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@ARTICLE{Ruiz:643045,
      author       = {Ruiz, Juan Álvarez and Rey, Julián},
      title        = {{G}ravitational waves in ultra-slow-roll and their
                      anisotropy at two loops},
      journal      = {Journal of cosmology and astroparticle physics},
      volume       = {04},
      number       = {04},
      issn         = {1475-7508},
      address      = {London},
      publisher    = {IOP},
      reportid     = {PUBDB-2025-05794, arXiv:2410.09014. DESY-24-149},
      pages        = {026 -},
      year         = {2025},
      note         = {34 pages, 4 figures. Figures corrected and discussion
                      improved. Version accepted for publication in JCAP},
      abstract     = {We compute the non-Gaussian corrections to the energy
                      density and anisotropies ofgravitational waves induced
                      during the radiation era after an ultra-slow-roll phase of
                      inflationby using a diagrammatic approach, and present the
                      corresponding Feynman rules. Our two-loopcalculation
                      includes both the intrinsic non-Gaussianity of the inflaton
                      perturbation δϕ and the non-Gaussianity arising from the
                      nonlinear relation between the latter and the
                      curvatureperturbation ℛ, which we find to be subdominant
                      with respect to the former. We applyour formalism to an
                      analytical model in which the ultra-slow-roll phase is
                      followed by aconstant-roll stage with a nonvanishing second
                      slow-roll parameter η, and address therenormalization of
                      the one-loop scalar power spectrum in this scenario.},
      keywords     = {cosmological perturbation theory (autogen) / inflation
                      (autogen) / primordial gravitational waves (theory)
                      (autogen) / primordial black holes (autogen)},
      cin          = {T},
      ddc          = {530},
      cid          = {I:(DE-H253)T-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) / DFG
                      project G:(GEPRIS)390833306 - EXC 2121: Das Quantisierte
                      Universum II (390833306)},
      pid          = {G:(DE-HGF)POF4-611 / G:(GEPRIS)390833306},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2410.09014},
      howpublished = {arXiv:2410.09014},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2410.09014;\%\%$},
      doi          = {10.1088/1475-7516/2025/04/026},
      url          = {https://bib-pubdb1.desy.de/record/643045},
}