48 citations · 101 across the 11 of their papers we have counts for
11 papers
Optical control and coherent coupling of spin diffusive modes in thermal gases
P. Bevington, J. Nicholson, J. D. Zipfel +3
Collective spins in thermal gases are at the core of a multitude of science and technology applications. In most of them, the random thermal motion of the particles is considered d…
Indirect pumping of alkali-metal gases in a miniature silicon-wafer cell
J. D. Zipfel, P. Bevington, L. Wright +5
Atom spin sensors occupy a prominent position in the scenario of quantum technology, as they can combine precise measurements with appealing miniature packages which are crucial fo…
Polarisation of radio-frequency magnetic fields in magnetic induction measurements with an atomic magnetometer
L. M. Rushton, L. M. Ellis, J. D. Zipfel +2
We explore properties of the radio-frequency atomic magnetometer, specifically its sensitivity to the polarisation of an oscillating magnetic field. This aspect can be particularly…
Identification of object composition with Magnetic Inductive Tomography
R. Gartman, W. Chalupczak
The inductive response of an object to an oscillating magnetic field reveals information about its electrical conductivity and magnetic permeability. Here we introduce a technique…
Spin noise spectroscopy of a noise-squeezed atomic state
V. Guarrera, R. Gartman, G. Bevilacqua +1
Spin noise spectroscopy is emerging as a powerful technique for studying the dynamics of various spin systems also beyond their thermal equilibrium and linear response. Here, we st…
Dual frequency caesium spin maser
Patrick Bevington, Rafal Gartman, Yevgeny V. Stadnik +1
Co-magnetometers have been validated as valuable components of the atomic physics toolbox in fundamental and applied physics. So far, the explorations have been focused on systems…
Linear and non-linear coherent coupling in a Bell-Bloom magnetometer
R. Gartman, V. Guarrera, G. Bevilacqua +1
Spin-exchange collisions in hot vapours are generally regarded as a decoherence mechanism. In contrast, we show that linear and non-linear spin-exchange coupling can lead to the ge…
Parametric amplification and noise-squeezing in room temperature atomic vapours
V. Guarrera, R. Gartman, G. Bevilacqua +2
We report on the use of parametric excitation to coherently manipulate the collective spin state of an atomic vapour at room temperature. Signatures of the parametric excitation ar…
Enhanced material defects imaging with a radio-frequency atomic magnetometer
P. Bevington, R. Gartman, W. Chalupczak
Imaging of structural defects in a material can be realized with a radio-frequency atomic magnetometer by monitoring the material's response to a radio-frequency excitation field.…
Imaging of material defects with a radio-frequency atomic magnetometer
P. Bevington, R. Gartman, W. Chalupczak
Non-destructive eddy current testing of defects in metal plates using the magnetic resonance signal of a radio-frequency atomic magnetometer is demonstrated. The shape and amplitud…
Cancellation of the collisional frequency shift in caesium fountain clocks
K. Szymaniec, W. Chalupczak, E. Tiesinga +3
We have observed that the collisional frequency shift in primary caesium fountain clocks varies with the clock state population composition and, in particular, is zero for a given…