3 papers
astro-ph.CO2025
Collapse of Axion Domain Wall Induced by Helical Primordial Magnetic Fields
Zizhuo Zhao, Yuefeng Di, Ligong Bian +1
Stable domain wall (DW) must decay to avoid overclose the Universe. A commonly used solution is to slightly break the PQ symmetry by introducing a bias term in the potential. In th…
astro-ph.CO2025
Testing Nambu-Goto approximation of cosmic string by lattice field simulations
Zizhuo Zhao, Ligong Bian, Jing Shu
The precise calculation of gravitational wave (GW) from cosmic string networks is of significant theoretical and experimental interest. The Nambu--Goto (NG) approximation has long…
astro-ph.CO2024
Cosmic Simulations of Axion String-Wall Networks: Probing Dark Matter and Gravitational Waves for Discovery
Yang Li, Ligong Bian, Rong-Gen Cai +1
We simultaneously study gravitational waves (GWs) and free axions emitted from axionic string-wall networks in the early universe using advanced 3D lattice simulations. Our simulat…