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Near-resonance spin noise spectroscopy.

Chalupczak, W; Godun, R M (2011) Near-resonance spin noise spectroscopy. Phys. Rev. A, 83 (3). 032512

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Spectroscopy of atomic spin noise allows the determination of many sample properties such as energy level structures and transverse spin relaxation rates without the need to drive the system away from equilibrium with applied fields. Analysis of noise measurements can also reveal the processes that limit the sensitivity of a measured signal. Standard methods for spectroscopic noise measurements in atomic vapours rely on far off-resonant optical probing. We present a method for investigating spin noise with a probe beam frequency relatively close to resonance and show how the back-action of the probe on the atomic state can be subtracted from the recorded noise spectra. We verify this method experimentally by showing noise data that scales with the square root of the number of atoms, after the probe back-action has been properly subtracted.

Item Type: Article
Subjects: Time and Frequency
Time and Frequency > Optical Frequency Standards and Metrology
Identification number/DOI: 10.1103/PhysRevA.83.032512
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/4940

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