{"abstract":[{"text":"<jats:title>Abstract</jats:title><jats:p>The biexciton‐exciton emission cascade commonly used in quantum‐dot systems to generate polarization entanglement yields photons with intrinsically limited indistinguishability. In the present work, it focuses on the generation of pairs of photons with high degrees of polarization entanglement and simultaneously high indistinguishability. It achieves this goal by selectively reducing the biexciton lifetime with an optical resonator. It demonstrates that a suitably tailored circular Bragg reflector fulfills the requirements of sufficient selective Purcell enhancement of biexciton emission paired with spectrally broad photon extraction and twofold degenerate optical modes. The in‐depth theoretical study combines (i) the optimization of realistic photonic structures solving Maxwell's equations from which model parameters are extracted as input for (ii) microscopic simulations of quantum‐dot cavity excitation dynamics with full access to photon properties. It reports non‐trivial dependencies on system parameters and use the predictive power of the combined theoretical approach to determine the optimal range of Purcell enhancement that maximizes indistinguishability and entanglement to near unity values, here specifically for the telecom C‐band at 1550 nm.</jats:p>","lang":"eng"}],"publication_status":"published","publication_identifier":{"issn":["2511-9044","2511-9044"]},"project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"_id":"55","name":"TRR 142 - Project Area B"},{"_id":"56","name":"TRR 142 - Project Area C"},{"_id":"167","name":"TRR 142; TP B06: Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems"},{"name":"TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch bei Telekom Wellenlängen","_id":"173"},{"_id":"266","name":"PhoQC: Photonisches Quantencomputing"}],"date_updated":"2025-09-12T11:16:12Z","intvolume":"         7","title":"On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs","publisher":"Wiley","user_id":"16199","article_number":"2300142","language":[{"iso":"eng"}],"doi":"10.1002/qute.202300142","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"642"},{"_id":"61"},{"_id":"230"},{"_id":"35"},{"_id":"34"},{"_id":"429"},{"_id":"27"},{"_id":"623"}],"author":[{"first_name":"David","last_name":"Bauch","full_name":"Bauch, David"},{"full_name":"Siebert, Dustin","last_name":"Siebert","first_name":"Dustin"},{"id":"85353","first_name":"Klaus D.","last_name":"Jöns","full_name":"Jöns, Klaus D."},{"full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","first_name":"Jens","id":"158"},{"id":"27271","first_name":"Stefan","last_name":"Schumacher","orcid":"0000-0003-4042-4951","full_name":"Schumacher, Stefan"}],"status":"public","type":"journal_article","volume":7,"date_created":"2025-09-12T11:11:56Z","year":"2023","_id":"61252","citation":{"ama":"Bauch D, Siebert D, Jöns KD, Förstner J, Schumacher S. On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. <i>Advanced Quantum Technologies</i>. 2023;7(1). doi:<a href=\"https://doi.org/10.1002/qute.202300142\">10.1002/qute.202300142</a>","bibtex":"@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs}, volume={7}, DOI={<a href=\"https://doi.org/10.1002/qute.202300142\">10.1002/qute.202300142</a>}, number={12300142}, journal={Advanced Quantum Technologies}, publisher={Wiley}, author={Bauch, David and Siebert, Dustin and Jöns, Klaus D. and Förstner, Jens and Schumacher, Stefan}, year={2023} }","mla":"Bauch, David, et al. “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.” <i>Advanced Quantum Technologies</i>, vol. 7, no. 1, 2300142, Wiley, 2023, doi:<a href=\"https://doi.org/10.1002/qute.202300142\">10.1002/qute.202300142</a>.","ieee":"D. Bauch, D. Siebert, K. D. Jöns, J. Förstner, and S. Schumacher, “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs,” <i>Advanced Quantum Technologies</i>, vol. 7, no. 1, Art. no. 2300142, 2023, doi: <a href=\"https://doi.org/10.1002/qute.202300142\">10.1002/qute.202300142</a>.","apa":"Bauch, D., Siebert, D., Jöns, K. D., Förstner, J., &#38; Schumacher, S. (2023). On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. <i>Advanced Quantum Technologies</i>, <i>7</i>(1), Article 2300142. <a href=\"https://doi.org/10.1002/qute.202300142\">https://doi.org/10.1002/qute.202300142</a>","chicago":"Bauch, David, Dustin Siebert, Klaus D. Jöns, Jens Förstner, and Stefan Schumacher. “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.” <i>Advanced Quantum Technologies</i> 7, no. 1 (2023). <a href=\"https://doi.org/10.1002/qute.202300142\">https://doi.org/10.1002/qute.202300142</a>.","short":"D. Bauch, D. Siebert, K.D. Jöns, J. Förstner, S. Schumacher, Advanced Quantum Technologies 7 (2023)."},"publication":"Advanced Quantum Technologies","issue":"1"}