Axion Dark Matter and Cosmology
A special issue of Universe (ISSN 2218-1997). This special issue belongs to the section "Cosmology".
Deadline for manuscript submissions: 30 September 2026 | Viewed by 12
Special Issue Editor
Special Issue Information
Dear Colleagues,
Exploring solutions to the strong CP problem, the particle nature of dark matter, and the origin of the baryon asymmetry of the universe are important tasks in high-energy physics and cosmology. It is believed that axion physics provides excellent solutions to these problems, making the axion a focus of exploration.
Regarding axion physics and cosmology, there are several main areas of research: The first is the theoretical setup of Peccei-Quinn symmetry regarding the UV origin of the axion. The second is the production mechanisms of axion dark matter in the early universe. The third is solitons or topological defects related to axion physics, such as axion stars, cosmic strings and domain walls. The fourth is the precision calculation of the axion mass and solutions to the quality problem. The fifth is related to the direct detection of axions in laboratories. In addition, excellent studies exist on connections between the axion and cosmology, as well as astronomy.
The main goals of this Special Issue are to understand the fundamental theoretical setup of axion physics, to explore the potential impacts of the axion on cosmology, and to detect possible signals of axion dark matter in laboratories. We will accept not only phenomenological studies but also more fundamental research, such as grand unification theories, thermal field theory, phase transition and topological defects, and gravitational wave physics and string theories, which are deeply related to axion physics.
Dr. Wei Chao
Guest Editor
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Keywords
- axion physics
- strong CP problem
- topological defects
- quality problem
- dark matter
- baryogenesis
- thermal field theory
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