[ExI] wormholes vs. nonlocal correlation

[Damien Broderick]

John Cramer published a paper in 1991 on quantum time travel:
http://www.npl.washington.edu/AV/altvw45.html
He notes: "The point of departure of the AAPV calculation from 
standard quantum mechanics is that it applies the principle of 
superposition to the time evolutions of a group of similar quantum 
states. This is not normally done in quantum mechanics, but it should 
be OK. It seems to be consistent with both the formalism of the 
theory and its usual interpretation, **provided the states are 
isolated from measurement and outside interaction while evolving.**"

I suspected that my notion falls down immediately for much the same 
reason; presumably you can't slow or trap one part of the entangled 
system without (in effect) clobbering it with other particles or 
fields, breaking the entanglement. Yes? Or might new entanglements 
just be added without decohering the initial state?

Damien Broderick