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arXiv:1901.09103 · Physical Review X

Quantum Interference of Electromechanically Stabilized Emitters in Nanophotonic Devices

Bartholomeus Machielse, Stefan Bogdanović, Srujan Meesala, Scarlett Gauthier, Michael J. Burek, Graham Joe, Michelle Chalupnik, Young-Ik Sohn, Jeffrey Holzgrafe, Ruffin E. Evans, Cleaven Chia, Haig A. Atikian, Mihir K. Bhaskar, Денис Дмитриевич Сукачев, Linbo Shao, S. Maity, Mikhail D. Lukin, Marko Lončar

Published Aug 9, 2019• 101 citations

Abstract

Photon-mediated coupling between distant matter qubits may enable secure communication over long distances, the implementation of distributed quantum computing schemes, and the exploration of new regimes of many-body quantum dynamics. Solid-state quantum emitters coupled to nanophotonic devices represent a promising approach towards these goals, as they combine strong lightmatter interaction and high photon collection efficiencies. However, nanostructured environments introduce mismatch and diffusion in optical transition frequencies of emitters, making reliable photonmediated entanglement generation infeasible. Here we address this long-standing challenge by employing silicon-vacancy color centers embedded in electromechanically deflectable nanophotonic waveguides. This electromechanical strain control enables control and stabilization of optical resonance between two silicon-vacancy centers on the hour timescale. Using this platform, we observe the signature of an entangled, superradiant state arising from quantum interference between two spatially separated emitters in a waveguide. This demonstration and the developed platform constitute a crucial step towards a scalable quantum network with solid-state quantum emitters.

DOI: 10.1103/physrevx.9.031022

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