SAMOP 2023 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 33: Quantum Networks II (joint session QI/Q)
QI 33.7: Vortrag
Donnerstag, 9. März 2023, 16:00–16:15, F428
High fidelity single-shot readout of telecom emitters in a Fabry-Perot resonator — •Fabian Salamon1,2, Alexander Ulanowski1,2, Johannes Früh1,2, and Andreas Reiserer1,2 — 1Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany — 2TU München and Munich Center for Quantum Science and Technology, 85748 Garching, Germany
Erbium dopants are prime candidates for the realisation of extended quantum networks, as they combine second-long ground state coherence with a coherent optical transition in the telecommunication window, where loss in optical fibers is minimal [1].
To implement quantum information processing in this novel platform, we perform single-shot readout of the spin state by resonantly driving the optical transition and detecting the subsequently emitted photons. We overcome the challenge that erbium lacks a cycling transition [2] by using a Fabry-Perot resonator with a narrow linewidth (50 MHz) [3] in order to selectively enhance the readout transition.
Combined with our recent advances in spectral multiplexing [4], the successful implementation of high-fidelity single-shot readout is a key step towards high-rate entanglement of distant erbium dopants.
[1] A. Reiserer, arXiv:2205.15380 (2022).
[2] M. Raha et al., Nat. Commun. 11, 1605 (2020).
[3] B. Merkel, A. Ulanowski & A. Reiserer, Phys. Rev. X 10, 041025 (2020).
[4] A. Ulanowski, B. Merkel & A. Reiserer, Sci. Adv. 8, eabo4538 (2022).