Electron paramagnetic resonance spectroscopy using a single artificial atom

被引：22
作者：
Toida, Hiraku [1 ]
Matsuzaki, Yuichiro [1 ]
Kakuyanagi, Kosuke [1 ]
Zhu, Xiaobo [1 ,2 ]
Munro, William J. [1 ]
Yamaguchi, Hiroshi [1 ]
Saito, Shiro [1 ]
机构：
[1] NTT Corp, NTT Basic Res Labs, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 2430198, Japan
[2] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China
来源：
COMMUNICATIONS PHYSICS | 2019年 / 2卷
关键词：
MAGNETIC-RESONANCE; FLUX QUBIT; SPIN; SENSITIVITY;
D O I：
10.1038/s42005-019-0133-9
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Electron paramagnetic resonance ( EPR) spectroscopy is an important technology in physics, chemistry, materials science, and biology. Sensitive detection with a small sample volume is a key objective in these areas, because it is crucial, for example, for the readout of a highly packed spin based quantum memory or the detection of transition metals in biomaterials. Here, we demonstrate a novel EPR spectrometer using a single artificial atom as a sensitive detector of spin magnetization. The artificial atom, a superconducting flux qubit, provides advantages in terms of its strong coupling with magnetic fields. We estimate a sensitivity of similar to 400 spins.Hz(-1/2) with a magnetic sensing volume around 10(-14)lambda(3) (50 femtoliters), where lambda is the wavelength of the irradiated microwave. Our artificial atom works as a highly sensitive EPR spectrometer with micron-scale area with future opportunity for measuring single spins on the nanometer scale.
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页数：7
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