Extension of the Coherence Time by Generating MW Dressed States in a Single NV Centre in Diamond
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Abstract Nitrogen-vacancy (NV) centres in diamond hold promise in quantum sensing applications. A major interest in them is an enhancement of their sensitivity by the extension of the coherence time (T2). In this report, we experimentally generated more than four dressed states in a single NV centre in diamond based on Autler-Townes splitting (ATS). We also observed the extension of the coherence time to T2 ~ 1.5 ms which is more than two orders of magnitude longer than that of the undressed states. As an example of a quantum application using these results we propose a protocol of quantum sensing, which shows more than an order of magnitude enhancement in the sensitivity.
2020 ◽
Vol 53
(31)
◽
pp. 313001
◽
2015 ◽
Vol 15
(15&16)
◽
pp. 1397-1419
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