@article{Hellbach2022Quant-55472.2,
  year={2022},
  doi={10.1103/PhysRevB.105.L241407},
  title={Quantum-correlated photons generated by nonlocal electron transport},
  number={24},
  volume={105},
  issn={2469-9950},
  journal={Physical Review B},
  author={Hellbach, Felicitas and Pauly, Fabian and Belzig, Wolfgang and Rastelli, Gianluca},
  note={Article Number: L241407}
}

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    <dc:contributor>Hellbach, Felicitas</dc:contributor>
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    <dc:contributor>Rastelli, Gianluca</dc:contributor>
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    <dcterms:title>Quantum-correlated photons generated by nonlocal electron transport</dcterms:title>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2022-06-21T11:48:16Z</dc:date>
    <dcterms:abstract xml:lang="eng">Since the realization of high-quality microwave cavities coupled to quantum dots, one can envisage the possibility to investigate the coherent interaction of light and matter in semiconductor quantum devices. Here we study a parallel double quantum dot device operating as single-electron splitter interferometer, with each dot coupled to a local photon cavity. We explore how quantum correlation and entanglement between the two separated cavities are generated by the coherent transport of a single electron passing simultaneously through the two different dots. We calculate the covariance of the cavity occupations by use of a diagrammatic perturbative expansion based on Keldysh Green's functions to the fourth order in the dot-cavity interaction strength, taking into account vertex diagrams. In this way, we demonstrate the creation of entanglement by showing that the classical Cauchy-Schwarz inequality is violated if the energy levels of the two dots are almost degenerate. For large level detunings or a single dot coupled to two cavities, we show that the inequality is not violated.</dcterms:abstract>
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    <dc:creator>Pauly, Fabian</dc:creator>
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    <dc:creator>Rastelli, Gianluca</dc:creator>
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