Counting measurements

  • Thread starter Berlin
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Berlin

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I was tought that a physical measurement must be seen as an irreversible collapse of the wavefunction. I always thought that this is an ill defined statement. But let's assume that some macroscopic system is able to perform this act and that it is part of physical reality.

My questions: has someone figured out how many "macroscopic systems (or ensembles?)" in the universe are capable of doing measurements and can one thus calculate the amount of measurement per second (or volume) which should occure in the universe? Never be afraid asking stupid questions!

I have the feeling that forcing a lot of particles into their localisation /momentum /spin or whatever eigenstate should have a calculable influence on the dynamics of the universe or could break symmetries. Indeed, when you open the box with schroedingers cat, and you have a mechanism where one dead cat increases the chance for a next dead cat in another box you will have a running effect away from symmetry. Something like spontaneous magnetization. Any literature on this?

Berlin
 

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