Controlling the quantum dynamics of a mesoscopic spin bath in diamond.

Controlling the quantum dynamics of a mesoscopic spin bath in diamond.
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DOI:
10.1038/srep00382
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发表时间:
2012
期刊:
影响因子:
4.6
通讯作者:
Hanson, Ronald
Hanson, Ronald
中科院分区:
综合性期刊3区
文献类型:
--
作者:
de Lange, Gijs;van der Sar, Toeno;Blok, Machiel;Wang, Zhi-Hui;Dobrovitski, Viatcheslav;Hanson, Ronald

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Understanding and mitigating decoherence is a key challenge for quantum science and technology. The main source of decoherence for solid-state spin systems is the uncontrolled spin bath environment. Here, we demonstrate quantum control of a mesoscopic spin bath in diamond at room temperature that is composed of electron spins of substitutional nitrogen impurities. The resulting spin bath dynamics are probed using a single nitrogen-vacancy (NV) centre electron spin as a magnetic field sensor. We exploit the spin bath control to dynamically suppress dephasing of the NV spin by the spin bath. Furthermore, by combining spin bath control with dynamical decoupling, we directly measure the coherence and temporal correlations of different groups of bath spins. These results uncover a new arena for fundamental studies on decoherence and enable novel avenues for spin-based magnetometry and quantum information processing.
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