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astro-ph.CO2025
Twisted echoes of an odd quartet: Scalar-induced gravitational waves as a probe of primordial parity-violation
H. V. Ragavendra, Nicola Bartolo
Parity-violation leaves tell-tale trails in many cosmological observables. We illustrate parity-odd primordial scalar trispectra, that despite being of modest strength, impart dete…
astro-ph.CO2025
Scalar-induced gravitational waves from coherent initial states
Dipayan Mukherjee, H. V. Ragavendra, Shiv K. Sethi
We investigate the impact of statistical inhomogeneity and anisotropy in primordial scalar perturbations on the scalar-induced gravitational waves (SIGW). Assuming inflationary qua…