Single-Species Atomic Comagnetometer Based on 
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Wang, Zhiguo; Peng, Xiang; Zhang, Rui; Luo, Hui; Li, Jiajia; Xiong, Zhiqiang; Wang, Shanshan; Guo, Hong

doi:10.1103/physrevlett.124.193002

Cited by 41 publications

(21 citation statements)

References 37 publications

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“…This B L field is large enough to bring about the NLZ effect, inducing splitting and asymmetry of the magnetic resonance [41]. Moreover, with low Ω L , the magnetic resonance generated from the residual atoms in the F = 1 state disturbs the main magnetic resonance from the F = 2 state atoms due to the tiny difference in the gyromagnetic ratios of the F = 1 and F = 2 states [42]. The frequency difference between these two magnetic resonances increases with B L .…”

Section: Methodsmentioning

confidence: 99%

Quantum-limit-breaking Magnetic Gradiometer with Entangled Light

Bao

Guo

et al. 2022

Preprint

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In the last few decades, the atomic magnetometry [1–7] has experienced remarkable development and reached to an outstanding sensitivity. This exciting technology is finding applications in various of fields [8–18]. The last two obstacles to further improve the sensitivity of magnetometry are quantum fluctuations and ambient magnetic field. For magnetometry based on optical readout of atomic ensemble’s spin precession, the fundamental limitation of sensitivity is restricted by spin projection noise (SPN) and photon shot noise (PSN). Meanwhile, in practical applications, ambient magnetic field noise which is regarded as a common-mode magnetic-field (CMM) noise is also limiting the sensitivity. Several techniques for reducing PSN [19–25], SPN [26, 27], and CMM noise [7, 28–31] have been proposed, respectively. To achieve the best sensitivity, it is essential to find an efficacious way to eliminate the noises from different sources, simultaneously. For this purpose, here we demonstrate a sub-shot-noise magnetic gradiometer utilizing entangled optical detection with quantum-correlated twin beams. This leads to the simultaneous suppression of PSN and CMM noise. The quantum enhancement spans a frequency range from 7 Hz to 6 MHz with maximum squeezing of 5.5 dB below the standard quantum limit (SQL). The sensitivity of gradient magnetic field reaches 18 fT/cm√Hz at 20 Hz with these sophisticated techniques. Our study opens up new possibilities to use quantum-enhanced technology in developing sensitive magnetometry for practical applications with noisy and physically demanding environments.

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Section: Methodsmentioning

confidence: 99%

Quantum-limit-breaking Magnetic Gradiometer with Entangled Light

Bao

Guo

et al. 2022

Preprint

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“…Ω is the rotation rate. Comagnetometry vari- ants include utilizing different atomic species [93] and different isotopes [92,94,95] and hyperfine levels of the same atomic species [96,97]. The latter implementation is particularly robust to systematic errors due to magnetic field gradients.…”

Section: Comagnetometrymentioning

confidence: 99%

Sensitive magnetometry in challenging environments

Fu¹,

Iwata²,

Wickenbrock³

et al. 2020

Preprint

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State-of-the-art magnetic field measurements performed in shielded environments with carefully controlled conditions rarely reflect the realities of those applications envisioned in the introductions of peer-reviewed publications. Nevertheless, significant advances in magnetometer sensitivity have been accompanied by serious attempts to bring these magnetometers into the challenging working environments in which they are often required. In this review, we cover the ways in which various magnetometer technologies have been adapted for use in challenging environments.

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“…But to detect the non-magnetic spin-dependent interactions, the impact of magnetic field variation should be eliminated, and therefore the atomic comagnetometer scheme was presented [2,3,4]. By detecting the overlap of spin precession frequencies in the same magnetic environment, comagnetometers can suppress the impact of magnetic field variation in common mode, which may benefit the measurement of non-magnetic spin-dependent interactions in fundamental physics [5], such as tests of CPT and Lorentz invariance [6,7,8], measurement of permanent electric dipole moments (EDMs) [9,10,11], and searches for exotic spin-gravity interactions [12,13,14,15,16].…”

Section: Introductionmentioning

confidence: 99%

“…A similar 87 Rb atomic comagnetometer has been implemented by our group [16]. As is shown in Table1, Cs atoms are preferred for 3 reasons:…”

Section: Introductionmentioning

confidence: 99%

“…In our system, the influ-ence of the pump light, such as light shift and cross talk between hyperfine Zeeman sublevels, is eradicated because the pump light is turned off when detecting the optical free induction decay (FID) signal. Additionally, compared to other single-species comagnetometers which spend a long time (> 10 s) in scanning to find the resonance frequency [16,28], our system spends only 2 s to get the frequency information, and thus the magnetic field noise in common mode can be effectively suppressed.…”

Section: Introductionmentioning

confidence: 99%

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All-Optical Single-Species Cesium Atomic Comagnetometer with Optical Free Induction Decay Detection

Yang,

Wu,

Chen

et al. 2020

Preprint

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Atomic comagnetometers, which measure the spin precession frequencies of overlapped species simultaneously, are widely used to search for exotic spin-dependent interactions. The dominant systematic errors are from the magnetic field gradients and laser light field. Here we propose and implement an all-optical single-species Cs atomic comagnetometer based on the optical free induction decay (FID) signal. The two magnetic fielddependent spin-precession frequencies are from Cs atoms in hyperfine levels F g = 3 & 4 within the same atomic ensemble. We experimentally show

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Single-Species Atomic Comagnetometer Based on Rb87 Atoms

Cited by 41 publications

References 37 publications

Quantum-limit-breaking Magnetic Gradiometer with Entangled Light

Quantum-limit-breaking Magnetic Gradiometer with Entangled Light

Sensitive magnetometry in challenging environments

All-Optical Single-Species Cesium Atomic Comagnetometer with Optical Free Induction Decay Detection

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