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Quantum gravity sensor opens window into world beneath our feet
- andreareina 5y agohttps://archive.fo/jLeIX https://archive.fo/jLeIX
- andreareina 5y agoN.B. this is a device that uses quantum effects to measure the strength of gravity, not anything to do with a quantum theory of gravity. Still quite an achievement from what I understand. > The sensor uses a quantum technique called atom interferometry. Ultra-cold rubidium atoms, falling under the influence of gravity, are illuminated with laser beams. The resulting interference patterns depend on the speed with which they are falling — and indicate with great precision the strength and gradient of the local gravitational field, which is influenced in turn by what lies beneath the ground.