J. Fröhlich, A. Knowles, B. Schlein, and V. Sohinger. (2020)cite arxiv:2001.11714Comment: 21 pages, no figures, contribution to special volume of J. Stat. Phys. dedicated to Joel L. Lebowitz.
J. Froehlich. (2019)cite arxiv:1912.00726Comment: 24 pages, 3 figures. This paper will appear in a volume dedicated to the memory of Gian Carlo Ghirardi. Technical details of the approach presented in this paper appear in lecture notes of a course presented at LMU-Munich.