DPG Phi
Verhandlungen
Verhandlungen
DPG

Erlangen 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

Q: Fachverband Quantenoptik und Photonik

Q 47: Quantum Information (Quantum Communication and Quantum Repeater)

Q 47.5: Vortrag

Donnerstag, 17. März 2022, 11:30–11:45, Q-H12

Spectral multiplexing of individual Erbium dopants with stable transition frequency — •Alexander Ulanowski1, Benjamin Merkel1, and Andreas Reiserer1,21MPI of Quantum Optics, Garching, Germany — 2Munich Center for Quantum Science and Technology (MCQST), Ludwig-Maximilians-Universität München, München, Germany

In a future quantum internet, coherent emitters will exchange quantum states over global distances, preferably using optical fibers. Erbium dopants exhibit an optical transition at telecommunication wavelength that would enable a low-loss transmission over long distances. To achieve an efficient spin-photon interface for single dopants, we embed a thin crystalline membrane into a tunable Fabry-Perot resonator with a finesse of 9.0(7)·104 which leads up to a 70-fold Purcell enhancement. Our approach avoids the proximity of the emitters to interfaces and thus allows us to preserve the coherence up to the lifetime limit [1]. At the tail of the inhomogeneous broadening we spectrally resolve and control around 100 individual dopants with low spectral diffusion below 0.2 MHz [2]. Furthermore, at high magnetic fields some dopants reveal slow diffusion dynamics, allowing us to apply a feed-forward correction on the emission frequency and reducing the linewidth down to 0.1 MHz. Our findings enable frequency-multiplexed spin-qubit readout, control and entanglement, opening unique perspectives for the implementation of repeater nodes in a quantum network.

[1] B. Merkel et al., Phys.Rev.X 10, 041025 (2020).

[2] A. Ulanowski, B. Merkel, A. Reiserer, ArXiv:2110.09409 (2021).

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2022 > Erlangen