| DOI | Trouver le DOI : https://doi.org/10.1021/acsphotonics.8b01496 |
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| Auteur | Rechercher : Fognini, A.Identifiant ORCID : https://orcid.org/0000-0002-2895-1110; Rechercher : Ahmadi, A.Identifiant ORCID : https://orcid.org/0000-0002-8115-5324; Rechercher : Zeeshan, M.; Rechercher : Fokkens, J. T.; Rechercher : Gibson, S. J.; Rechercher : Sherlekar, N.; Rechercher : Daley, S. J.; Rechercher : Dalacu, D.1; Rechercher : Poole, P. J.1; Rechercher : Jöns, K. D.Identifiant ORCID : https://orcid.org/0000-0002-5814-7510; Rechercher : Zwiller, V.; Rechercher : Reimer, M. E. |
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| Affiliation | - Conseil national de recherches du Canada. Électronique et photonique avancées
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| Format | Texte, Article |
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| Sujet | entanglement; fine-structure splitting; quantum dot; single photons |
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| Résumé | Generation of photon pairs from quantum dots with near-unity entanglement fidelity has been a long-standing scientific challenge. It is generally thought that the nuclear spins limit the entanglement fidelity through spin flip dephasing processes. However, this assumption lacks experimental support. Here, we show two-photon entanglement with negligible dephasing from an indium rich single quantum dot comprising a nuclear spin of 9/2 when excited quasi-resonantly. This finding is based on a significantly close match between our entanglement measurements and our model that assumes no dephasing and takes into account the detection system’s timing jitter and dark counts. We suggest that neglecting the detection system is responsible for the degradation of the measured entanglement fidelity in the past and not the nuclear spins. Therefore, the key to unity entanglement from quantum dots comprises a resonant excitation scheme and a detection system with ultralow timing jitter and dark counts. |
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| Date de publication | 2019-05-30 |
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| Maison d’édition | American Chemical Society |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | c9592153-f227-4927-a266-e2dbe5fa4277 |
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| Enregistrement créé | 2021-02-22 |
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| Enregistrement modifié | 2021-02-22 |
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