Time Travel - Does It Create a New Dimension?

In summary, the conversation discusses the concept of time travel and the potential consequences of changing the past. The experts state that time travel is not currently possible and any discussion of it is not within the scope of physics. The idea of time travel creating paradoxes is seen as a sign that it is not physically possible. The experts also mention the Novikov self-consistency principle, which suggests that any changes made in the past would not affect the present. Overall, the experts do not provide a clear answer to the question of whether or not our world would be affected by changing the past through time travel.
  • #1
TachyonRSC
3
0
Hello and first of all I would like to say that I appreciate your work here since I am new to this forum. So here it goes. I was wondering for a long time. Someone travels back in time somehow and let's say he goes 1000 years back. He knows the future and he makes an action to change it. Our world and our present will not be affected right? So when he traveled back in time he went to an alternate time line? Did he create that time line or dimension? Or our world will really be affected? And what about those paradoxes? I would really appreciate an educated answer. Thanks a lot!
 
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  • #2
No. That's just silly science fiction stuff. The term "dimension" isn't used this way in physics. The only kind of time travel that is remotely plausible in real physics is closed timelike curves. These, if they exist, keep any traveler in the same universe.
 
  • #3
And if that traveller does something that will change the future then what happens to us in the present?
 
  • #5
I believe that will do the job. For any questions I will reply again. Thanks a lot.
 
  • #6
The very fact that the idea of time travel can result in logical paradoxes is a big red warning sign that it's likely not physically possible - unless the Universe simply 'doesn't allow paradoxes to happen', but that I think is an assumption too far.
 
  • #7
TachyonRSC said:
I was wondering for a long time. Someone travels back in time somehow and let's say he goes 1000 years back. He knows the future and he makes an action to change it. Our world and our present will not be affected right?

We have absolutely no idea. Time travel is not possible as far as we know, so there's no way to answer your question. Since time travel violates physics, it is not a valid subject for discussion here on PF. Thread locked.
 

FAQ: Time Travel - Does It Create a New Dimension?

What is time travel and how does it work?

Time travel is the concept of moving between different points in time. It is often portrayed in science fiction as using a device or technology to travel through time. The exact mechanism of time travel is still a subject of debate and speculation, but some theories suggest bending space-time or using wormholes to achieve it.

Can time travel create a new dimension?

There is no scientific evidence to suggest that time travel can create a new dimension. The concept of dimensions is often used in physics to refer to different aspects of reality, such as length, width, and time. Time travel does not necessarily create a new dimension, but it may allow for movement along the time dimension.

Is time travel possible?

As of now, time travel is only possible in theory. We have not yet developed the technology or understanding to actually travel through time. However, some physicists believe that time travel may be possible in the future with advancements in technology and a better understanding of the laws of physics.

What are the potential consequences of time travel?

The potential consequences of time travel are largely unknown, as it is currently only a theoretical concept. Some theories suggest that changing the past through time travel could have ripple effects on the present and future, potentially creating paradoxes. However, until time travel is actually achieved, we cannot definitively determine its consequences.

Can time travel be used to change history?

This is a subject of much debate and speculation. Some theories suggest that changing events in the past through time travel would create a parallel universe, while others argue that the timeline would simply be altered. It is currently impossible to say for certain whether time travel could be used to change history, as we have not yet achieved it in reality.

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