A Hubble-scale domain wall quintessence model produces anisotropic expansion but is tightly constrained by Planck CMB quadrupole limits and supernova data to a negligible contribution, favoring standard LambdaCDM.
Domain Walls as Dark Energy
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abstract
The possibility that the energy density of the Universe is dominated by a network of low-tension domain walls provides an alternative to the commonly discussed cosmological constant and scalar-field quintessence models of dark energy. We quantify the lower bound on the number density of the domain walls that follows from the observed near-isotropy of the cosmic microwave background radiation. This bound can be satisfied by a strongly frustrated domain wall network. No fine-tuning of the parameters of the underlying field theory model is required. We briefly outline the observational consequences of this model.
representative citing papers
A realistic Taiji-like analysis recovers an injected complex-singlet phase-transition gravitational-wave signal at relative SNR ≈ 53 with ln BF ≈ 11.6, and maps the spectrum posterior onto the Higgs cubic self-coupling deviation δκ3.
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Domain-wall Quintessence
A Hubble-scale domain wall quintessence model produces anisotropic expansion but is tightly constrained by Planck CMB quadrupole limits and supernova data to a negligible contribution, favoring standard LambdaCDM.
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Bayesian analysis of the complex singlet model with phase transition gravitational waves
A realistic Taiji-like analysis recovers an injected complex-singlet phase-transition gravitational-wave signal at relative SNR ≈ 53 with ln BF ≈ 11.6, and maps the spectrum posterior onto the Higgs cubic self-coupling deviation δκ3.