I was thinking about death as I often do (No, I'm not emo) and I came up with a hypothesis.
This point assumes no such thing as astral projection, a soul or anything of the sort.
Our brain is of a finite physical size, therefore only a finite number of quantum states can exist within an area the size of our brain, or smaller.
The majority of quantum states that exist within an area the size of our brain will not produce intelligence, far less consciousness.
Assuming consciousness originates from our brain, the specific quantum state that is our brain or even our individual consciousness could take place a second time.
What do you think?