Researchers Models Deformed Polaron-Molecule Hamiltonian For Quantum-Gravity Phenomenology

Ezequiel Valero and colleagues at the University of Valencia demonstrate that many-body observables exhibit significant sensitivity to ultraviolet (UV) deformations originating from generalised-uncertainty-principle and modified-dispersion-relation theories, even at accessible energy scales. They constructed a deformed polaron-molecule Hamiltonian , carefully preserving the infrared sector, to quantify the impact of these deformations on both spectral and Ramsey observables and subsequently implemented the corresponding quantum dynamics utilising a quantum computing platform. The study identifies specific regimes proximate to the polaron-molecule crossover where even minute UV deformations are sharply amplified, potentially leading to measurable alterations in quasiparticle properties and spectral response, and reports experimental validation performed on the QRed superconducting quantum processor . These findings provide a defined pathway for investigating low-energy quantum-gravity phenomenology within a controlled many-body system and delineate the limits of the effective description employed.