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

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.

SUBMITTER: Morishita H 

PROVIDER: S-EPMC6746786 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature