Time in String Theory: Directionality of Time

In summary, the conversation discusses the concept of time in string theory and whether it allows for multiple directions or if it is asymmetric. The conclusion is that string theory does not differ from the ordinary theory of relativity in regards to the direction of time. The question of whether the bulk, a higher dimensional space, has time and how many dimensions it has is also raised.
  • #1
Gear300
1,213
9
Does string theory imply time as a dimension that can run in more than one direction or is it asymmetric?
 
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  • #2
What does it mean for time to "run in more than one direction" or for it to be "asymmetric"? When you're not using the technical terminology of a subject (for whatever reason), you must say precisely what you mean by the words you use; otherwise you're not communicating anything.
 
  • #3
I'm not too sure of the technical terms...but what I'm asking is if String Theory assumes time just like the other spatial dimensions --- does the theory mandate that time flows in one direction (in our experience, we usually don't see time running in any other direction other than forwards)?
 
  • #4
In this respect, string theory does not differ from ordinary theory of relativity. If you know the answer to your question in ordinary relativity, the answer in string theory is the same.

You probably ask about the direction of the arrow of time. This arrow has one direction only.
 
  • #5
May be the question was: if our 3+1 space is a subset of BULK, a brane in a higher dimensional space, then what's about the time in the BULK? Does BULK has time, and if yes, then how many time dimensions?
 
  • #6
Dmitry67 said:
May be the question was: if our 3+1 space is a subset of BULK, a brane in a higher dimensional space, then what's about the time in the BULK? Does BULK has time, and if yes, then how many time dimensions?

You answered my question well in the previous post...but that would also be another question to point out.
 

1. What is the concept of time in string theory?

In string theory, time is considered to be a fundamental dimension that is intertwined with space. It is viewed as a continuous and linear progression, rather than a constant and unchanging entity.

2. Is time directionality important in string theory?

Yes, time directionality plays a crucial role in string theory. According to the theory, time can only move in one direction, from the past to the future. This is known as the arrow of time and is essential for understanding the behavior of particles and energy.

3. How does string theory explain the directionality of time?

String theory suggests that the directionality of time is a result of the universe's expansion. As the universe expands, particles and energy are pushed forward in time, creating the arrow of time. This is known as the thermodynamic arrow of time.

4. Can time travel be possible in string theory?

String theory does not rule out the possibility of time travel, but it does impose certain limitations. Time travel to the past is not possible as it would violate the arrow of time. However, time travel to the future may be feasible through the manipulation of space-time using advanced technology.

5. How does the directionality of time impact string theory's predictions?

The directionality of time is a crucial factor in string theory's predictions. The theory makes different predictions depending on the direction of time, and these predictions have been confirmed by various experiments and observations. The directionality of time also plays a role in understanding the behavior of particles and energy in the universe.

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