Adiabatic quantum sensor
POSTER
Abstract
Adiabatic quantum sensors (AQS) offer a unique combination of capabilities, including high-sensitivity broadband operation (projected 10 fT/Hz1/2 over 100 kHz bandwidth), minimal requirements on the magnetic-field environment, large dynamic range, and exceptional long-term stability. These features enable gradiometric subtraction of background fields at levels orders of magnitude beyond conventional magnetometers.
Following our recent theoretical proposal of adiabatic quantum sensing, we have demonstrated laboratory operation of an AQS with high sensitivity and are currently validating its predicted performance advantages. In preliminary experiments, we achieve a sensitivity of 300 fT/Hz1/2 with a 100 kHz bandwidth; further optimization is expected to yield substantially improved sensitivity. We also plan to demonstrate high-level gradiometric noise suppression, enabling sensitive magnetic-field detection in open and uncontrolled environments.
A key target application is the remote detection of magnetic fields at large stand-off distances (≥100 m) over a spectral range significantly broader than that accessible with existing atomic magnetometers, and with sensitivity exceeding that of classical sensors. Depending on the application, such as open-environment magnetocardiography, an adjustable bias field allows trading sensitivity for spectral bandwidth.
Following our recent theoretical proposal of adiabatic quantum sensing, we have demonstrated laboratory operation of an AQS with high sensitivity and are currently validating its predicted performance advantages. In preliminary experiments, we achieve a sensitivity of 300 fT/Hz1/2 with a 100 kHz bandwidth; further optimization is expected to yield substantially improved sensitivity. We also plan to demonstrate high-level gradiometric noise suppression, enabling sensitive magnetic-field detection in open and uncontrolled environments.
A key target application is the remote detection of magnetic fields at large stand-off distances (≥100 m) over a spectral range significantly broader than that accessible with existing atomic magnetometers, and with sensitivity exceeding that of classical sensors. Depending on the application, such as open-environment magnetocardiography, an adjustable bias field allows trading sensitivity for spectral bandwidth.
*This work was supported by the US Department of Energy National Nuclear Security Administration's Office of Defense Nuclear Nonproliferation Research & Development (DNN R&D) at Los Alamos National Laboratory under contract 89233218CNA000001.
Presenters
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Igor M Savukov
- Los Alamos National Laboratory (LANL)