Position fixing with cold atom gravity gradiometers

Wright, Michael J.; Riou, Isabelle; Maddox, Stephen; Maskell, Simon; Ralph, Jason F.

doi:10.1116/5.0095677

Cited by 5 publications

(3 citation statements)

References 44 publications

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“…CAGs for use in space are currently under development [106][107][108][109][110] for several applications such as global gravity field mapping and fundamental physics [26]. For example, in fundamental physics CAGs are being developed with the aim to test the Weak Equivalence Principle [111,112].…”

Section: Space Based Systemsmentioning

confidence: 99%

“…The precision and stability of CAGs are also enhanced by the use of atom standards for reference enabling low drift. These benefits have sparked interest in using portable CAGs for various applications, such as civil engineering [19], atmospheric drag measurements [20], carbon capture and storage monitoring [21], climate change monitoring [22,23], navigation [18,[23][24][25][26][27][28], geohazard monitoring [29], and military applications [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

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Advances in Portable Atom Interferometry-Based Gravity Sensing

Vovrosh,

Dragomir,

Stray

et al. 2023

Sensors

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Gravity sensing is a valuable technique used for several applications, including fundamental physics, civil engineering, metrology, geology, and resource exploration. While classical gravimeters have proven useful, they face limitations, such as mechanical wear on the test masses, resulting in drift, and limited measurement speeds, hindering their use for long-term monitoring, as well as the need to average out microseismic vibrations, limiting their speed of data acquisition. Emerging sensors based on atom interferometry for gravity measurements could offer promising solutions to these limitations, and are currently advancing towards portable devices for real-world applications. This article provides a brief state-of-the-art review of portable atom interferometry-based quantum sensors and provides a perspective on routes towards improved sensors.

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Section: Space Based Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Advances in Portable Atom Interferometry-Based Gravity Sensing

Vovrosh,

Dragomir,

Stray

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…Cold-atom interferometers achieve unprecedented sensitivity and stability as laboratory-based sensors of accelerations 2,3 and rotations. [4][5][6] Replicating this performance with compact field-based devices will enable new capabilities in navigation, [7][8][9][10] civil engineering, 11 mineral exploration and recovery, 12 and Earth observation. 13 However, adapting such sensors for field-based operation raises significant challenges.…”

Section: Introductionmentioning

confidence: 99%

Realizing software-defined quantum sensing: experimental demonstration of software-ruggedized atom interferometry for mobile quantum inertial sensing

Saywell¹,

Carey²,

Light³

et al. 2023

Quantum Sensing, Imaging, and Precision Metrology

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Quantum sensors based on cold atoms have enormous potential to unlock new capabilities in GPS-denied navigation, civil engineering, intelligence, and Earth observation. But operating these devices in realistic environments is currently extremely challenging, and for the most part the advantages of choosing a quantum sensor over a conventional alternative are lost in the transition from laboratory to noisy field-based environments. In this work, we demonstrate for the first time in hardware that tailored light pulses, designed and implemented in software using robust control techniques, can substantially mitigate some of the most nefarious effects in a Bragg atom interferometer. We show experimentally that embedding robust control into sensor operation can improve the signal-to-noise ratio of a state-of-the-art Bragg-pulse cold-atom interferometric sensor by a factor of 4× under ideal conditions. In the presence of laser-intensity noise that varies up to 20% from shot-to-shot, commensurate with common platform vibrations, we show experimentally that using the same robust control solutions preserves fringe visibility with minimal degradation while the utility of the primitive Gaussian pulses collapses, delivering an at least 8× improvement in phase-estimation uncertainty compared with primitive pulse schemes. Across all observations, robust control delivers better performance in a noisy environment than the native hardware performance with primitive pulses under approximately ideal conditions. Finally, building on this demonstration we present a validated theoretical concept to extend this performance improvement to compact devices using concatenated sequences of robust pulses designed to enhance the sensor's scale factor. Time-domain simulations reveal up to 10× performance enhancement in the presence of realistic atomic-cloud effects at 102ℏk momentum separation. These results show for the first time that software-defined quantum sensor operation can deliver useful performance in environmental regimes where primitive operation is impossible, providing a pathway to augment the performance of current and next generation portable cold-atom inertial sensors in real fielded settings.

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Long-range interacting Stark many-body probes with super-Heisenberg precision

Yousefjani,

He 何,

Bayat

2023

Chinese Phys. B

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In contrast to interferometry-based quantum sensing, where interparticle interaction is detrimental, quantum many-body probes exploit such interactions to achieve quantum-enhanced sensitivity. In most of the studied quantum many-body probes, the interaction is considered to be short-ranged. Here, we investigate the impact of long-range interaction at various filling factors on the performance of Stark quantum probes for measuring a small gradient field. These probes harness the ground state Stark localization phase transition which happens at an infinitesimal gradient field as the system size increases. Our results show that while superHeisenberg precision is always achievable in all ranges of interaction, the longrange interacting Stark probe reveals two distinct behaviors. First, by algebraically increasing the range of interaction, the localization power enhances and thus the sensitivity of the probe decreases. Second, as the interaction range becomes close to a fully connected graph its effective localization power disappears and thus the sensitivity of the probe starts to enhance again. The super-Heisenberg precision is achievable throughout the extended phase until the transition point and remains valid even when the state preparation time is incorporated in the resource analysis. As the probe enters the localized phase, the sensitivity decreases and its performance becomes size-independent, following a universal behavior. In addition, our analysis shows that lower filling factors lead to better precision for measuring weak gradient fields.

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Position fixing with cold atom gravity gradiometers

Cited by 5 publications

References 44 publications

Advances in Portable Atom Interferometry-Based Gravity Sensing

Advances in Portable Atom Interferometry-Based Gravity Sensing

Realizing software-defined quantum sensing: experimental demonstration of software-ruggedized atom interferometry for mobile quantum inertial sensing

Long-range interacting Stark many-body probes with super-Heisenberg precision

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