Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 84: Poster: Quantum Networks

FM 84.8: Poster

Donnerstag, 26. September 2019, 16:30–18:30, Tents

Quantum repeater implementation based on a nitrogen-vacancy center in diamond — •Javid Javadzade, Florian Kaiser, Amlan Mukherjee, Erik Hesselmeier, Ilja Gerhardt, and Jörg Wrachtrup — 3rd Institute of Physics, University of Stuttgart and Institute for Quantum Science and Technology IQST, Stuttgart, Germany

Distribution of entanglement over large distances is a prerequisite for implementation of high-level quantum information tasks, e.g. quantum cryptography. While there are already commercial solutions for short distance point-to-point quantum links, a scalable approach towards long-distance quantum key distribution (QKD) calls for a quantum repeater based network architecture. By dividing the quantum communication channel in multiple nodes, channel losses are overcome and error correction can be implemented. Here, we outline our research strategy towards implementing an elementary quantum repeater node as a part of the Q.Link.X project, funded through the German BMBF. The repeater node will utilize a single nitrogen-vacancy center in diamond coupled to a nearby 13C nuclear spin, acting as quantum memory [1]. Our protocol is based on entanglement between solid-state spins and photonic time-bin modes. We will present the estimated entanglement rates and discuss further extensions and improvements.

[1] D. Luong et al. Appl. Phys. B, 122, 96 (2016)

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