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Atom-Chip Fountain Gravimeter
S Abend1, M Gebbe2, M Gersemann1
1Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany.
Physical Review Letters
|November 26, 2016
Summary
We developed a quantum gravimeter using Bose-Einstein condensates (BECs) for high-accuracy gravity measurements. This miniaturized device achieves sub-microgal accuracies, enabling precise measurements in a compact form factor.
Area of Science:
- Quantum physics
- Atomic physics
- Gravimetry
Background:
- Atom chips enable precise control over ultracold atoms.
- Bose-Einstein condensates (BECs) offer enhanced sensitivity for quantum measurements.
- Miniaturized gravimeters are crucial for field applications.
Purpose of the Study:
- To demonstrate a novel quantum gravimeter.
- To achieve high-accuracy gravity measurements using BECs.
- To develop a miniaturized and robust gravimetric device.
Main Methods:
- Utilizing an atom chip for BEC generation, collimation, and manipulation.
- Implementing Bloch oscillations and double Bragg diffraction for an innovative launch mechanism.
- Constructing a high-contrast BEC interferometer for precise measurements.
Main Results:
- Achieved tens of milliseconds of BEC free fall within a one centimeter cube.
- Demonstrated a high-contrast BEC interferometer.
- Paved the way for sub-microgal accuracy measurements.
Conclusions:
- The developed quantum gravimeter combines atom chip technology with an innovative launch mechanism.
- The device enables precise gravity measurements with sub-microgal accuracies.
- This technology holds promise for miniaturized, robust gravimetric devices.
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