%0 Generic %1 sukachev2017siliconvacancy %A Sukachev, Denis D. %A Sipahigil, Alp %A Nguyen, Christian T. %A Bhaskar, Mihir K. %A Evans, Ruffin E. %A Jelezko, Fedor %A Lukin, Mikhail D. %D 2017 %K QO %T The silicon-vacancy spin qubit in diamond: quantum memory exceeding ten milliseconds and single-shot state readout %U http://arxiv.org/abs/1708.08852 %X The negatively-charged silicon-vacancy (SiV$^-$) color center in diamond has recently emerged as a promising system for quantum photonics. Its symmetry-protected optical transitions enable creation of indistinguishable emitter arrays and deterministic coupling to nanophotonic devices. Despite this, the longest coherence time associated with its electronic spin achieved to date ($250$ ns) has been limited by coupling to acoustic phonons. We demonstrate coherent control and suppression of phonon-induced dephasing of the SiV$^-$ electronic spin coherence by five orders of magnitude by operating at temperatures below 500 mK. By aligning the magnetic field along the SiV$^-$ symmetry axis, we demonstrate spin-conserving optical transitions and single-shot readout of the SiV$^-$ spin with 89% fidelity. Coherent control of the SiV$^-$ spin with microwave fields is used to demonstrate a spin coherence time $T_2$ of 13 ms and a spin relaxation time $T_1$ exceeding 1 s at 100 mK. These results establish the SiV$^-$ as a promising solid-state candidate for the realization of scalable quantum networks.

@misc{sukachev2017siliconvacancy, abstract = {The negatively-charged silicon-vacancy (SiV$^-$) color center in diamond has recently emerged as a promising system for quantum photonics. Its symmetry-protected optical transitions enable creation of indistinguishable emitter arrays and deterministic coupling to nanophotonic devices. Despite this, the longest coherence time associated with its electronic spin achieved to date ($\sim 250$ ns) has been limited by coupling to acoustic phonons. We demonstrate coherent control and suppression of phonon-induced dephasing of the SiV$^-$ electronic spin coherence by five orders of magnitude by operating at temperatures below 500 mK. By aligning the magnetic field along the SiV$^-$ symmetry axis, we demonstrate spin-conserving optical transitions and single-shot readout of the SiV$^-$ spin with 89% fidelity. Coherent control of the SiV$^-$ spin with microwave fields is used to demonstrate a spin coherence time $T_2$ of 13 ms and a spin relaxation time $T_1$ exceeding 1 s at 100 mK. These results establish the SiV$^-$ as a promising solid-state candidate for the realization of scalable quantum networks.}, added-at = {2017-08-30T11:27:29.000+0200}, author = {Sukachev, Denis D. and Sipahigil, Alp and Nguyen, Christian T. and Bhaskar, Mihir K. and Evans, Ruffin E. and Jelezko, Fedor and Lukin, Mikhail D.}, biburl = {https://www.bibsonomy.org/bibtex/2111d443a9130e743767ce3f091fbde1b/sahand}, interhash = {8050b252d1875abdecdf8525605a8041}, intrahash = {111d443a9130e743767ce3f091fbde1b}, keywords = {QO}, note = {cite arxiv:1708.08852}, timestamp = {2017-08-30T11:27:29.000+0200}, title = {The silicon-vacancy spin qubit in diamond: quantum memory exceeding ten milliseconds and single-shot state readout}, url = {http://arxiv.org/abs/1708.08852}, year = 2017 }