A Could Altering the Past Be Possible with Time Travel?

kb23455
Messages
1
Reaction score
0
If time travel were possible, could someone alter or set up the way they want things to happen before they went back to their desired destination?
 
Physics news on Phys.org
kb23455 said:
If time travel were possible
This is not an "if" that can be considered in the absence of a specific theoretical model. For example, in relativity, there are spacetimes that have closed timelike curves, which is what "time travel" means in that context, and you could formulate a scenario in one of those spacetimes (such as Godel spacetime)--but a question about that would go in the relativity forum, not this one.

In quantum physics, I'm not aware of any specific theoretical models of time travel. But that's what you would need to find in order to formulate your question in a way that can be (possibly) answered. Just sayihng "if time travel were possible" is not enough because that doesn't give us any theoretical model to work with, and without a theoretical model, it's impossible to make predictions in physics.

For now, I am closing this thread since we don't have a valid basis for discussion. If you can find a specific reference with a model that you want to use, you can PM me and I'll consider it, and reopen the thread if it looks like a valid scenario can be formulated using that model.
 
  • Like
Likes strangerep
I am not sure if this falls under classical physics or quantum physics or somewhere else (so feel free to put it in the right section), but is there any micro state of the universe one can think of which if evolved under the current laws of nature, inevitably results in outcomes such as a table levitating? That example is just a random one I decided to choose but I'm really asking about any event that would seem like a "miracle" to the ordinary person (i.e. any event that doesn't seem to...
Not an expert in QM. AFAIK, Schrödinger's equation is quite different from the classical wave equation. The former is an equation for the dynamics of the state of a (quantum?) system, the latter is an equation for the dynamics of a (classical) degree of freedom. As a matter of fact, Schrödinger's equation is first order in time derivatives, while the classical wave equation is second order. But, AFAIK, Schrödinger's equation is a wave equation; only its interpretation makes it non-classical...

Similar threads

Replies
10
Views
2K
Replies
10
Views
5K
Replies
11
Views
2K
Replies
8
Views
888
Replies
20
Views
2K
Replies
8
Views
2K
Replies
3
Views
2K
Back
Top