Ultra-sensitive single-beam atom-optical magnetometer using weak measurement method

Francis, T. J. Vineeth; Suna, Rashmi Ranjan; Madhu, P.K.; Viswanathan, Nirmal K.; Rajalakshmi, G.

doi:10.1063/1.5090581

Cited by 3 publications

(1 citation statement)

References 33 publications

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“…Interest in such single-electron atomic media is caused by the simplicity of energy levels and the presence of strong optical transitions in the visible and near infrared, for which narrow-linewidth cw lasers are widely available. In recent decades, various magneto-optical processes in vapors of alkali metals have been intensively investigated, which is in particular due to interest in the development of new schemes of optical magnetometry [4,5,6]. Among these processes is modification of the frequency and intensity of optical transitions between individual magnetic sublevels of the hyperfine structure of atoms in a magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Transition cancellations of $^{87}$Rb and $^{85}$Rb atoms in a magnetic field setting new standards

Aleksanyan,

Momier,

Gazazyan

et al. 2020

Preprint

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We have analyzed the magnetic field dependences of intensities of all the optical transitions between magnetic sublevels of hyperfine levels, excited with σ + , π and σ − polarized light, for the D1 and D2 lines of 87 Rb and 85 Rb atoms. Depending on the type of transition and the quantum numbers of involved levels, the Hamiltonian matrices are of 1 × 1, 2 × 2, 3 × 3 or 4 × 4 dimension. As an example, analytical expressions are presented for the case of 2 × 2 dimension matrices for D1 line of both isotopes. Eigenvalues and eigenkets are given, and the expression for the transition intensity as a function of B has been determined. It is found that some π transitions of 87 Rb and 85 Rb get completely canceled for certain, extremely precise, values of B. No cancellation occurs for σ + or σ − transitions of D1 line. For matrices with size over 2 × 2, analytical formulas are heavy, and we have performed numerical calculations. All the B values cancelling σ + , π and σ − transitions of D1 and D2 lines of 87 Rb and 85 Rb are calculated, with an accuracy limited by the precision of the involved physical quantities. We believe our modeling can serve as a tool for determination of standardized values of magnetic field. The experimental implementation feasibility and its possible outcome are addressed. We believe the experimental realization will allow to increase precision of the physical quantities involved, in particular the upper state atomic levels energy.

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Section: Introductionmentioning

confidence: 99%

Transition cancellations of $^{87}$Rb and $^{85}$Rb atoms in a magnetic field setting new standards

Aleksanyan,

Momier,

Gazazyan

et al. 2020

Preprint

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Joint spatial weak measurement with higher-order Laguerre-Gaussian point states

Zhang¹,

Liang

Zheng³

et al. 2022

Opt. Express

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Here, joint spatial weak measurements with higher-order Laguerre-Gaussian (LG) point states are investigated experimentally. From the intensity patterns of the final LG point states, two dimensional position operators 〈X〉 and 〈Y〉 as well as high-order position operators 〈XY〉, 〈X2 − Y2〉, 〈X3〉, and 〈Y3〉 are extracted simultaneously, from which both the complex weak values and joint weak values of two non-commuting observables can be obtained. The enhancement of joint weak values by the postselection state are analyzed. The simple relationship between the expectation values of position operators and the azimuthal and radial indexes of LG modes allows us to identify the mode indexes directly. A simple and robust scheme based on an optical window is demonstrated to monitor the LG mode indexes. These findings deepen the understanding of the weak measurement and provide an alternate and effective method for LG mode index monitoring.

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Space division multiplexing metasurface for single-beam atomic magnetometers

Liu,

Tang,

et al. 2024

Opt. Express

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A significant drive has emerged to miniaturize and integrate atomic magnetometers for various ultra-high precision quantum sensing applications, extending from laboratory research to industrial use. We introduce a novel configuration of a single-beam atomic magnetometer based on space division multiplexing (SDM), offering a promising approach to this field of research. This design utilizes a custom-designed metasurface to manipulate two generated modes, enabling the implementation of a pump-probe configuration within a single-beam atomic magnetometer. This approach achieves higher spatial resolution and reduces the system's volume. The metasurface centrally generates circularly polarized light carrying spin angular momentum, while linearly polarized light is emitted from the outer areas. This design not only enhances the miniaturization of chip-scale atomic magnetometers but also opens new avenues for exploring interactions between hot atomic spin ensembles and vector beams.

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Ultra-sensitive single-beam atom-optical magnetometer using weak measurement method

Cited by 3 publications

References 33 publications

Transition cancellations of $^{87}$Rb and $^{85}$Rb atoms in a magnetic field setting new standards

Transition cancellations of $^{87}$Rb and $^{85}$Rb atoms in a magnetic field setting new standards

Joint spatial weak measurement with higher-order Laguerre-Gaussian point states

Space division multiplexing metasurface for single-beam atomic magnetometers

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