String theory vs Quantum field theory

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SUMMARY

String theory posits that strings are the fundamental building blocks of the universe, while Quantum Field Theory (QFT) treats particles as excitations of underlying quantum fields. The discussion clarifies that string theory does not completely negate QFT; instead, it maintains that QFT remains a valid effective theory within its own domain. The relationship between the two theories is complex, with string theory suggesting that QFT can coexist as an approximation of a deeper string-based framework.

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  • Understanding of Quantum Field Theory (QFT)
  • Familiarity with string theory concepts
  • Basic knowledge of particle physics
  • Awareness of theoretical physics frameworks
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  • Research the implications of string theory on particle physics
  • Study the mathematical foundations of Quantum Field Theory
  • Explore the concept of effective field theories in physics
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Theoretical physicists, students of advanced physics, and anyone interested in the foundational aspects of modern physics, particularly in understanding the relationship between string theory and Quantum Field Theory.

KleinMoretti
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what does it mean for QFT if string theory turns out to be correct?
So QFT treats particles as excitations of their underlying quantum field, meaning that fields are more fundamental than particles. Then String theory comes in and says that actually strings are the fundamental building block of the universe and that the different particles are vibrating strings. Do the 2 theories really contradict each other or am I misunderstanding something, like what happens to the quantum field of QFT in string theory, are they completely gone or do they have a place in the theory?
 
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According to string theory, QFT is still valid as an effective approximate theory.
 
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