All-optical control of the silicon-vacancy spin in diamond at millikelvin temperatures

Abstract

The silicon-vacancy center in diamond offers attractive opportunities in quantum photonics due to its favorable optical properties and optically addressable electronic spin. Here, we combine both to achieve all-optical coherent control of its spin states. We utilize this method to explore spin dephasing effects in an impurity-rich sample beyond the limit of phonon-induced decoherence: Employing Ramsey and Hahn-echo techniques at 12mK base temperature we identify resonant coupling to a substitutional nitrogen spin bath as the limiting decoherence source for the electron spin.

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• Optical control protocols for high-fidelity spin rotations of single SiV${}^{-}$ and SnV${}^{-}$ centers in diamond
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• Methods to Accelerate High-Throughput Screening of Atomic Qubit Candidates in van der Waals Materials
• Quantum computation in silicon-vacancy centers based on nonadiabatic geometric gates protected by dynamical decoupling
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• From Heat Capacity to Coherence in Ultra-Narrow-Linewidth Solid-State Optical Emitters at Sub-Kelvin Temperatures
• Quantum Orbital-State Control of a Neutral Nitrogen-Vacancy Center at Millikelvin Temperatures