I wasn't really sure where to put this, but I guess this works.

Just a few seconds ago, I had déjà vu. I've been studying Quantum Physics off and on, on my own time at home. I'm obsessed with it, I can apply it with everything it seems like. Especially déjà vu.

Just a few minutes ago, I had déjà vu. I was talking to a friend of mine, and had déjà vu, which I had déjà vu about having déjà vu. It continued to increase till it just stopped with this idea.

If you know of Quantum Physics, you'll know that there are supposed multiple universes. With every decision made, a new universe is created with the opposite decision.

Example. You flip a coin, it lands on tails. In this universe the opportunity for that coin to land on heads is ultimately crushed. However, in order for the coin to land on heads, a new universe with a new future is created for that coin to land on heads.

My idea for déjà vu, is that two universes join back up at a certain point because of a decision just made. It's hard for me to explain, but I understand it in my head. Déjà vu occurs because two different universes very very very parallel to the one we're living right now meet at a point in time due to a decision or event that occurred, or is occurring right now, but in a separate universe.

We're the past to a future.

*has a headache now*

No, because then everyone would experience it at the same time. Research suggests that deja vu is



Ref

And be careful with the whole "multiverse" thing - its more commonly based in cosmology, not quantun physics. Lets face it, QP is confusing enough as it is!

YES, another quantum physics fan! I was really obsessed with it too. And it gets hard to explain to others so we look crazy... o well

first time I'm hearing about this "a new universe does the opposite" is this all theory based or is there anything more to back it up?

But the position of and size of where you are in spacetime right now eliminates all the possibilities in quantum physics to one possible situation to 100%, so you can not experience multiple times at once in the observable world. So I doubt Deja vu is connected.

That's not quite true. What you're talking about is an interpretation of quantum mechanics called the many worlds interpretation. However, there's a point about that interpretation that is often not made clear: "many worlds" does not mean "parallel universes." All of the many worlds take place in the same universe.

Briefly, in quantum mechanics a system appears to be in a superposition of states (that is, in all of them at once to some degree) until something specifically happens to it ("measurement") and it "collapses" into a single state. The whole idea of a collapse into a single state out of many is itself a philosophical interpretation known as the Copenhagen interpretation. The many worlds interpretation is a rival interpretation that rejects the idea of a collapse at all. Sometimes people describe the many worlds in such a way that it sounds like there is a collapse--that is, the system collapses down to a single state in our universe but a bunch of separate universes also spring up in which the other possibilities are played out. If that were the case, there'd really be no point to throwing in all that talk of new universes on top of the Copenhagen collapse because it doesn't shed any light on the actual mystery, which is the question of what the collapse is.

In the many worlds interpretation, there is never a collapse out of the superposition of states down to a single state and there is never the formation of a separate universe. There are "branchings" so to speak but that's only because things happen--whenever there are two or more possibilities for some outcome there will always be "branchings." Anyway, the point of many worlds is that there is never a collapse out of the superposition of states: everything is in a superposition of all possible states all the time (again, in the same universe). Take your coin flipping example. In many worlds, when you flip the coin you measure it as being both heads and tails. Of course, it seems like we've made the coin pick one or the other (i.e. "collapse") and be either heads or tails. In the many worlds interpretation, observing the coin entangles the observer's states with the coin's state and now the observer himself is in a superposition of states, one in which he sees the coin as heads and one in which he sees the coin as tails (again, the idea is not that when you look at the coin and see it as heads, that a separate parallel universe springs up somewhere in which you see the coin being tails--it's all in the same universe and, indeed, the same room). Now, there are questions as to why this appears to disagree with what we perceive (why we always seem to perceive only one, definite possibility) and there's been a lot of work done by different people on the idea. But I just wanted to point out that the many worlds interpretation is often sloppily stated in a way that makes it sound as if parallel universes are literally, rather than figuratively, created.

That by itself doesn't rule out your point that maybe connections between "branches" could exist, though I believe the interpretation generally rules out that possibility.