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Working paper Open Access

Alleviating $\Lambda$CDM tension in Pantheon in late time quantum cosmology

Maurice H.P.M. van Putten

Surveys of the Local Universe show a Hubble expansion significantly greater than $\Lambda$CDM estimates from the Cosmic 
Microwave Background by Planck. This may present a challenge to our application of general relativity to cosmology. 
Such tensions are expected in quantum cosmology, wherein de Sitter space is unstable by dark energy from the cosmological 
horizon ${\cal H}$. We report on a novel probe of late time cosmology in terms of matter density $\omega_m$ estimated over inner intervals $[0,z_{\max}]$. Independent of Planck, Pantheon data over $0<z_{\max}\le2.26$ are found to exclude $\Lambda$CDM by 
over $4\sigma$. In quantum cosmology, this reduces to $3.1\sigma$.


Follow-up to "H0 tension in Swampland: theory confronts reality", Nov 28-30, 2018, APCTP, Pohang
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