I think quantum darwinism is on the right track. FWIW, I found Zurek’s presentation of it here to be more clear to me.
The gist of it is, AFAICT:
Entangled states have a symmetry called envariance
This symmetry implies certain states must have equal probabilities
Other states can be decomposed into the kind from before
Putting this together implies the Born rule
I think quantum darwinism is on the right track. FWIW, I found Zurek’s presentation of it here to be more clear to me.
The gist of it is, AFAICT:
Entangled states have a symmetry called envariance
This symmetry implies certain states must have equal probabilities
Other states can be decomposed into the kind from before
Putting this together implies the Born rule