The Universe as Cosmic Dashboard

31-Jul-2019
From Scientific America
Relational quantum mechanics suggests physics might be a science of perceptions, not observer-independent reality

One of the weirdest theoretical implications of quantum mechanics is that different observers can give different—though equally valid—accounts of the same sequence of events. As highlighted by physicist Carlo Rovelli in his relational quantum mechanics (RQM), this means that there should be no absolute, observer-independent physical quantities. All physical quantities—the whole physical universe—must be relative to the observer. The notion that we all share the same physical environment must, therefore, be an illusion.


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