# Causal Classical Physics in Time Symmetric Quantum Mechanics. (arXiv:1802.02090v1 [quant-ph])

The letter submitted is an executive summary of our previous paper. To solve

the Einstein Podolsky Rosen 'paradox' the two boundary quantum mechanics is

taken as self consistent interpretation of quantum dynamics. The difficulty

with this interpretation is to reconcile it with classical physics. To avoid

macroscopic backward causation two 'corresponding transition rules' are

formulated which specify needed properties of macroscopic observations and

manipulations. The apparent classical causal decision tree requires to

understand the classically unchosen options. They are taken to occur with an

'incomplete knowledge' of the boundary states typically in macroscopic

considerations. The precise boundary conditions with given phases then select

the actual measured path and this selection is mistaken to happen at the time

of measurement. The apparent time direction of the decision tree originates in

an assumed relative proximity to the initial state. Only the far away final

state allows for classically distinct options to be selected from.

Cosmologically the picture could correspond to a big bang initial and a hugely

extended final state scenario. It is speculated that it might also hold for a

big bang/big crunch world. If this would be the case the Born probability

postulate could find a natural explanation if we coexist in the expanding and

the correlated CPT conjugate contracting world.