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$T_0$ censorship of early dark energy and AdS vacua

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arxiv 2008.10832 v2 pith:5JJBHCQJ submitted 2020-08-25 astro-ph.CO gr-qchep-th

Gen Ye , Yun-Song Piao This is my paper · ORCID
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keywords analysiscarlochaindarkearlyenergyfirasmarkov
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abstract

Present-day temperature $T_0$ of cosmic microwave background has been precisely measured by the FIRAS experiment. We identify that the early dark energy (EDE) (non-negligible around matter-radiation equality) scenario can remain compatible with the FIRAS result, while lifting the Hubble constant $H_0$. We perform Monte Carlo Markov chain analysis to confirm our observations. We also present an $\alpha$-attractor Anti-de Sitter (AdS) model of EDE, in which the AdS depth is consistently varied in the Monte Carlo Markov chain analysis. We found that our datasets weakly hinted the existence of an AdS phase near recombination with $H_0\sim 73$km/s/Mpc at 1$\sigma$ region in the best-fit model.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Hubble tension: the shape wall

    astro-ph.CO 2026-07 accept novelty 6.0 of 10

    Late-time modifications to the expansion history can raise H0 by at most about 2% (conservative) to 3.7% (permissive) if the CMB acoustic scale is fixed.

  2. Can the universe experience an AdS landscape since matter-radiation equality?

    gr-qc 2025-06 conditional novelty 5.0 of 10

    A universe with an AdS (negative cosmological constant) phase at recombination and another at low redshift is compatible with Planck, DESI, Pantheon Plus and SH0ES data, though not preferred by them.

  3. Can the sound horizon-free measurement of $H_0$ constrain early new physics?

    astro-ph.CO 2025-01 conditional novelty 5.0 of 10

    Mock galaxy-survey analyses show that sound-horizon-free H0 measurements do not currently rule out BAO-compatible early dark energy models, and LambdaCDM-derived priors can bias the result.

  4. Hubble tension: a short review of theoretical explanations

    astro-ph.CO 2026-07 accept novelty 4.0 of 10

    A comprehensive review finds no theoretical Hubble-tension solution yet passes all consistency tests; new early-dark-energy chains reach high H0 only when the SH0ES calibration is added.

  5. Imprint of swampland-inspired coupled early dark energy

    astro-ph.CO 2026-07 conditional novelty 4.0 of 10

    A swampland-inspired DM-EDE coupling is tested against DESI DR2 BAO data, showing the EDE potential construction affects late-time dark energy constraints.

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