerical results for a resonant tunneling diode show the great sensibility of current-voltage characteristics to different parameter configurations of the total current operator.
    Original languageEnglish
    Article number1640004
    JournalFluctuation and Noise Letters
    Volume15
    Issue number3
    DOIs
    Publication statusPublished - 1 Sep 2016

    Keywords

    • displacement current
    • electronic devices
    • Quantum mechanics
    • resonant tunneling diode
    • sequential measurements
    • weak measurements

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