ABSTRACT
This research proposes a comprehensive framework to extend standard Boltzmann solvers for inhomogeneous K-essence perturbations in cosmological calculations, crucial for precise CMB power spectrum predictions and dark energy property constraints.
PAPER · PDF
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Key findings
Developed an extended Boltzmann hierarchy for full K-essence perturbation dynamics.
Implemented a modified sound speed treatment evolving with the background field configuration.
Established numerical stability criteria for the coupled field-metric perturbation system.
Outlined a validation protocol against analytical solutions and existing codes.
Limitations & open questions
The framework's performance under extreme parameter values requires further testing.