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Two simple photon gauges in inflation

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arxiv 2503.12630 v2 pith:EU54OQMI submitted 2025-03-16 gr-qc astro-ph.COhep-th

classification gr-qcastro-ph.COhep-th
keywords gaugesinflationphotonpropagatorssimplearbitrarycomparedcomputations
verification ladder T0 review T1 audit T2 compute T3 formal
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Photon propagators for power-law inflation are constructed in two one-parameter families of noncovariant gauges, in an arbitrary number of spacetime dimensions. In both gauges photon propagators take relatively simple forms expressed in terms of scalar propagators and their derivatives. These are considerably simpler compared to their general covariant gauge counterpart. This makes feasible performing dimensionally regulated loop computations involving massless vector fields in inflation.

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Cited by 2 Pith papers

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

  1. Bulk-to-bulk photon propagator in AdS

    hep-th 2025-10 unverdicted novelty 6.0 of 10

    The bulk-to-bulk photon propagator in Euclidean AdS is derived in axial, Coulomb and covariant gauges, with the simplest position-space form in the Fried–Yennie gauge ξ=d/(d−2).

  2. Measurements in stochastic gravity and thermal variance

    gr-qc 2025-06 conditional novelty 6.0 of 10

    Thermal photon fluctuations in a curved spacetime generate metric variance that, in the Fewster-Verch measurement scheme, equals the stochastic gravity noise kernel exactly.

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