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Cosmological Particle Production: A Review

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arxiv 2112.02444 v1 pith:GU2GIACL submitted 2021-12-04 gr-qc astro-ph.COquant-ph

Cosmological Particle Production: A Review

classification gr-qc astro-ph.COquant-ph
keywords willcreationmodelsparticleappliedcosmologicalphysicalprinciples
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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This article will review quantum particle creation in expanding universes. The emphasis will be on the basic physical principles and on selected applications to cosmological models. The needed formalism of quantum field theory in curved spacetime will be summarized, and applied to the example of scalar particle creation in a spatially flat universe. Estimates for the creation rate will be given and applied to inflationary cosmology models. Analog models which illustrate the same physical principles and may be experimentally realizable are also discussed.

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Cited by 6 Pith papers

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

  1. Scattered wave functions and worldline instantons for particle production in curved spacetime

    gr-qc 2026-06 unverdicted novelty 6.0

    Extends scattered-wave-function and open-worldline-instanton methods to multidimensional curved spacetimes and demonstrates agreement on 2D metric examples.

  2. Nonthermal leptogenesis via cosmological gravitational particle production is tested by inflationary gravitational waves

    hep-ph 2026-05 unverdicted novelty 5.0

    Certain inflation models produce right-handed neutrinos via gravitational effects sufficient for leptogenesis to explain the baryon asymmetry, testable by inflationary gravitational waves.

  3. Inflationary magnetogenesis from non-minimal coupling in large- and small-field potentials

    astro-ph.CO 2026-04 unverdicted novelty 5.0

    Non-minimal coupling in large-field inflation models boosts primordial magnetic fields to present-day strengths of ~10^{-13} G while small-field models produce negligible amplitudes.

  4. Gravitational scalar production with a generic reheating scenario

    hep-ph 2026-02 unverdicted novelty 5.0

    Gravitational scalar production yields reheating-dependent constraints on dark matter scalars, with dilution preserving viability for k<4 low-temperature reheating and factorization in multi-stage cases.

  5. Running Vacuum in the expanding Universe: a unified QFT paradigm for Inflation and Dark Energy

    gr-qc 2026-06 unverdicted novelty 3.0

    The running vacuum model derives dynamical vacuum energy from QFT in curved spacetime, using H^4 terms for inflation and H^2 terms for dark energy while G evolves logarithmically.

  6. Gravitational particle production, the cosmological tensions and fast radio bursts

    gr-qc 2025-08 unverdicted novelty 3.0

    Gravitational vacuum polarization explains the Hubble tension by increasing direct H0 measurements while leaving indirect ones unaffected, does not impact the sigma8 tension, and predicts FRB measurements match CMB/BA...