Abstract
Early dark energy that relieves Hubble tension leaves a fingerprint in the primordial stochastic gravitational wave background that originates from cosmic string network. The signal is not only detectable with future planned gravitational wave experiments, but also distinguishable from other astrophysical and cosmological signals in the gravitational wave frequency spectrum. We find that the cosmic string gravitational wave spectrum can probe other new physics that are generated in post-big bang nucleosynthesis, which extends GW cosmic archaeology search region.
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