Project R-14493

Spin-Photon Interface for Quantum Networks (Research)

The goal of the EU is to become a leader in the development of quantum technologies to strengthen the economics. The quantum communication is one of the pillars of this important goal and comprises fundamentally secure communication with distributed quantum computation and sensing. The most promising platform to achieve this goal is color centers in diamond. For example, it has been already shown that nitrogen-vacancy (NV) center coupled to nuclear spins can constitute small quantum register and even can transmit quantum information over kilometer range. NV has very bad optical properties making it extremely hard to use beyond proof-ofprinciple demonstration. Alternative color centers (group-IV defects) offer very good optical properties, however, to fully access their potential, they have to be embedded into nanophotonic cavities. Only then the communication rate can reach the value acceptable for practical use. This proposal aims to develop nanophotonic cavities with deterministically incorporated group-IV defects, thus overcoming current bottleneck for further development of quantum communication networks. The intended approach use advantage of possibility to generate photonic cluster states, which mitigates transmission loss combined with enhance communication rates. This work aim for a hardware for quantum communication infrastructure

01 March 2024 - 28 February 2029