Magneto-optical effects and rf magnetic field detection in cold rubidium atoms

Sycz, Krystian; Wojciechowski, Adam; Gawlik, Wojciech

doi:10.1088/1742-6596/497/1/012006

Cited by 5 publications

(6 citation statements)

References 20 publications

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“…2a) results from a linear Faraday rotation, while the central, much narrower resonance ( Fig. 2b) reflects the NFE caused by the Zeeman coherence [12,13]. Figure 2c shows the observed signals measured for different interaction times of atoms with light.…”

Section: Single-beam Magneto-optical Rotationmentioning

confidence: 96%

“…Here, we focus on the coherences of Zeeman sublevels described by non-diagonal elements of density matrix with |m| = 2. The coherences contribute to atomic alignment and can be monitored by a linearly polarized probe beam as a rotation of its polarization plane 12,13,14 . In time-dependent measurements atomic alignment manifests as oscillations at the frequency of 2L and are usually damped faster than polarization signals (Fig.…”

Section: Fid Of Atomic Coherencesmentioning

confidence: 99%

“…The effect of optical rotation in a magnetic field (Faraday effect) results from light detuning and population distribution 9,10,11 . Sufficiently strong light may not only probe, but also modify the atomic states and create their coherence 12,13,14 leading to the observation of the time-dependent, nonlinear magneto-optical rotation or nonlinear Faraday effect (NFE). This process is closely related with the electromagnetically induced transparency 15 , electromagnetically induced absorption 16 , coherent population trapping 17 and other manifestations of the interference effects in coherently prepared media 18,19 .…”

Section: Introductionmentioning

confidence: 99%

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Atomic-state diagnostics and optimization in cold-atom experiments

Sycz

Wojciechowski

Gawlik

2018

Sci Rep

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We report on the creation, observation and optimization of superposition states of cold atoms. In our experiments, rubidium atoms are prepared in a magneto-optical trap and later, after switching off the trapping fields, Faraday rotation of a weak probe beam is used to characterize atomic states prepared by application of appropriate light pulses and external magnetic fields. We discuss the signatures of polarization and alignment of atomic spin states and identify main factors responsible for deterioration of the atomic number and their coherence and present means for their optimization, like relaxation in the dark with the strobed probing. These results may be used for controlled preparation of cold atom samples and in situ magnetometry of static and transient fields.

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Section: Single-beam Magneto-optical Rotationmentioning

confidence: 96%

Section: Fid Of Atomic Coherencesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Atomic-state diagnostics and optimization in cold-atom experiments

Sycz

Wojciechowski

Gawlik

2018

Sci Rep

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“…The precession of F around B changes the optical absorption and dispersion properties of the atomic ensemble by passing in and out of resonance with the incident polarised electric field. Thus, the precession can be observed as a damped oscillation in the optical absorption and dispersion, measured using a polariser and detector, to give a direct measurement of |B| [20][21][22][23] .…”

Section: Magnetic Sensing For a Low Temperature Molassesmentioning

confidence: 99%

Grating chips for quantum technologies

McGilligan

Griffin

Elvin

et al. 2017

Sci Rep

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We have laser cooled 3 × 106 87Rb atoms to 3 μK in a micro-fabricated grating magneto-optical trap (GMOT), enabling future mass-deployment in highly accurate compact quantum sensors. We magnetically trap the atoms, and use Larmor spin precession for magnetic sensing in the vicinity of the atomic sample. Finally, we demonstrate an array of magneto-optical traps with a single laser beam, which will be utilised for future cold atom gradiometry.

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“…One way to remove the effect of the magnetic field is through a passive shielding of the stray magnetic field [160]. As described in Appendix C, this is employed around the Zeeman slower.…”

Section: Part II Coherent Transmission Under Magnetic Fieldmentioning

confidence: 99%

Coherent transmission of light through a cold atomic cloud

Kwong¹

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Magneto-optical effects and rf magnetic field detection in cold rubidium atoms

Cited by 5 publications

References 20 publications

Atomic-state diagnostics and optimization in cold-atom experiments

Atomic-state diagnostics and optimization in cold-atom experiments

Grating chips for quantum technologies

Coherent transmission of light through a cold atomic cloud

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