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Universal Gravitational Waves from Interacting and Clustered Solitons

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arxiv 2309.14193 v2 pith:R6WRKBUY submitted 2023-09-25 astro-ph.CO gr-qchep-ph

Kaloian D. Lozanov , Misao Sasaki , Volodymyr Takhistov This is my paper · ORCID
classification astro-ph.COgr-qchep-ph
keywords solitonuniversalgravitationalsolitonsdensityfieldinteractingoscillons
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Causal soliton formation (e.g. oscillons, Q-balls) in the primordial Universe is expected to give rise to a universal gravitational wave (GW) background, at frequencies smaller than scales of nonlinearity. We show that modifications of the soliton density field, driven by soliton interactions or initial conditions, can significantly enhance universal GWs. Gravitational clustering of solitons naturally leads to generation of correlations in the large-scale soliton density field. As we demonstrate for axion-like particle (ALP) oscillons, the growing power spectrum amplifies universal GW signals, opening new avenues for probing the physics of the early Universe with upcoming GW experiments. Our results are applicable to variety of scenarios, such as solitons interacting through a long range Yukawa-like fifth force.

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Cited by 3 Pith papers

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  1. Constraining the inflaton potential with gravitational waves from oscillons

    astro-ph.CO 2026-01 conditional novelty 6.0 of 10

    The rapid decay of an oscillon-dominated post-inflation phase produces induced gravitational waves strong enough that the BBN/CMB bound on relativistic species excludes significant regions of inflaton mass–coupling pa...

  2. Ephemeral Oscillons in Scalar-Tensor Theories: The Higgs-like case

    hep-ph 2025-01 conditional novelty 6.0 of 10

    In a Higgs-like Einstein-Cartan inflation model, oscillons formed after inflation are short-lived and their decay drives radiation domination within about four e-folds.

  3. Isotropic background and anisotropies of gravitational waves induced by cosmological soliton isocurvature perturbations

    astro-ph.CO 2025-01 conditional novelty 6.0 of 10

    Soliton isocurvature perturbations produce gravitational waves whose sky anisotropies are enhanced by non-Gaussianity, offering a new probe of the early universe.

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