Angular momentum alignment-to-orientation conversion in the ground state of Rb atoms at room temperature

Mozers, A.; Busaite, Laima; Osite, Dace; Auzinsh, M.

doi:10.1103/physreva.102.053102

Cited by 5 publications

(6 citation statements)

References 36 publications

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“…This condition reduces the differential equations to a system of linear equations. The explicit form of these equations, the description of terms appearing in these equations and solution methods can be found in [14,18]. For the analysis of the results, the multipole expansion of the density matrix can be used.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…The experimenter faces the choice of studying AOC in a given system using fluorescence from the excited state or absorption in the ground state. We had studied ground-state AOC in Rubidium previously by observing fluorescence signals [14]. Fluorescence signals are easy to distinguish from the background, but since fluorescence directly involves the excited state, it was challenging to disentangle excited-state AOC from groundstate AOC.…”

Section: Introductionmentioning

confidence: 99%

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Searching for alignment-to-orientation conversion in the ground state of atomic Cs with circularly polarized laser probe

Mozers

Busaite²,

Osite³

et al. 2023

J. Phys. B: At. Mol. Opt. Phys.

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In this study we explored the possibilities for observing the angular momentum alignment-to-orientation conversion (AOC) in the ground state of various alkali metals: K, Rb, Cs. For theoretical analysis we used a model that is based on the Optical Bloch equations for the density matrix. In our model we took into account the interaction of the laser light with all hyperfine levels, which are mixed as the magnetic field increases. The radiation's coherence properties were also included. Finally, the results were averaged over the Doppler profile. Additionally we simulated signals where the ground- or the excited-state coherent processes were numerically switched off in order to determine the origins of the features of the obtained signals. We also performed experiments on Cs atoms with two laser beams: a linearly polarized Cs D1 pump and circularly polarized Cs D2 probe. We used the pump beam to create angular momentum alignment in the ground state and observed the transmission signal of the probe beam as we changed the magnetic field. A detailed analysis of the experimentally obtained transmission signal from a single circularly polarized probe laser component is provided. Finally, prospects for observing AOC experimentally are discussed, as well as experiments were even a weak AOC signal could lead to systematic errors.

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Section: Theoretical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Searching for alignment-to-orientation conversion in the ground state of atomic Cs with circularly polarized laser probe

Mozers

Busaite²,

Osite³

et al. 2023

J. Phys. B: At. Mol. Opt. Phys.

Self Cite

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show abstract

“…The explicit form of these equations and the discription of terms appearing in these equations can be found in [23,25]. The polarization moments (multipole momnets) can be expressed in terms of the density matrix elements ρ m m [26]:…”

Section: Theoretical Modelmentioning

confidence: 99%

“…Previously AOC in an external magnetic field was studied in various atoms [18][19][20][21] and with a focus on the change of angular momentum distribution in the excited state [16,22]. Recently AOC has been studied also in the ground-state of rubidium atoms [23].…”

Section: Introductionmentioning

confidence: 99%

Alignment-to-orientation conversion in the ground state of atomic Cs with linearly polarized laser excitation

Mozers¹,

Busaite²,

Osite³

et al. 2020

Preprint

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“…The first two effects lead to the direction-dependent asymmetry of the magnetic resonance curve, and the third one leads to the direction-dependent shift of the magnetic resonance frequency. The NLZ and LS effects are also the source of alignment-to-orientation conversion [13,14].…”

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confidence: 99%

Heading-error-free optical atomic magnetometry in the Earth-field range

Zhang¹,

Kanta²,

Wickenbrock³

et al. 2022

Preprint

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Alkali-metal atomic magnetometry is widely used due to its high sensitivity and cryogen-free operation. However, when operating in geomagnetic field, it suffers from heading errors originating from nonlinear Zeeman (NLZ) splittings and magnetic resonance asymmetries, which lead to difficulties in mobile-platform measurements. We demonstrate an alignment based 87 Rb magnetometer, which, with only a single magnetic resonance peak and well-separated hyperfine transition frequencies, is insensitive or even immune to NLZ-related heading errors. It is shown that the magnetometer can be implemented for practical measurements in the geomagnetic environments and the photon-shot-noise-limited sensitivity reaches 9 fT/ √ Hz at room temperature.

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Angular momentum alignment-to-orientation conversion in the ground state of Rb atoms at room temperature

Cited by 5 publications

References 36 publications

Searching for alignment-to-orientation conversion in the ground state of atomic Cs with circularly polarized laser probe

Searching for alignment-to-orientation conversion in the ground state of atomic Cs with circularly polarized laser probe

Alignment-to-orientation conversion in the ground state of atomic Cs with linearly polarized laser excitation

Heading-error-free optical atomic magnetometry in the Earth-field range

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