Quantum coherence of electrons field-emitted from a superconductor: Correlations and entanglement

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    Abstract

    The correlations of the electrons field-emitted from a superconductor are fully analyzed, both in space and time. It is proposed that a coincidence experiment would reveal a positive correlation between the electrons emitted in opposite directions. The electrons can be entangled and can even violate Bell's inequality. The crucial role played by Andreev's process is scrutinized, analytical formulas are derived for the correlations, and the physics behind the phenomenon is clarified.

    Original languageEnglish
    Article number104516
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume80
    Issue number10
    DOIs
    Publication statusPublished - 2009 Sep 29

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    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

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