Hybrid presence c/o Stasi Seminar Room + zooom meeting. Kindly note that the maximum number of participants in presence is 24 pp.
Abstract. A massive, nonrelativistic scalar field in an expanding spacetime is usually approximated by a pressureless perfect fluid, which leads to the standard conclusion that such a field can play the role of cold dark matter. In this talk, I will try to systematically study these approximations and incorporate subleading corrections.