Resolving remote nuclear spins in a noisy bath by dynamical decoupling design

Wenchao Ma, Fazhan Shi, Kebiao Xu, Pengfei Wang, Xiangkun Xu, Xing Rong, Chenyong Ju, Chang-Kui Duan, Nan Zhao, and Jiangfeng Du

Phys. Rev. A 92, 033418 – Published 18 September 2015

Abstract

We experimentally resolve several weakly coupled nuclear spins in diamond using a series of dynamical decoupling controls. Some nuclear spin signals, hidden by decoherence under ordinary dynamical decoupling controls, are shifted forward in time domain to the coherence time range and thus rescued from the fate of being submerged by the noisy spin bath. In this way, more and remote single nuclear spins are resolved. Additionally, the field of detection can be continuously tuned on subnanoscale. This method extends the capacity of nanoscale magnetometry and may be applicable in other systems for high-resolution noise spectroscopy.

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Received 16 December 2014
Revised 17 July 2015

DOI:https://doi.org/10.1103/PhysRevA.92.033418

Authors & Affiliations

Wenchao Ma¹, Fazhan Shi^1,2, Kebiao Xu¹, Pengfei Wang^1,2, Xiangkun Xu¹, Xing Rong^1,2, Chenyong Ju^1,2, Chang-Kui Duan^1,2, Nan Zhao^3,2, and Jiangfeng Du^1,2,*

¹Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
²Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
³Beijing Computational Science Research Center, Beijing 100084, China

^*djf@ustc.edu.cn

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Vol. 92, Iss. 3 — September 2015

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