Graviton exchange for two freely propagating particle:solution String theory?

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SUMMARY

The discussion centers on the resolution of divergences in quantum field theory through the lens of String Theory, specifically in the context of graviton exchanges between two freely propagating particles. The divergence issues arise from calculations involving one and two graviton exchanges, particularly at arbitrary energies. String Theory, as referenced by Polchinski, posits that fundamental particles are represented as one-dimensional strings, which effectively mitigates these divergences by providing a more consistent framework for particle interactions. This approach is recognized as a significant advancement in theoretical physics.

PREREQUISITES
  • Understanding of Feynman diagrams and their role in quantum field theory.
  • Familiarity with the concept of graviton exchanges in particle physics.
  • Basic knowledge of String Theory and its fundamental principles.
  • Awareness of mathematical divergences in quantum mechanics.
NEXT STEPS
  • Research the mathematical framework of String Theory as outlined by Joseph Polchinski.
  • Study the implications of one-dimensional strings on particle interactions and divergences.
  • Explore the role of Feynman diagrams in quantum field theory in greater depth.
  • Investigate alternative theories addressing divergences in quantum mechanics, such as loop quantum gravity.
USEFUL FOR

The discussion is beneficial for theoretical physicists, graduate students in physics, and researchers interested in advanced topics in quantum field theory and String Theory.

moriheru
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Consider the feynman diagramms for two freely propagating particles...Correction from one graviton exchange.
Correction from two graviton exchange.The problem at hand is the divergence (of the math) at arbitary energys and each additional graviton exchange. So there are several resoultions and one seems to be String theory. My question is how does string theory solve this? I understand that String theory represents things (this is precision) as 1-d strings, but how does that resolve the divergence?
I believe this is a well know concept, so I hope not to fidle with the mathematics. I know that this is a messy and rough description. I am referring to Polchinski. Thanks for any help!
 
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Thanks for the post! Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
 

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