Quantum Nodes for Quantum Repeaters (Prof. Hugues de Riedmatten)

Date: Feb 14, 2023
Time: 02:30 PM (Local Time Germany)
Speaker: Prof. Hugues de Riedmatten
ICFO- The Institute of Photonic Sciences-Mediterranean Technology Park, 08860 Castelldefels (Spain) ICREA- Catalan Institution for Research and Advanced studies 08015 Barcelona (Spain)
Location: Max Planck Institute of Quantum Optics
Room: Herbert Walther Lecture Hall

The distribution of entanglement between the nodes of a quantum network will allow new advances e.g. in long distance quantum communication, distributed quantum computing and quantum sensing. The realization of large-scale quantum networks will require quantum repeaters. The nodes of a quantum repeater are matter systems that should efficiently interact with quantum light, allow entanglement with photons (ideally at telecommunication wavelengths) and serve as a quantum memory allowing long-lived, faithful and multiplexed storage of (entangled) quantum bits.

In this talk, after introducing the context I will describe our recent progress towards the realization of quantum repeater nodes with multiplexed ensemble-based quantum memories, using cryogenically cooled rare-earth ion doped solids. I will also describe our efforts to distribute quantum information between disparate quantum nodes and to scale up quantum repeater links, including light-matter and matter-matter entanglement experiments as well as light to matter quantum teleportation. Finally, I will explain our current work to build quantum processing nodes using e.g. single rare-earth ions in nanoparticles or ensembles of cold Rydberg atoms.
J. V. Rakonjac, G. Corrielli, D. Lago-Rivera, A. Seri, M. Mazzera, S. Grandi, R. Osellame, and H. de Riedmatten, Storage and analysis of light-matter entanglement in a fiber-integrated System, Sci. Adv. 8, eabn3919 (2022)
N. Maring, P. Farrera, K. Kutluer, M. Mazzera, G. Heinze and H. de Riedmatten, Photonic quantum state transfer between a cold atomic gas and a crystal. Nature 551, 485 (2017)
D. Lago-Rivera, S. Grandi, J. V. Rakonjac, A. Seri and H. de Riedmatten, Telecom-heralded entanglement between multimode solid-state quantum memories, Nature 594, 37 (2021)
D. Lago-Rivera, J. Rakonjac, S. Grandi and H de Riedmatten, Multiplexed quantum teleportation from a photonic telecom qubit to a solid-state qubit