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Quantum fields and the cosmological constant

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arxiv 2503.17203 v2 pith:C22PB67O submitted 2025-03-21 hep-th gr-qc

Renata Ferrero , Vincenzo Naso , Roberto Percacci This is my paper
classification hep-thgr-qc
keywords constantcosmologicalcutofffieldsquantumresultactionadjustments
verification ladder T0 review T1 audit T2 compute T3 formal
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It has been shown that if one solves self-consistently the semiclassical Einstein equations in the presence of a quantum scalar field, with a cutoff on the number of modes, spacetime become flatter when the cutoff increases. Here we extend the result to include the effect of fields with spin 0, 1/2, 1 and 2. With minor adjustments, the main result persists. Remarkably, one can have positive curvature even if the cosmological constant in the bare action is negative.

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Cited by 3 Pith papers

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

  1. Geometric noise spectrum in interferometers

    hep-th 2026-01 unverdicted novelty 6.0 of 10

    The noise spectrum an interferometer would see from quantum spacetime jitter is computed for vacuum, thermal, squeezed, and scalar-backreaction states; all are Planck-suppressed.

  2. Fixed points of classical gravity coupled with a Standard-Model-like theory

    hep-th 2025-09 conditional novelty 6.0 of 10

    A free conformal matter content with n1/2=4n1 and n'_0=3n1 gives a UV fixed point where all stress tensor correlators are finite; the Standard Model with right-handed neutrinos and 36 four-derivative scalars is such a theory.

  3. Gravity and the Higgs boson mass

    hep-th 2025-07 reject novelty 5.0 of 10

    For a scalar field on a sphere, the Fradkin-Vilkovisky measure combined with an on-shell cutoff identification converts the famous quadratic mass divergence into a logarithmic one.

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