.....I have no idea what the above drawing is all about. Apparently it is what makes time travel possible (sorry Flux Capacitor).
I think we've all learned our lesson about time traveling to the past from about every movie about time travel. It's impossible because of the whole 'Grandfather Paradox thing'. Turns out a MIT professor and his quantum gang came up with a way of quantum time traveling to the past without the repercussions.
Now postselection gets even weirder thanks to some new ideas put forward by Seth Lloyd at the Massachusetts Institute of Technology and a few buddies. They say that if you combine postselection with another strange quantum behaviour called teleportation and you can build a time machine. Lloyd and cos idea is to use postselection to make this process happen in reverse. Postselection ensures that only a certain type of state can be teleported. This immediately places a limit on the state the original particle must have been in before it was teleported. In effect, the state of this particle has travelled back in time.AAARRRRGG!....My ocular jelly and frontal lobe hurt now from reading that...!
Seems they know what they are talking about, after all they are professors at MIT, why would I even question this quantum idea. Anyhow, if you want to read more on this time travel idea hit the link below.
....perhaps I can time travel back in time to stop myself from posting this article in the first place....hhhmmmm