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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 6 Pith papers

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