Cosmological Perturbations: From the Early Universe to Late-Time Evolution

Dear Colleagues,

Cosmological perturbations are fundamental to our understanding of both the early and late-time universe. In the early universe, quantum fluctuations during inflation generated primordial density perturbations, which later evolved into the large-scale structure that we observe today. These fluctuations also gave rise to primordial gravitational waves and could have contributed to the formation of primordial black holes (PBHs), which serve as potential dark matter candidates or sources of gravitational wave events.

After the early universe, cosmological perturbations shaped structural evolution in the late-time universe. Understanding perturbations in dark energy, modified gravity, and the formation of large-scale structures is crucial in explaining cosmic acceleration and testing fundamental physics. This Special Issue will explore the full range of cosmological perturbations, from their quantum origins to their impact on both early- and late-time cosmology.

We invite contributions on theoretical, observational, and computational studies on cosmological perturbations. Topics of interest include inflationary models, primordial black holes, non-Gaussian effects, observational signatures in cosmic microwave background (CMB) anisotropies and large-scale structures, stochastic gravitational wave backgrounds, perturbations in dark energy and modified gravity models, and the constraints of current and future observational missions.

Dr. Giovanni Otálora
Guest Editor

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