Does String Theory tell us the size of Extra Dimensions.

Click For Summary
SUMMARY

The discussion centers on the limitations of string theory in determining the size of extra dimensions. Various models, including Calabi-Yau manifolds and branes, present differing perspectives on the nature of these dimensions, with some being compactified and others larger. The ADD model introduces the concept of large extra dimensions, but ultimately, string theory does not provide definitive answers regarding their size. Instead, it allows for a range of interpretations based on the specific parameters set by the researcher.

PREREQUISITES
  • Understanding of string theory fundamentals
  • Familiarity with Calabi-Yau manifolds
  • Knowledge of brane-world scenarios
  • Awareness of the ADD model of extra dimensions
NEXT STEPS
  • Research the implications of Calabi-Yau compactifications in string theory
  • Explore the characteristics and significance of brane-world models
  • Investigate the ADD model and its predictions for large extra dimensions
  • Study the mathematical frameworks used in string theory to analyze extra dimensions
USEFUL FOR

Physicists, cosmologists, and students of theoretical physics interested in the complexities of string theory and the implications of extra dimensions.

hankaaron
Messages
83
Reaction score
4
Does the math in string theory tell us anything about the size of any of the extra dimensions?
 
Physics news on Phys.org
no so much.

for one thing there are many models with varying 'extra dimensions'...sometimes
Calabi-Yau [which I think are small, 'compactified'] and other times branes [bigger] and sometimes a mix...Then there is an ADD model with large extra dimensions.

Some discussion on extra dimensions here:

http://en.wikipedia.org/wiki/String_theory#Extra_dimensionsedit: a discussion with some background...no precise answer...here:

https://www.physicsforums.com/showthread.php?t=421326

This discussion brings out some of the complexities in addressing your question
 
Last edited:
To a first approximation, string theory in its current form tells us nothing. Instead, you tell it what you want.
 

Similar threads

Undergrad What Shapes Can Extra Dimensions Take in String Theory?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate String theory and locality of small dimensions
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Why do dimensions curl up or expand?
  • · Replies 5 ·
Replies
5
Views
4K
Undergrad Trying To Conceptualize Two Dimensions Of Time
  • · Replies 2 ·
Replies
2
Views
5K
Graduate The Emergence of Space-time in String Theory
  • · Replies 33 ·
2
Replies
33
Views
9K
Graduate String Theory in N dimensions?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Brane cosmology without string theory?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Unifying string theory and loop quantum gravity
  • · Replies 2 ·
Replies
2
Views
5K
Undergrad String theory in 4 dimensions?
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad What is time in string/M-theory and Four-dimensionalism?
  • · Replies 1 ·
Replies
1
Views
3K