A compact differential gravimeter at the quantum projection noise limit

Abstract

Atom interferometry offers new perspectives for geophysics and inertial sensing. We present the industrial prototype of a new type of quantum-based instrument: a compact, transportable, differential quantum gravimeter capable of measuring simultaneously the absolute values of both gravitational acceleration, $g$, and its vertical gradient, ${\Gamma }_{zz}$. While the sensitivity to g is competitive with the best industrial gravimeters, the sensitivity on ${\Gamma }_{zz}$ reaches the limit set by quantum projection noise-leading to an unprecedented long-term stability of 0.1 E ($1E=1\times 10^{-9}{s}^{-2}$). This unique, dual-purpose instrument, paves the way for new applications in geophysics, civil engineering, and gravity-aided navigation, where accurate mapping of the gravitational field plays an important role.

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Cited by in corpus (13)

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• Measuring gravity by holding atoms
• A practical guide to Terahertz imaging using thermal atomic vapour
• Quantum-enhanced differential atom interferometers and clocks with spin-squeezing swapping
• Deep Laser Cooling of Thulium Atoms to Sub-$\mu$K Temperatures in Magneto-Optical Trap
• Heisenberg-Limited Spin-Mechanical Gravimetry
• Integration of a high-fidelity model of quantum sensors with a map-matching filter for quantum-enhanced navigation
• Influence of optical aberrations on the accuracy of an atomic gravimeter
• Single-Beam Magneto-Optical Trap in Back-to-Back Pyramidal and Conical Mirrors
• Dual Open Atom Interferometry for Compact and Mobile Quantum Sensing
• An atomic Fabry-Perot interferometer-based acceleration sensor for microgravity environments
• Deterministic nuclear spin squeezing and squeezing by continuous measurement using vector and tensor light shifts
• Tensor gravity gradiometry with a single-axis atom gradiometer