506 citations · 2.1k across the 75 of their papers we have counts for
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Primordial perturbations in a rainbow universe with running Newton constant
Francesco Brighenti, Giulia Gubitosi, Joao Magueijo
We compute the spectral index of primordial perturbations in a rainbow universe. We allow the Newton constant to run at (super-)Planckian energies and we consider both vacuum a…
Planck-scale-modified dispersion relations in homogeneous and isotropic spacetimes
Leonardo Barcaroli, Lukas K. Brunkhorst, Giulia Gubitosi +2
The covariant understanding of dispersion relations as level sets of Hamilton functions on phase space enables us to derive the most general dispersion relation compatible with hom…
Correlation between opposite-helicity gravitons: Imprints on gravity-wave and microwave backgrounds
Giulia Gubitosi, Joao Magueijo
We examine some of the roots of parity violation for gravitons and uncover a closely related new effect: correlations between right and left handed gravitons. Such correlators have…
Thermal dimension of quantum spacetime
Giovanni Amelino-Camelia, Francesco Brighenti, Giulia Gubitosi +1
Recent results suggest that a crucial crossroad for quantum gravity is the characterization of the effective dimension of spacetime at short distances, where quantum properties of…