Marcoen
But the photon received reflects the state as was, ie at the interaction.
Now, whether or not that interaction has any effect on the electron is another matter. And if it did, it did. The electron is then just in a different subsequent state to what it would otherwise have been in. It is not in a different state, because the subsequent state (ie future) does not not pre-exist. And anyway, I have no doubt this electron is being bombarded by many photons.
Thanks for the reference, when I have time. You may note I post early morning as I do not sleep well, Then I get on with the day which a the moment comprises of going over my replacement camper van (the other one got stolen) then renovating my son's flat. Retirement was supposed to be a time of ret!
Paul
Paul