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.
%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
}