http://archiveofourown.org/works/705211
SchrĂśdinger's Cat (Or, the Five Times Harry and Louis Both Met and Did Not Meet) -Â aimmyarrowshigh
"SchrĂśdinger's cat" is a paradox applied within the many-worlds theory of quantum mechanics which basically posits that if you have a box containing a cat and a flask of poison, until you open the box and determine whether the cat is dead or alive, it is both; within the theory of multiple universes, the box is a branching point, or a moment of divergence between the universe in which the cat is alive and the universe in which the cat is dead. Both are true in their own worlds.
When two people are fated to be together, their lives are full of such branching moments, instances that split the universe in two more actualities, one that begins their future together and one in which they have to wait a bit longer still.
These are the five moments in which Harry and Louis both did, and did not, meet.