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arXiv · 1201.5686

Enhanced solid-state multi-spin metrology using dynamical decoupling

L. M. Pham·N. Bar-Gill·C. Belthangady·D. Le Sage·P. Cappellaro·M. D. Lukin·A. Yacoby·R. L. Walsworth
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Abstract

We use multi-pulse dynamical decoupling to increase the coherence lifetime (T2) of large numbers of nitrogen-vacancy (NV) electronic spins in room temperature diamond, thus enabling scalable applications of multi-spin quantum information processing and metrology. We realize an order-of-magnitude extension of the NV multi-spin T2 for diamond samples with widely differing spin environments. For samples with nitrogen impurity concentration <~1 ppm, we find T2 > 2 ms, comparable to the longest coherence time reported for single NV centers, and demonstrate a ten-fold enhancement in NV multi-spin sensing of AC magnetic fields.

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L. M. Pham, N. Bar-Gill, C. Belthangady, D. Le Sage, P. Cappellaro, M. D. Lukin, A. Yacoby, R. L. Walsworth. 2012-01-27. Enhanced solid-state multi-spin metrology using dynamical decoupling. https://doi.org/10.1103/physrevb.86.045214

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