Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:1301.0778 · Nature Communications

Ultrasensitive magnetic field detection using a single artificial atom

Mustafa Bal, C. Deng, Jean-Luc Orgiazzi, Florian R. Ong, Adrian Lupaşcu

Published Dec 21, 2012• 91 citations
arXivHTMLPDF
DOI
10.1038/ncomms2332

Related papers

Spectroscopy of Natural and Artificial Atoms in Magnetic Fields

E. Arimondo, D. Ciampini, Carlo Rizzo

Advances in atomic, molecular, and optical physics•Jan 1, 2016•10 citations

Electron paramagnetic resonance spectroscopy using a single artificial atom

Hiraku Toida, Yuichiro Matsuzaki, Kosuke Kakuyanagi +4 more

Abstract 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 ~400 spins·Hz−1/2 with a magnetic sensing volume around 10−14λ3 (50 femtoliters), where λ 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.

arXiv:1711.10148•Communications Physics•Mar 29, 2019•34 citations

Ultrasensitive magnetometer using a single atom

Christof Wunderlich

Bulletin of the American Physical Society•Jun 7, 2017•0 citations

Quantum-correlation-enhanced weak-field detection in an optomechanical system

Wen-Zhao Zhang, Li-Bo Chen, Jiong Cheng +1 more

A theoretical scheme is proposed to enhance the signal-to-noise ratio in ultrasensitive detection by quantum correlation in a composite optomechanical system. Introducing an auxiliary oscillator and treating it as an added probe for weak-field detection, the additional noise can be greatly suppressed, which may even break the standard quantum limit. A magnetic field is employed as an example to exhibit the detection capability of the scheme. The result shows that, compared with the traditional detection protocol, the scheme has a higher signal-to-noise ratio and a better detection accuracy. Furthermore, the signal intensity detection curve shows a good linearity. The results provide a promising platform for reducing the additional noise by utilizing quantum correlation in ultrasensitive detection.

arXiv:1811.08767•Physical Review A•Jun 7, 2019•24 citations

Sensing Magnetic Fields with an Array of Single Atoms

Andrea Parlangeli

Sensing Magnetic

Physics•Jun 4, 2024•0 citations

Quantum Sensing of Magnetic Fields

Anonymous

Physics•Jul 25, 2017•0 citations
Abstract 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 ~400 spins·Hz−1/2 with a magnetic sensing volume around 10−14λ3 (50 femtoliters), where λ 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.
A theoretical scheme is proposed to enhance the signal-to-noise ratio in ultrasensitive detection by quantum correlation in a composite optomechanical system. Introducing an auxiliary oscillator and treating it as an added probe for weak-field detection, the additional noise can be greatly suppressed, which may even break the standard quantum limit. A magnetic field is employed as an example to exhibit the detection capability of the scheme. The result shows that, compared with the traditional detection protocol, the scheme has a higher signal-to-noise ratio and a better detection accuracy. Furthermore, the signal intensity detection curve shows a good linearity. The results provide a promising platform for reducing the additional noise by utilizing quantum correlation in ultrasensitive detection.