15th annual conference on Relativistic Quantum Information (North)

Session

Tuesday Plenary Session

24 Jun 2025, 09:15

Accademia Pontaniana

184. Table-top tests of quantum gravity: to entanglement and beyond

Richard Howl (University of London)

24/06/2025, 09:15

Talk

The interplay between quantum mechanics and general relativity is one of the most profound open problems in fundamental physics. After decades of purely theoretical investigations, recent experimental advances turned the prospect of a phenomenological approach into a realistic possibility. On one hand, searches for quantum gravity effects in astrophysical signals constitute nowadays an...

185. Waiting around for Unruh

Jorma Louko (University of Nottingham)

24/06/2025, 09:55

Talk

In the ongoing work towards observing the circular motion Unruh effect in (2+1)-dimensional analogue spacetime systems, one challenge is that the effective temperature experienced by a local detector is much smaller than the linear acceleration prediction when the detector's energy gap is small and the interaction time is long. We show that an effective temperature of the order of the linear...

186. Stimulated emission or absorption of gravitons by light

Ralf Schützhold (TU, Dresden)

24/06/2025, 10:25

Talk

We study the exchange of energy between gravitational and electromagnetic waves in a Sagnac type geometry, in analogy to an ``optical Weber bar.'' In the presence of a gravitational wave (such as the ones measured by LIGO), we find that it should be possible to observe signatures of stimulated emission or absorption of gravitons with present day technology. Apart from marking the transition...

168. Testing quantum gravity

Daniel Carney (LBNL, Berkeley)

24/06/2025, 11:30

Talk

I will give a brief overview of proposals to test the quantization of the gravitational field, particularly in terrestrial experiments. This will include entanglement experiments and "single-graviton detection". As a particular example of a non-standard gravity model that could be tested, I will discuss a recent phenomenological model of "entropic gravity" and its experimental signatures.

188. Atom interferometry applied to gravitational measurements

Gabriele Rosi (LENS, Florence)

24/06/2025, 12:10

Talk

"Atom interferometry has emerged as a powerful tool to probe gravitational physics with unprecedented precision. In this talk, I will present two distinct experimental efforts that, while targeting different fundamental questions, share this common methodology.
The first experiment, MEGANTE, addresses a long-standing challenge in metrology: the precise determination of the gravitational...

189. BridgeQG: Bridging high and low energies in search of quantum gravity

Giulia Gubitosi (University of Naples)

24/06/2025, 12:50

Talk

In this talk, I will give an overview of the state of the art and key open questions of this research programme and describe the related activities of the COST Action BridgeQG (Bridging high and low energies in search of quantum gravity).