tag:blogger.com,1999:blog-13869903.post738173509450480712..comments2024-03-29T02:45:10.096-05:00Comments on nanoscale views: Brief itemsDouglas Natelsonhttp://www.blogger.com/profile/13340091255404229559noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-13869903.post-21790096283716766142017-01-16T21:07:43.793-06:002017-01-16T21:07:43.793-06:00Thanks for that reference. Interesting! I'm ...Thanks for that reference. Interesting! I'm not sure I'd really call all of those distinct formulations, though. The density matrix approach is really a way of keeping track of mixed states nicely, and assumes the underlying Hilbert space structure that's in, e.g., the matrix formulation. If you don't know about states and their inner products and operators on those states, you can't write down the density matrix....Douglas Natelsonhttps://www.blogger.com/profile/13340091255404229559noreply@blogger.comtag:blogger.com,1999:blog-13869903.post-66870424933068070112017-01-15T09:48:57.688-06:002017-01-15T09:48:57.688-06:00Regarding the last point "Speaking of both qu...Regarding the last point "Speaking of both quantum mechanics interpretations and popular writings about physics....." I recommend to read "Nine formulations of quantum mechanics" (http://aapt.scitation.org/doi/10.1119/1.1445404).Anonymousnoreply@blogger.com