Conveners
Quantum gravity phenomenology: Tuesday block 1
- Giovanni Amelino-Camelia (Università Federico II di Napoli)
- Giulia Gubitosi (University of Naples Federico II)
Quantum gravity phenomenology: Tuesday block 2
- Giovanni Amelino-Camelia (Università Federico II di Napoli)
- Giulia Gubitosi (University of Naples Federico II)
Description
This session will be devoted to discussion of phenomenological models aimed at probing and possibly leading to detection of various phenomena of quantum gravity origin. Such models are particularly timely now, at the down of the multi-messenger astronomy, which give us an access to new observations, possibly capable of detecting Planck-scale effects. The aim of the session will be to present recent developments in both theoretical investigations and current and near-future observational opportunities.
I observe that some of the key challenges faced by quantum-gravity research, and particularly by quantum-gravity phenomenology, can be traced back to grey area of our understanding of the interface between quantum mechanics and special relativity
It is a longstanding conjecture that spacetime is emergent from an unknown substructure on an ultramicroscopic scale. While there are many competing models of this sort, a generic question is whether the existence of a fundamental length has any observable consequences. To investigate this, we have examined various quantum field effects within the framework of one such model: Doubly Special...
We investigate the implications of decoherence induced by quantum spacetime properties on neutrino oscillation phenomena. We develop a general formalism where the evolution of neutrinos is governed by a Lindblad-type equation and we compute the oscillation damping factor for various models that have been proposed in the literature. Furthermore, we discuss the sensitivity to these effects of...
Since the seminal work of Jacobson, it has been known that the equations governing gravitational dynamics can be reconstructed from thermodynamics of local causal horizon. Remarkably, it is even possible to recover low energy quantum phenomenological corrections to gravitational dynamics from thermodynamics. In vacuum, the only possible such corrections are quadratic in Weyl tensor. These...
In general relativity, the use of conformal transformation is ubiquitous and leads to two different frames of reference, known as the Jordan and the Einstein frames. Typically, the transformation from the Jordan frame to the Einstein frame involves introducing an additional scalar degree of freedom, often already present in the theory. We will show that at the quantum level, owing to this...
I review the phenomenology of Planck-scale effects influencing the propagation of high-energy particles from astrophysical sources.
I discuss the interplay between Planck-scale effects and the universe expansion, and present possible methods to constrain such effects using observations.
We investigate the massless scalar field perturbations, including the quasinormal modes spectrum and the ringdown waveform, of regular black hole spacetimes derived within the Asymptotic Safety program. In particular, we discuss the stability of a new class of AS black holes recently derived dynamically within a non-singular model of collapse and explore the possibility of detecting signatures...
In this presentation, we discuss a treatment of Casimir-Polder gravitational fluctuation forces based on a classical general relativistic gravitational field framework. In analogy with the acoustic Casimir effect, we analyze the interaction between high density neutron star surfaces within a bath of classical gravitational waves. We extend a previously published treatment of the interaction...
It is a fact that the universe lives on a gravitational wave background (GWB). In this talk we start from this hypothesis. Due to the GWB, space-time is fluctuating in such a way that it locally resembles a lake with small waves and therefore quantum particles cannot follow geodesic trajectories, but rather follow stochastic trajectories. In the present talk, we begin by adding a stochastic...
We have shown earlier that quantum gravity can be described in terms of wave functions on the bundle of spin connection coefficients over spacetime. The corresponding precanonical quantization procedure introduces, for dimensional reasons, an ultra-violet parameter $\varkappa$ of dimension of the inverse 3-volume element. For scalar and Yang-Mills fields, the standard Schroedinger functional...
