Bridging high and low energies in search of quantum gravity - 2025 Cost Action CA23130 First Annual Conference

Session

WG4 Low-energy high-precision experiment

9 Jul 2025, 14:00

Amphithéâtre Charpak (LPNHE)

93. Exploring gravity with micro-mechanical oscillators

Francesco Marin

09/07/2025, 14:00

Invited oral contribution (hot topic)

The status of three optomechanical experiments is presented. The first one sets upper bounds on possible deformations of the standard commutator between position and momentum. The second one aims to detect the gravitational force between two silicon micro-oscillators in a high-purity state. The third one explores the motion of levitated nanospheres in the quantum regime.

1. Testing Quantum Mechanics Underground: Collapse models and Pauli Exclusion Principle

Catalina Curceanu

09/07/2025, 14:40

Oral contribution

We are experimentally investigating possible departures from the standard quantum mechanics’ predictions at the Gran Sasso underground laboratory in Italy.
In particular, with radiation detectors we are searching for signals predicted by the collapse models (spontaneous emission of radiation) which were proposed to solve the “measurement problem” in quantum physics and signals coming from a...

51. Superconducting electro-mechanics to explore the effects of general relativity in massive superpositions

Gary Steele (TU Delft)

09/07/2025, 15:00

Oral contribution

The combination of time dilation in general relativity with the possibility in quantum mechanics for masses to exist in a quantum superposition of being in two places at the same time leads to a prediction of quantum uncertainty in the definition of local time, something incompatible with our understanding of quantum mechanics. With no theoretical solution to the fundamental conflict,...