Why same object but different space can't be touch?

[Chitose]

Hello, Chitose wonder chick again.

I watch serval sci-fi movie and some of It say about theory about same matter in different time.
like... If I traval back in time and meet myself in the past, I must not touch him. If I do, it will cause some chaos.

I wonder why?

I know It pure fantasy but It must base on some actual theory right?

can anyone tell me?

..........

PS. English is not my native language, forgive me If I wrong in gramma or spelling.

 

[atyy]

I believe JesseM is the resident expert, but he's on vacation this weekend, and usually works in the SR and GR forum.

 

[DaveC426913]

like... If I traval back in time and meet myself in the past, I must not touch him. If I do, it will cause some chaos.

I wonder why?

I know It pure fantasy but It must base on some actual theory right?

Nope. It is total fiction. Nothing more than a plot device.

 

[atyy]

Yeah, you can touch yourself if you go back in time. But don't murder your grandfather before your father was born!

http://arxiv.org/abs/gr-qc/0206078
Time, Closed Timelike Curves and Causality
Francisco Lobo, Paulo Crawford

 

[Chitose]

I though It's about same electromanatic pules to suck each other or some thing like that...

So it's just a plot huh.

Too bad

 

[Pattonias]

Yeah, you can touch yourself if you go back in time. But don't murder your grandfather before your father was born!

http://arxiv.org/abs/gr-qc/0206078
Time, Closed Timelike Curves and Causality
Francisco Lobo, Paulo Crawford

Unless you were supposed to, then by all means don't not do it!