Lapponi, Alessio (2025) Quantum Communication in Cosmological Settings: Theoretical and Phenomenological Implications. [Tesi di dottorato]

Documento PDF Alessio_Lapponi_Thesis_Updated.pdf Download (3MB)

Abstract

The application of gravitational physics to quantum information theory offers a promising framework for addressing some of the most profound open questions in modern science. This thesis investigates how gravity influences quantum systems through the lens of quantum communication protocols, and how these effects can, in turn, be exploited to face open challenges in cosmology and general relativity. By using both a semiclassical and a quantum theory of gravity, two communication protocols are developed and analyzed in a variety of relativistic and cosmological settings. The first involves the transmission of quantum and classical information via well-defined single-mode bosonic channels, where gravitational curvature and expansion act as sources of signal degradation. The second protocol employs localized quantum detectors- effectively, quantum antennas- revealing how gravitational and cosmological effects can enhance, rather than hinder, information exchange. These studies demonstrate that quantum communication provides a concrete operational tool to investigate fundamental gravitational phenomena such as cosmological particle production, curvature coupling, and even self-gravitational decoherence. Beside that, the results suggest that information loss and signal fidelity can serve as sensitive indicators of spacetime properties, giving the opportunity to experimental test gravitational features via quantum information protocols.

Downloads

Actions (login required)

Modifica documento