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On matching conditions for cosmological perturbations

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arxiv gr-qc/9503050 v1 pith:TR5SL3K4 submitted 1995-03-27 gr-qc hep-th

Nathalie Deruelle , V.F. Mukhanov This is my paper · ORCID
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keywords perturbationsconditionscosmologicalmatchingtransitionapplicationsclarifiedconcerning
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We derive the matching conditions for cosmological perturbations in a Friedmann Universe where the equation of state undergoes a sharp jump, for instance as a result of a phase transition. The physics of the transition which is needed to follow the fate of the perturbations is clarified. We dissipate misleading statements made recently in the literature concerning the predictions of the primordial fluctuations from inflation and confirm standard results. Applications to string cosmology are considered.

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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. Phase-resolved field-space distance criteria in ekpyrotic, bouncing and cyclic cosmologies

    gr-qc 2026-05 unverdicted novelty 7.0 of 10

    Proposes phase-resolved invariant path-length criteria and a master formula for lower bound on ε_ek in ekpyrotic cosmologies, using BKL suppression and conversion windows as constraints.

  2. A Landscape of Cosmological Decoherence

    gr-qc 2026-06 unverdicted novelty 6.0 of 10

    Requiring decohered cosmological perturbations to admit a classical P-function forces their momentum variance above the vacuum value, and demanding a linear gravitational potential at reheating bounds that variance by...

  3. Evolution of Linear Perturbations under Time-Dependent Hubble Friction I: SR-USR-SR Inflation

    gr-qc 2026-02 conditional novelty 5.0 of 10

    Analytic asymptotics show the dip in the SR-USR-SR curvature power spectrum comes from cancellation between two growing modes, not a constant-versus-growing cancellation.

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