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All-Optical Control of the Silicon-Vacancy Spin in Diamond at Millikelvin Temperatures
Jonas N Becker1, Benjamin Pingault2, David Groß1
1Naturwissenschaftlich-Technische Fakultät, Fachbereich Physik, Universität des Saarlandes, Campus E2.6, 66123 Saarbrücken, Germany.
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 temperatures down to 40 mK we identify resonant coupling to a substitutional nitrogen spin bath as limiting decoherence source for the electron spin.
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