Extension of the Coherence Time by Generating MW Dressed States in a Single NV Centre in Diamond

Author:

Morishita H.ORCID,Tashima T.,Mima D.,Kato H.ORCID,Makino T.,Yamasaki S.,Fujiwara M.,Mizuochi N.ORCID

Abstract

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.

Publisher

Springer Science and Business Media LLC

Subject

Multidisciplinary

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