14 citations · 21 across the 4 of their papers we have counts for
4 papers
Gravitational waves from axion inflation in the gradient expansion formalism. Part II. Fermionic axion inflation
Richard von Eckardstein, Kai Schmitz, Oleksandr Sobol
Axion inflation represents an intriguing source of gravitational waves (GWs) from the early Universe. In a companion paper, arXiv:2508.00798, we previously leveraged the gradient e…
Vector dark matter production during inflation in the gradient-expansion formalism
A. V. Lysenko, O. O. Sobol, S. I. Vilchinskii
A massive vector field is a highly promising candidate for dark matter in the Universe. A salient property of dark matter is its negligible or null coupling to ordinary matter, wit…
Gravitational waves from axion inflation in the gradient expansion formalism. Part I. Pure axion inflation
Richard von Eckardstein, Kai Schmitz, Oleksandr Sobol
Axion inflation is a well-motivated model of cosmic inflation with a rich phenomenology. The abundant production of gauge fields during axion inflation notably sources a stochastic…
On the Schwinger effect during axion inflation
Richard von Eckardstein, Kai Schmitz, Oleksandr Sobol
Pair-creation of charged particles in a strong gauge-field background - the renowned Schwinger effect - can strongly alter the efficiency of gauge-field production during axion inf…