Suppression of spin-bath and low-frequency noise for submegahertz ac magnetometry based on a doubly dressed spin qubit in diamond
- Authors
- Kihwan Kim; Yisoo Na; Jungbae Yoon; Dongkwon Lee; Hee Seong Kang; Chul-Ho Lee; Chulki Kim; Donghun Lee
- Issue Date
- 2025-06
- Publisher
- American Physical Society
- Citation
- Physical Review Applied, v.23, no.6
- Abstract
- We experimentally demonstrate a protocol that effectively suppresses low-frequency noise, including the qubit-bath interaction in diamond. This enables the detection of ac signals below 1 MHz with an increased signal-to-noise ratio of up to approximately 17. The method is based on ac magnetometry with single- and doubly dressed states, which are adiabatically transferred from the initial bare qubit states via concatenated continuous dynamical decoupling. We compare the dressed-state protocols with a conventional pulsed dynamical decoupling method, XY16. This work paves an alternative way toward the sensitive detection of weakly coupled nuclear spins in low-field NMR experiments and submegahertz ac magnetometry.
- URI
- https://pubs.kist.re.kr/handle/201004/152584
- DOI
- 10.1103/PhysRevApplied.23.064004
- Appears in Collections:
- KIST Article > Others
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