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Q: Fachverband Quantenoptik und Photonik

Q 19: Quantum Information (Quantum Repeater) I

Q 19.1: Vortrag

Montag, 11. März 2019, 16:15–16:30, S HS 001 Chemie

Atom-to-photon quantum state mapping into the telecom range — •Stephan Kucera, Matthias Bock, Pascal Eich, Christoph Becher, and Jürgen Eschner — Universität des Saarlandes, Experimentalphysik, 66123 Saarbrücken

Quantum interfaces between atomic nodes and photonic quantum channels are essential building blocks for single-atom based quantum networks. In previous work, we demonstrated photon-to-atom quantum state transfer from a polarization qubit at 854 nm onto the spin qubit of a single trapped ⁴⁰Ca⁺ ion and atom-to-photon quantum state mapping onto a single 393 nm photon [1,2]. Here, we extend the latter atom-to-photon interface to near IR wavelength at 854 nm, and connect it to the low-loss telecom O-band at 1310 nm via state-of-the-art high-fidelity quantum frequency conversion [3].

[1] C. Kurz et al., Nat. Commun. 5, 5527 (2014)

[2] C. Kurz et al., Phys. Rev. A 93, 062348 (2016)

[3] M. Bock et al., Nat. Commun. 9, 1998 (2018)