J. Mazer:
> But can decoherence really "forbid" macroscopic superpositions in principle,
> or only in practice?

Well, experiments have been done many times, showing
the effect of decoherence on (macroscopic) quantum superpositions
http://physicsweb.org/article/world/13/8/3/1
http://physicsweb.org/article/news/4/7/2/1
http://www.nature.com/cgi-taf/DynaPage.taf?file=/nature/journal/v406/n6791/abs/4
06043a0_fs.html


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