An interesting paper. My complaint is that they seem to be mixing multiple meanings of “decoherence,” i.e. “The way that quantum interactions of big stuff get hidden in what’s basically thermal noise” and “the effect that makes us measure one thing when we look at stuff.”
On the macroscopic scale, they’re pretty much the same, but it’s still the difference between “practically always” and “for all possible configurations.” Mixing these two things is what leads to the requirement of infinite entropy, actually, so I think the “multiverse” part of the interpretation is quite unlikely.
EDIT: I was too hasty. It can also be viewed as postulating that the two things are the same and then seeing what would happen, which is fine. But not, I think, necessary.
An interesting paper. My complaint is that they seem to be mixing multiple meanings of “decoherence,” i.e. “The way that quantum interactions of big stuff get hidden in what’s basically thermal noise” and “the effect that makes us measure one thing when we look at stuff.”
On the macroscopic scale, they’re pretty much the same, but it’s still the difference between “practically always” and “for all possible configurations.” Mixing these two things is what leads to the requirement of infinite entropy, actually, so I think the “multiverse” part of the interpretation is quite unlikely.
EDIT: I was too hasty. It can also be viewed as postulating that the two things are the same and then seeing what would happen, which is fine. But not, I think, necessary.