4 papers
Perturbative unitarity of fractional field theories and gravity
Gianluca Calcagni, Fabio Briscese
Motivated by quantum gravity on spacetimes with multi-scale geometry, we analyze quantum field theories with a self-adjoint fractional power of the d'Alem\-bert\-…
Fractal universe and quantum gravity made simple
Fabio Briscese, Gianluca Calcagni
Quantum field theory (QFT) on fractal spacetimes is a program aiming at quantizing the gravitational interaction consistently at all energy scales thanks to an intrinsically or dyn…
The Hubble tension as an effect of the renormalization of fundamental constants and cosmological parameters
Fabio Briscese
In this Letter we propose an interpretation of the Hubble tension as an effect of the scale-running of cosmological parameters and fundamental constants, as the Newton's constant $…
Amplitude prescriptions in field theories with complex poles
Damiano Anselmi, Fabio Briscese, Gianluca Calcagni +1
In the context of field theories with complex poles, we scrutinize four inequivalent ways of defining the scattering amplitudes, each forfeiting one or more tenets of standard quan…