• Source: Composite gravity

In theoretical physics, composite gravity refers to models that attempted to derive general relativity in a framework where the graviton is constructed as a composite bound state of more elementary particles, usually fermions. A theorem by Steven Weinberg and Edward Witten shows that this is not possible in Lorentz covariant theories: massless particles with spin greater than one are forbidden. The AdS/CFT correspondence may be viewed as a loophole in their argument. However, in this case not only the graviton is emergent; a whole spacetime dimension is emergent, too.




See also


Weinberg–Witten theorem




References

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• NATO 120x570mm
• Composite gravity
• Gravity
• Euclidean quantum gravity
• Quantum gravity
• Alternatives to general relativity
• Retaining wall
• Gravity dam
• Newton's law of universal gravitation
• Induced gravity
• Loop quantum gravity