Orateur
Description
Entangled Relativity is a non-linear reformulation of General Relativity that precludes the definition of a universe devoid of matter. In this framework, matter and spacetime are inseparably linked, in the literal sense that the gravitational dynamics cannot be defined independently of matter fields.
Despite its non-standard formulation, the phenomenology of General Relativity can be recovered through an “intrinsic decoupling”, originally identified in scalar-tensor theories, such that General Relativity emerges as a limiting regime of the theory.
A key prediction of Entangled Relativity is a variation of the Planck quantum of action, ℏ. Although this variation is extremely small in amplitude, it generically leaves an imprint on thermal radiation, such as the Cosmic Microwave Background.
In this talk, we review recent numerical estimates of the expected variation of ℏ, with particular emphasis on high-density environments such as white dwarfs, neutron stars, and binary systems composed of both. These environments provide unique natural laboratories for constraining a varying ℏ through observations of electromagnetic signals and gravitational waves.
The talk is based on 10.1088/1361-6382/ae30c7 and 10.1103/n927-nrbn.