From the moment when the traveler enters the access point, this world has split with the original world, and the only link that connects these two worlds is the source code system. In my opinion, the source code The system is constructed according to the principle of superposition of states of quantum mechanics, that is, the quantum entangled state of "he is here and there", and in either of the two worlds, the death of the traveler will cause the superposition to collapse into a stable state In the film, the protagonist dies on the train in the new world, and his consciousness in the original world becomes a stable state, so his consciousness will return to the subconscious space of the source code system, After the female officer Goodwin terminated the life of Captain Steven in the original world, his consciousness in the new world became a stable state, so he could continue to exist in the new world.
As the builder of the source code system, the black doctor has always believed that he created a copy world, and every time the captain enters the copy world and returns (that is, he dies there), what will happen to that world? He doesn't care at all. , in fact, it is impossible to know at all, because the connection between the traverser and that world has been severed, and there is no way to return. So Dr. Black took it for granted that that world had ended. In his opinion, what the captain entered was just a reconstructed copy world. This was because he was always on the outside. For him, everything he saw was It is a steady state, just like the hypothetical experiment of Schrödinger's cat, the black doctor always sees the world after opening the box.
. In fact, none of the worlds the captain entered eight times before were destroyed because of his death, but existed in parallel, but the outside world could not detect it. In the same way, after the captain entered the new world for the last time to complete his mission, the female officer in the original world ended the life of the captain's body and cut off the connection with the world where the captain's consciousness was. "The new world is over, the captain is dead, the female officer is relieved that she has freed a veteran, and will also face the penalty of a felony.
In the film, the captain (actually exists as a history teacher Sean) texts the female officer of the new world, and the train bombing will not happen, and the source code system in the new world will wait for the next mission.
PS. Extending the thinking, what if in this new world, Sean, who is possessed by the captain, meets the captain who only exists in the subconscious space of the source code? Will the recursive parallel universe have a stack overflow day?
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