Attention !!! Changement d’horaire !!! qBounce : Gravity Resonance Spectroscopy to search for Dark Energy and Dark Matter candidates

Orateur : Gunther CRONENBERG (ATI, TU Wien)

We present observations of transitions between quantum states of gravitationally bound neutrons using a three-part Rabi resonance spectroscopy setup. In our previous experiment ultra-cold neutrons were trapped in the gravitational field. Quantum interferences between different states have been observed by inducing transitions by mechanical vibration. The latest improvement, omitting the upper confining mirror, allows the shift from a frequency reference to a frequency standard, where the transition frequency depends solely on the neutrons mass, Plancks constant and Earth’s gravity. This tests Newton’s Inverse Square Low of Gravity at the micrometer regime which is sensitive to hypothetical Fifth Forces, particles beyond the Standard Model, and potential large extra dimensions of submillimetre size of space-time.

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