1. a CAS Key Laboratory of Quantum Information University of Science and Technology of China Hefei P.R. China
2. b CAS Center For Excellence in Quantum Information and Quantum Physics University of Science and Technology of China
3. c Hefei National Laboratory for Physical Science at Microscale and Department of Physics University of Science and Technology of China
网络首发:2021-04-18,
纸质出版:2021
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Yang Dong, Jing-Yan Xu, Shao-Chun Zhang, 等. Composite-pulse enhanced room-temperature diamond magnetometry[J]. Functional Diamond, 2021,1(1):125-134.
Yang Dong, Jing-Yan Xu, Shao-Chun Zhang, et al. Composite-pulse enhanced room-temperature diamond magnetometry[J]. Functional Diamond2021, 1(1): 125-134.
Yang Dong, Jing-Yan Xu, Shao-Chun Zhang, 等. Composite-pulse enhanced room-temperature diamond magnetometry[J]. Functional Diamond, 2021,1(1):125-134. DOI: 10.1080/26941112.2021.1898792.
Yang Dong, Jing-Yan Xu, Shao-Chun Zhang, et al. Composite-pulse enhanced room-temperature diamond magnetometry[J]. Functional Diamond2021, 1(1): 125-134. DOI: 10.1080/26941112.2021.1898792.
The sensitivity of practical solid quantum sensing can be boosted up by increasing the number of probes. However
the effects of spin dephasing caused by inhomogeneous broadening and imperfect quantum control can reduce the fidelity of quantum control and the sensitivity of quantum sensing with the dense ensemble of probes
such as nitrogen-vacancy (NV) centers in diamond. Here
we present a robust and effective composite-pulse for high fidelity operation against inhomogeneous broadening and control errors
via
optimized modulation of the control field. Such a composite-pulse was verified on NV center to keep high fidelity quantum control up to a spectrum detuning as large as 110% of Rabi frequency. The sensitivity of the magnetometer with NV center ensemble was experimentally improved by a factor of 4
comparing to dynamical decoupling with a normal rectangular pulse. Our work marks an important step towards high trustworthy ultra-sensitive quantum sensing with imperfect quantum control in practical applications. The used principle is universal and not restricted to NV center ensemble magnetometer.
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