University thesis:
Dissertation, Georg-August-Universität Göttingen, 2022
Footnote:
Description:
Nonrelativistic, self-gravitating scalar fields are of current interest in several scenarios of cosmological structure formation. This includes the gravitational clustering of dark matter in the late-time Universe which can be described by a class of nonrelativistic scalar fields, as well as the gravitational fragmentation of the inflaton field after the end of inflation. A well-motivated and promising dark matter candidate is the QCD axion. Large axion density fluctuations can be produced in the post-inflationary scenario leading to the gravitational formation of highly compact objects kno...