Observing the effect of wave-front aberrations in an atom interferometer by modulating the diameter of Raman beams

Zhou, Min-Kang; Luo, Qin; Chen, Lele; Duan, Xuanchu; Hu, Zhong-Kun

doi:10.1103/physreva.93.043610

Cited by 34 publications

(31 citation statements)

References 32 publications

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“…Finally, this effect is the most important contribution in the accuracy budget of the most accurate gravimeters, with contributions, up to recently, of order of 3 − 4 × 10 −8 m.s −2 . To evaluate this effect, one can investigate its dependence when increasing the atom temperature 57 , or when selecting the trajectories, either by truncating the detection area 93 or the size of the Raman laser beam 94 . But, none of these methods allowed to evaluate the effect with a low enough uncertainty to make the accuracy of the atomic sensor better than the announced one of the best classical instrument, the FG5 (Ref.…”

Section: Accuracy Limitsmentioning

confidence: 99%

High-accuracy inertial measurements with cold-atom sensors

Geiger

Landragin

Merlet

et al. 2020

AVS Quantum Science

136

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The research on cold-atom interferometers gathers a large community of about 50 groups worldwide both in the academic and now in the industrial sectors. The interest in this sub-field of quantum sensing and metrology lies in the large panel of possible applications of cold-atom sensors for measuring inertial and gravitational signals with a high level of stability and accuracy. This review presents the evolution of the field over the last 30 years and focuses on the acceleration of the research effort in the last 10 years. The article describes the physics principle of cold-atom gravito-inertial sensors as well as the main parts of hardware and the expertise required when starting the design of such sensors. It then reviews the progress in the development of instruments measuring gravitational and inertial signals, with a highlight on the limitations to the performances of the sensors, on their applications, and on the latest directions of research.

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Section: Accuracy Limitsmentioning

confidence: 99%

High-accuracy inertial measurements with cold-atom sensors

Geiger

Landragin

Merlet

et al. 2020

AVS Quantum Science

136

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“…In the context of realistic precision atom interferometric setups, it is necessary to include Rabi frequencies �(x, t) and wave vectors k(x, t) which are space and time-dependent. This allows one to account for important experimental ingredients such as the Doppler detuning or the beam shapes including wavefront curvatures [13][14][15] and Gouy phases [16][17][18][19] . Moreover, this generalisation allows one to effortlessly include the superposition of more than two laser fields interacting with the atoms as in the promising case of double Bragg diffraction [20][21][22] , and to model complex atom-light interaction processes where spurious light reflections or other experimental imperfections are present 23 .…”

Section: Theoretical Modelmentioning

confidence: 99%

Universal atom interferometer simulation of elastic scattering processes

Fitzek

Siemß

Seckmeyer

et al. 2020

Sci Rep

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In this article, we introduce a universal simulation framework covering all regimes of matter-wave light-pulse elastic scattering. Applied to atom interferometry as a study case, this simulator solves the atom-light diffraction problem in the elastic case, i.e., when the internal state of the atoms remains unchanged. Taking this perspective, the light-pulse beam splitting is interpreted as a space and time-dependent external potential. In a shift from the usual approach based on a system of momentum-space ordinary differential equations, our position-space treatment is flexible and scales favourably for realistic cases where the light fields have an arbitrary complex spatial behaviour rather than being mere plane waves. Moreover, the solver architecture we developed is effortlessly extended to the problem class of trapped and interacting geometries, which has no simple formulation in the usual framework of momentum-space ordinary differential equations. We check the validity of our model by revisiting several case studies relevant to the precision atom interferometry community. We retrieve analytical solutions when they exist and extend the analysis to more complex parameter ranges in a cross-regime fashion. The flexibility of the approach, the insight it gives, its numerical scalability and accuracy make it an exquisite tool to design, understand and quantitatively analyse metrology-oriented matter-wave interferometry experiments.

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“…Wavefront aberrations in optical fields can limit the performance of state of the art experiments in gravitational wave interferometry (GW) [1][2][3], quantum optics [4], vortex beam generation [5], and atom interferometers [6][7][8][9]. Aberrations can reduce the sensitivity of an experiment through lost optical power or increasing the coupling of noise sources to signal readouts.…”

Section: Introductionmentioning

confidence: 99%

Differential wavefront sensing and control using radio-frequency optical demodulation

Brown,

Cao,

Ciobanu

et al. 2021

Preprint

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Differential wavefront sensing is an essential technique for optimising the performance of many precision interferometric experiments. Perhaps the most extensive application of this is for alignment sensing using radio-frequency beats measured with quadrant photodiodes. Here we present a new technique that uses optical demodulation to measure such optical beats at significantly higher resolutions using commercial laboratory equipment. We experimentally demonstrate that the images captured can be digitally processed to generate wavefront error signals and use these in a closed loop control system for correct wavefront errors for alignment and mode-matching a beam into an optical cavity to 99.9%. This experiment paves the way for the correction of even higher order errors when paired with higher order wavefront actuators. Such a sensing scheme could find use in optimizing complex interferometers consisting of coupled cavities, such as those found in gravitational wave detectors, or simply just for sensing higher order wavefront errors in heterodyne interferometric table-top experiments.

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Observing the effect of wave-front aberrations in an atom interferometer by modulating the diameter of Raman beams

Cited by 34 publications

References 32 publications

High-accuracy inertial measurements with cold-atom sensors

High-accuracy inertial measurements with cold-atom sensors

Universal atom interferometer simulation of elastic scattering processes

Differential wavefront sensing and control using radio-frequency optical demodulation

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