Which are the main claims of this theory?

Is there a theory of decoherence ?

If you want to know more about decoherence, you should look up the work by P. Blanchard (from the 1970's till now). He has done quite some research on this. I should warn you: quite some quantum physics ahead :)

Bye!

Crisp

It's possible in this universe to isolate a system so perfectly that doesn't interact with anything (thus no decoherence)?