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Conference on Lasers and Electro-Optics

Dipole-Dipole Interactions Between Pairs of Silicon-Vacancy Centers in Diamond

Matthew W. Day, Kelsey M. Bates, Christopher L. Smallwood, Rachel Owen, Ronald Ulbricht, Steven T. Cundiff

Published Jan 1, 2021• 1 citation
Publisher

Abstract

Silicon-vacancy centers in diamond are leading candidates for future quantum telecommunications, memory, and computing applications. We report dipole-dipole interactions between distinct silicon-vacancy centers in diamond with implications for quantum sensing and information exchange between centers.
DOI
10.1364/cleo_qels.2021.fth4l.6

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The silicon-vacancy center in diamond has recently attracted significant attention as a candidate for quantum information processing as it overcomes many of the optical issues present in the nitrogen-vacancy center. Historically it has been hampered by short dephasing times; however the recent development of high-purity samples at low temperatures resolves this issue. Hence it is timely to explore whether silicon-vacancy centers are useful for quantum tasks beyond single-photon sources. Here we investigate the potential of the silicon-vacancy center to realize two important operations required for quantum information processing: high-efficiency projective measurement and efficient single-qubit rotations. Due to its similar nature, the germanium-vacancy center is discussed as a point of comparison.
In recent years there has been substantial progress in solid-state quantum information demonstrations based on diamond. This ranges from room-temperature multi-qubit quantum registers to spin-photon entanglement to loophole-free Bell tests. Most of these demonstrations are done with the nitrogen-vacancy (NV) center. Recently however the silicon-vacancy (SiV) center has shown a much better coupling to photons, owing to the suppression of spectral diffusion. Still more recently the germanium-vacancy (GeV) has shown much higher quantum efficiency the SiV. However there are tradeoffs. In this talk I will review the various options for quantum information devices in diamond. I will also discuss new options for the future, including designer color centers made possible by novel diamond growth techniques.
Quantum Optics The development of scalable quantum systems will require the ability to control the interactions between the individual quantum building blocks of the system. Evans et al. used a pair of silicon vacancy centers embedded in a diamond nanocavity to show that interactions between the quantum emitters can be mediated optically (see the Perspective by Lodahl). Such optical control provides a speed advantage as well as the potential to develop an integrated platform for future quantum communication and quantum networking. Science , this issue p. [662][1]; see also p. [646][2] [1]: /lookup/doi/10.1126/science.aau4691 [2]: /lookup/doi/10.1126/science.aav3076