Unify General Relativity & Quantum Theory | Stephen Hawking

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SUMMARY

The discussion centers on the unification of general relativity and quantum theory, specifically addressing the concept of Quantum Gravity. Participants highlight that gravity cannot be quantized like the other three fundamental forces: the Strong Nuclear Force, the Weak Nuclear Force, and Electromagnetism. Theories such as String Theory and Loop Quantum Gravity are mentioned as potential frameworks, although their validity remains speculative. Achieving a unified theory could lead to the long-sought "theory of everything."

PREREQUISITES
  • Understanding of general relativity and its principles
  • Familiarity with quantum mechanics and its fundamental concepts
  • Knowledge of String Theory and Loop Quantum Gravity
  • Basic grasp of the four fundamental forces in physics
NEXT STEPS
  • Research Quantum Gravity and its implications in modern physics
  • Study String Theory and its role in unifying fundamental forces
  • Explore Loop Quantum Gravity and its theoretical framework
  • Read "A Brief History of Time" by Stephen Hawking for foundational insights
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Physicists, students of theoretical physics, and anyone interested in the fundamental questions of the universe and the quest for a unified theory.

ISamson
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Hello,
I have read somewhere that the next major step in physics will be unifying general relativity with the quantum theory. Does anyone know about such? I wanted to know a bit more.
I have read about such in the book by Stephen Hawking "A Brief History of Time".
Thanks,
I.

P.S. My apologies for the wrong prefix.
 
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Ivan Samsonov said:
Does anyone know about such?
I think almost everyone in this forum knows about that.

The problem you're talking about is the most famous in modern physics. It's not Quantum Theory of Relativity, but rather Quantum Gravity, though no one really knows whether that is the right way to unify both fields. The idea is that gravity cannot be quantized, and thus it's different from the other 3 forces (Strong/Weak Nuclear force and Electromagnetism). There is String Theory and Quantum loop theory among many others. There is a lot of speculation in all this theories, and we still don't know if there is such theory exists. If that problem is solved, we may have achieved the "theory of everything".
 
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