Abstract:
: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.
journal_name
Sci Repjournal_title
Scientific reportsauthors
de Lange G,van der Sar T,Blok M,Wang ZH,Dobrovitski V,Hanson Rdoi
10.1038/srep00382subject
Has Abstractpub_date
2012-01-01 00:00:00pages
382issn
2045-2322journal_volume
2pub_type
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