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From the Fokker-Planck equation to perturbative QFT's results in de Sitter space

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arxiv 2504.20646 v2 pith:XNW3XEJP submitted 2025-04-29 hep-th gr-qc

classification hep-thgr-qc
keywords correlationequationfunctionsfieldfokker-planckperturbativesitterspace
verification ladder T0 review T1 audit T2 compute T3 formal
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A technique to build perturbative series for the spectator field's correlation functions in de Sitter space through the Fokker-Planck equation is proposed. We derive from the first-order differential equation the iterative integral relation for equal- and multi-time correlation functions. With an appropriate integration, the obtained two-point and four-point correlation functions are in agreement with quantum field theory's ones.

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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. Stochastic inflation from a non-equilibrium renormalization group

    hep-th 2026-05 unverdicted novelty 7.0 of 10

    Stochastic inflation is the leading infrared limit of a coarse-grained Schwinger–Keldysh effective theory, and the same Fokker–Planck dynamics follows from a Polchinski-type renormalization-group flow for the reduced ...

  2. Confronting infrared divergences in de Sitter: loops, logarithms and the stochastic formalism

    hep-th 2025-07 conditional novelty 7.0 of 10

    The authors show that loop corrections do not alter tree-level time dependence in de Sitter correlators, so secular growth is a regularization artifact, not a physical effect.

  3. Leading Logarithm Quantum Gravity II

    gr-qc 2025-07 conditional novelty 6.0 of 10

    The paper derives the leading-logarithm equations of motion for pure quantum gravity in accelerating spacetimes, whose solutions are claimed to re-sum all perturbative leading logarithms to all orders.

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