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Enhanced solid-state multispin metrology using dynamical decoupling
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DOI：10.1103/PhysRevB.86.045214.png)
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Abstract
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We use multipulse dynamical decoupling to increase the coherence lifetime (T-2) of large numbers of nitrogen-vacancy (NV) electronic spins in room temperature diamond, thus enabling scalable applications of multispin quantum information processing and metrology. We realize an order-of-magnitude extension of the NV multispin T-2 in three diamond samples with widely differing spin impurity environments. In particular, for samples with nitrogen impurity concentration less than or similar to 1 ppm, we extend T-2 to >2 ms, comparable to the longest coherence time reported for single NV centers, and demonstrate a tenfold enhancement in NV multispin sensing of ac magnetic fields.
Keywords:
ELECTRONIC SPIN
NANOSCALE
COHERENCE
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3.7
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15.4W
Citations:
41.0W
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