Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 19: Quantum Networks, Repeaters, and QKD II (joint session Q/QI)
Q 19.7: Vortrag
Dienstag, 11. März 2025, 12:30–12:45, AP-HS
Optical single-shot readout of spin qubits in silicon — •Jakob Pforr, Andreas Gritsch, Alexander Ulanowski, Stephan Rinner, Johannes Früh, Florian Burger, Jonas Schmitt, Kilian Sandholzer, Adrian Holzäpfel, and Andreas Reiserer — Technical University of Munich, TUM School of Natural Sciences and Munich Center for Quantum Science and Technology (MCQST), 85748 Garching, Germany
Individual erbium emitters are a promising hardware platform for quantum networks as their coherent optical transitions exhibit low loss in optical fibers. Using silicon as a host crystal for erbium allows for scalable fabrication using established processes of the semiconductor industry [1]. To address single dopants, we integrate them into nanophotonic resonators with high Q∼ 105 and small V ∼ λ3, thus reducing their lifetime by more than a factor of 60 via the Purcell effect [2]. We then optically initialize the spin, implement high-fidelity optical single-shot readout and realize coherent control of the spin with microwaves [3]. These advances constitute a major step towards quantum information processing with Er:Si. We will further present our measurements of the coherence of photons emitted by individual dopants, which paves the way towards the generation of remote entanglement.
[1] Rinner et. al., Nanophotonics 12(17): 3455-3462, 2023.
[2] Gritsch et. al., Optica 10: 783-789, 2023.
[3] Gritsch et. al., arXiv: 2405.05351, 2024.
Keywords: Rare-earth emitters; Purcell enhancement; Spin qubits; Resonators; Foundry