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Q: Fachverband Quantenoptik und Photonik

Q 43: QI Poster II (joint session QI/Q)

Q 43.56: Poster

Mittwoch, 8. März 2023, 16:30–19:00, Empore Lichthof

Quantum network with interacting network qubits — •Emanuele Distante, Severin Daiss, Stefan Langenfeld, Stephan Welte, Philip Thomas, Lukas Hartung, Olivier Morin, and Gerhard Rempe — Max Planck Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany

Quantum networks can be realized out of single atoms trapped at the centre of optical resonators which stand at the network nodes and are then connected via optical fibres. In this platform, quantum information is stored into the long-lived ground states of an atom, and the resonator provide an efficient way to entangle the atomic states with flying optical photons. Traveling over the network via the fibres, photons can not only distribute the entanglement over large distance but also provide a means for making two largely separated atoms interact. In this poster we will show how this effective long-distance interaction can be exploited for the realization of different protocols. First, we present a quantum logic gate between distant atoms[1], which denote a rudimental example of distributed quantum computation, then we show the realization of a novel quantum teleportation scheme[2], as well as realization of joint nondestructive measurement on distant qubits leading to entanglement[3].

[1] S. Daiss et al., Science 371, 614-617 (2021)

[2] S. Langenfeld et al., Phys. Rev. Lett. 126, 130502 (2021)

[3] S. Welte et al., Nat. Phot. 15, 504-509 (2021)