Balázs Szigeti, István Szapudi, Imre Barna, Gergely Gábor Barnaföldi (2024.08.01-2024.10.30.)

Abstract: The Hubble constant \(H_0\) characterizes the rate of the universe's expansion. The discrepancy between the low and high redshift measurements of \(H_0\) is the highest significance tension within the concordance \(\Lambda\)CDM paradigm. We show that a G\"odel inspired slowly rotating dark-fluid variant of the concordance model resolves this tension with an angular velocity today \(\omega_0 \simeq 2\times 10^{-3}\)~Gyr\(^{-1}\). Curiously, this is approximately also the maximal rotation with a tangential velocity less than the speed of light at the horizon.