Artículos (Física Aplicada II)

URI permanente para esta colecciónhttps://hdl.handle.net/11441/10854

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Examinando Artículos (Física Aplicada II) por Autor "Alarcón Cuevas, Álvaro"

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    Experimental post-selection loophole-free time-bin and energy-time nonlocality with integrated photonics
    (Optica Publishing Group, 2024-04-20) Santagiustina, Francesco B.L.; Agnesi, Costantino; Alarcón Cuevas, Álvaro; Cabello Quintero, Adán; Xavier, Guilherme B.; Villoresi, Paolo; Vallone, Giuseppe; Universidad de Sevilla. Departamento de Física Aplicada II; Linköpings Universitet; Ministerio de Ciencia, Innovación y Universidades (MICINN). España; Agencia Estatal de Investigación. España; Ministero dell’Istruzione, dell’Università e della Ricerca; Wallenberg Center for Quantum Technology
    Time-bin (TB) and energy-time (ET) entanglements are crucial resources for long-distance quantum information processing. However, their standard implementations suffer from the so-called post-selection loophole that allows for classical simulation and thus prevents quantum advantage. The post-selection loophole has been addressed in proof-of-principle experiments. An open problem though is to close it in real-life applications based on integrated technologies. This is especially important since, so far, all integrated sources of TB and ET entanglements suffer from the post-selection loophole. Here, we report post-selection loophole-free certification of TB or ET entanglement in integrated technologies, by implementing in a silicon nitride chip the “hug” scheme [Phys. Rev. Lett. 102, 040401 (2009) [CrossRef] ] and certifying genuine TB entanglement through the violation of a Bell inequality.