activity
19942026
most citedLorentz invariance with an invariant energy scale

1.2k citations · 9.6k across the 168 of their papers we have counts for

collaborators

173 papers

astro-ph.CO2026

Testing cosmic acceleration from thermogravity without vacuum energy

Dong Ha Lee, João Magueijo, Carsten van de Bruck +1

We present a first background-level observational test of a thermogravity theory in which the Einstein equations are clipped to a trace-free version, the cosmological constant …

hep-th2025

GraviGUT unification with revisited Pati-Salam model

Stephon Alexander, Bruno Alexandre, Michael Fine +2

We propose a graviGUT unification scheme based on the simple orthogonal group that resolves the chiral duplication of weak isospin in Pati--Salam mod…

hep-th2025★ 2 cited

Spontaneous Symmetry Breaking in Graviweak Theory

Stephon Alexander, Bruno Alexandre, Michael Fine +2

Graviweak theory seeks to unify gravity (specifically in its self-dual formulation) with the weak interaction, preying on their parallel chiral structures. In this paper we…

hep-th2023

Unimodular-like times, evolution and Brans-Dicke Gravity

Paolo M Bassani, Joao Magueijo

In unimodular-like theories, the constants of nature are demoted from pre-given parameters to phase space variables. Their canonical duals provide physical time variables. We inves…

hep-th2023★ 4 cited

Vortices, topology and time

Altay Etkin, João Magueijo, Farbod-Sayyed Rassouli

We relate physical time with the topology of magnetic field vortices. We base ourselves on a formulation of unimodular gravity where the cosmological constant appears as the ca…

hep-th2023★ 1 cited

Overall signature of the metric and the cosmological constant

Bruno Alexandre, Steffen Gielen, João Magueijo

We consider a little known aspect of signature change, where the overall sign of the metric is allowed to change, with physical implications. We show how, in different formulations…