Zou, Junwen;
Hogan, Stephen D;
(2023)
Absolute static-field magnetometry, magnetic gradiometry, and vector electrometry with circular Rydberg atoms.
Physical Review A
, 107
(6)
, Article 062820. 10.1103/physreva.107.062820.
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Abstract
Helium atoms in pulsed supersonic beams have been prepared in the circular Rydberg state with principal quantum number n = 55 using the crossed-fields method. High-resolution microwave spectroscopy of the transition from this state to the n = 56 circular state, at frequencies close to 38.5 GHz, was performed to measure static magnetic and electric fields along the axis of propagation of the beams with quantum-state-selective detection by pulsed-electric-field ionization. Magnetic fields of between 1.3 and 1.6 mT were measured to a relative precision of ±900 nT by rf spectroscopy and ±1.3 µT by microwave spectroscopy, with absolute calibration, accounting for Doppler shifts and effects of weak stray electric fields to ±2.0 µT and a spatial resolution of ±0.87 mm. Magnetic-field gradients could be determined to a precision of ±1.49 µT/mm (±53 nT/mm) over a baseline of 1.74 mm (35 mm). To perform these measurements, static electric fields and contributions from the motional Stark effect were minimized, and residual electric fields in each of the three spatial dimensions in the apparatus were measured to an absolute precision of between ±85 and ±750 µV/cm. The methods used in this work can be transferred to experiments with other atoms or molecules. They are therefore well suited for applications in minimally invasive, absolute static-field magnetometry and electrometry, for example, at hybrid interfaces between Rydberg atoms and superconducting circuits; in tests of bound-state QED or the weak equivalence principle with atomic or molecular hydrogen, antihydrogen, or positronium; and in measurements of the absolute neutrino mass by cyclotron radiation emission spectroscopy.
| Type: | Article |
|---|---|
| Title: | Absolute static-field magnetometry, magnetic gradiometry, and vector electrometry with circular Rydberg atoms |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/physreva.107.062820 |
| Publisher version: | https://doi.org/10.1103/PhysRevA.107.062820 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10172549 |
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