Deterministic spin-photon interfaces

SPICE Workshop on Quantum Spinoptics, June 13th - 15th 2023

Peter Lodahl

Semiconductor quantum dots embedded in photonic nanostructures offer a highly efficient and coherent deterministic photon-emitter interface [1,2]. It constitutes an on-demand single-photon source for quantum-information applications and allows the realization of deterministic spin-photon interfaces. We discuss the generation of multi-photon entanglement sources by realizing coherent optical control on a single spin embedded in a quantum dot [3]. We discuss the different imperfections of the system [4] and consequently a road map for how to scale up the deterministic entanglement sources [5]. Finally, we discuss potential applications of this novel hardware one-way quantum repeaters [6], and photonic quantum computing [5].

[1] Lodahl et al., Rev. Mod. Phys. 87, 347 (2015)
[2] Lodahl, Ludwig and Warburton, Phys. Today 75, 3-44 (2022)
[3] Appel et al., Phys. Rev. Lett. 128, 233602 (2022)
[4] Tiurev et al., Phys. Rev. A L030601 (2022)
[5] Uppu et al., Nature Nano. 16, 1308 (2021)
[6] Borregaard et al., Phys. Rev. X 10, 021071 (2020)