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Resonance instability of primordial gravitational waves during inflation in Chern-Simons gravity

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arxiv 2006.03771 v4 pith:ASN43N2X submitted 2020-06-06 gr-qc

Chengjie Fu , Jing Liu , Tao Zhu , Hongwei Yu , Puxun Wu This is my paper · ORCID
classification gr-qc
keywords gravitationalchern-simonsdifferentgravityinflationresonancewavesamplification
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We investigate axion inflation where the gravitational Chern-Simons term is coupled to a periodic function of the inflaton. We find that tensor perturbations with different polarizations are amplified in different ways by the Chern-Simons coupling. Depending on the model parameters, the resonance amplification results in a parity-violating peak or a board plateau in the energy spectrum of gravitational waves, and the sharp cutoff in the infrared region constitutes a characteristic distinguishable from stochastic gravitational wave backgrounds produced by matter fields in Einstein gravity.

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Cited by 2 Pith papers

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  1. Alternative LISA-TAIJI networks: Detectability of the Parity Violation in Stochastic Gravitational Wave Background

    gr-qc 2024-12 accept novelty 6.0 of 10

    The LISA-TAIJIm configuration, with TAIJI's constellation inclined opposite to LISA's, is about an order of magnitude more sensitive to a circularly polarized stochastic gravitational wave background at low frequencie...

  2. Fixed-Time Voltage Regulation for Boost Converters via Unit-Safe Saturating Functions

    eess.SY 2025-08 unverdicted novelty 4.0 of 10

    A fixed-time feedback controller for boost converters uses a new class of saturating functions, observers, and adaptive gains to regulate output voltage within a bounded settling time under unknown load resistance.

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