Enhanced solid-state multi-spin metrology using dynamical decoupling

Details Enhanced solid-state multi-spin metrology using dynamical decoupling Enhanced solid-state multi-spin metrology using dynamical decoupling

2012-01-27

arxiv.org/abs/1201.5686v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

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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