We experimentally demonstrate a protocol that effectively suppresses the qubit-bath interaction in diamond and enables detection of weak AC signals (below 1 MHz) with enhanced signal-to-noise ratio (SNR) up to SNR = 17. The method is based on AC magnetometry with single- and double-dressed states that are adiabatically transferred from the initial qubit states using concatenated continuous dynamical decoupling. This work paves a way toward sensitive detection of weakly coupled nuclear spins in low-field NMR experiments.
@article{arxiv.2207.06611,
title = {Suppression of spin bath and low-frequency noise for sub-MHz AC magnetometry based on double-dressed spin qubit in diamond},
author = {Kihwan Kim and Yisoo Na and Jungbae Yoon and Dongkwon Lee and Hee Seong Kang and Chul-Ho Lee and Donghun Lee},
journal= {arXiv preprint arXiv:2207.06611},
year = {2025}
}
Comments
35 pages including 14 figures and supplemental materials