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Gravitational Waves Produced by Domain Walls During Inflation

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arxiv 2304.02361 v1 pith:X7DKJI33 submitted 2023-04-05 hep-ph astro-ph.CO

Haipeng An , Chen Yang This is my paper · ORCID
classification hep-phastro-ph.CO
keywords sgwbspectrumgravitationaldomainduringinflationobservedproduced
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abstract

We study the properties of the stochastic gravitational wave background (SGWB) produced by domain walls (DWs) during inflation without forming a network. We numerically simulate the DW production caused by a second-order phase transition and calculate the SGWB spectrum using a $1000\times1000\times1000$ lattice. We show that the SGWB can be observed directly by future terrestrial and spatial gravitational wave detectors and through the B-mode spectrum in CMB. This signal can also explain the common noise process observed by pulsar timing array experiments. With numerical simulations, we derive an empirical formula for the strength and qualitative features of the SGWB spectrum. The details of the SGWB spectrum also contain information about the later evolution of the universe.

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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. Large non-Gaussianities corresponding to first-order phase transitions during inflation

    hep-ph 2024-11 conditional novelty 6.0 of 10

    First-order phase transitions in a spectator field during inflation can imprint order-one non-Gaussianity on the curvature perturbation, with a mild scale dependence.

  2. Inflationary phase transitions in the early Universe: A Bayesian study with space-based gravitational-wave detectors

    astro-ph.CO 2026-03 conditional novelty 5.0 of 10

    With a Taiji-like detector, inflationary phase-transition gravitational-wave backgrounds are detectable at SNR≳10, but reliable parameter reconstruction needs SNR≳33 and degrades with astrophysical foregrounds.

  3. Searching Stochastic Gravitational Wave Background Landscape Across Frequency Bands

    gr-qc 2025-11 conditional novelty 5.0 of 10

    A hybrid cosmic string–domain wall model can fit the NANOGrav 15-year signal, and its high-frequency tail lies within LISA's projected reach, making the interpretation testable.

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