Precisely mapping the magnetic field gradient in vacuum with an atom interferometer

Zhou, Min-Kang; Hu, Zhong-Kun; Duan, Xuanchu; Sun, Bu-Liang; Zhao, Jinbo; Luo, Jun

doi:10.1103/physreva.82.061602

Cited by 59 publications

(40 citation statements)

References 25 publications

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“…Although others have proposed and shown magnetic sensitivity using atom interferometers [4,[8][9][10][11][12], here, we present a bandwidth-tunable magnetometer which is capable of frequency-discrimination of out-of-band magnetic background noise. In a magnetically shielded room, background magnetic fields can be filtered below 1 fT/Hz −1/2 [13,14].…”

Section: Introductionmentioning

confidence: 98%

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A frequency selective atom interferometer magnetometer

Braje

DeSavage²,

Adler

et al. 2014

Journal of Modern Optics

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In this article, we discuss the magnetic-field frequency selectivity of a time-domain interferometer based on the number and timing of intermediate π pulses. We theoretically show that by adjusting the number of π pulses and the π -pulse timing, we can control the frequency selectivity of the interferometer to time varying and DC magnetic fields. We present experimental data demonstrating increased coherence time due to bandwidth filtering with the inclusion of a π pulse between the initial and final π/2 pulses, which mitigates sensitivity to low frequency magnetic fields.

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Section: Introductionmentioning

confidence: 98%

“…(a) Plot of probability amplitude of population in state |2 versus two-photon detuning for a Ramsey pulse sequence in Equation(9) for Ω = 2π (20 kHz), T π/2 = 10 µs, T = 50 µs. (b) Plot of a spin echo pulse sequence in Equation (10) Ω = 2π (20 kHz), T π/2 = 10 µs, T a = T b = 50 µs, δ = δ .…”

mentioning

confidence: 99%

A frequency selective atom interferometer magnetometer

Braje

DeSavage²,

Adler

et al. 2014

Journal of Modern Optics

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“…A variant of the proposed gradient interferometer was recently demonstrated [8]. Since this device obviously depends on the use of magnetically sensitive transitions, it becomes important to understand the role of all the magnetic states in this process for magnetic fields that have arbitrary orientation and strength.…”

Section: Introductionmentioning

confidence: 99%

Raman resonances in arbitrary magnetic fields

DeSavage¹,

Gordon²,

Clifton

et al. 2011

Journal of Modern Optics

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We study the general problem of Raman resonances in arbitrary magnetic fields for realistic alkali atoms. We first present the details of a model that includes all magnetic sub-levels and their appropriate coupling strengths to two laser fields. The numerical implementation of this model and some of the results are also presented. Our experimental arrangement is described and preliminary measurements are presented.

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“…(ii) The atom interferometry method. The atom interferometry gravimeter was built in 2006 and achieved a high sensitivity [16][17][18][19]. (iii) The angular acceleration feedback method.…”

Section: Introductionmentioning

confidence: 99%

Preliminary determination of Newtonian gravitational constant with angular acceleration feedback method

Xue

Quan

Yang

et al. 2014

Phil. Trans. R. Soc. A.

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This paper describes the preliminary measurement of the Newtonian gravitational constant G with the angular acceleration feedback method at HUST. The apparatus has been built, and preliminary measurement performed, to test all aspects of the experimental design, particularly the feedback function, which was recently discussed in detail by Quan et al . The experimental results show that the residual twist angle of the torsion pendulum at the signal frequency introduces 0.4 ppm to the value of G . The relative uncertainty of the angular acceleration of the turntable is approximately 100 ppm, which is mainly limited by the stability of the apparatus. Therefore, the experiment has been modified with three features: (i) the height of the apparatus is reduced almost by half, (ii) the aluminium shelves were replaced with shelves made from ultra-low expansion material and (iii) a perfect compensation of the laboratory-fixed gravitational background will be carried out. With these improvements, the angular acceleration is expected to be determined with an uncertainty of better than 10 ppm, and a reliable value of G with 20 ppm or below will be obtained in the near future.

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Precisely mapping the magnetic field gradient in vacuum with an atom interferometer

Cited by 59 publications

References 25 publications

A frequency selective atom interferometer magnetometer

A frequency selective atom interferometer magnetometer

Raman resonances in arbitrary magnetic fields

Preliminary determination of Newtonian gravitational constant with angular acceleration feedback method

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