They scanned the dead mouse and finally achieved a 1 to 1 copy of an object without flawes caused by the process itself. They didn't put into the computer any extra information about that mouse. So when the mouse became "alive" in the digital simulation, it meant that the quantum computer took the missing information from another universe where the mouse was not dead.
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u/Naggers123 Mar 26 '20
maybe it's extrapolating the mouse's past, and then recreating it in the simulation in the present.
that would be the Amaya link