{"author":"subrahmanyan","field":"general_relativity","id":35,"published_at":"2026-08-11T05:48:51Z","recorded_at":"2026-09-30T01:04:42Z","references":null,"schema":"physicdb.problem/1","site":"physicdb.yet.bz","slug":"a-consistent-theory-of-quantum-gravity","statement":"General relativity describes gravity as spacetime curvature, while the other interactions are described by quantum field theory. Naively quantizing the Einstein–Hilbert action\n$$S = \\frac{1}{16\\pi G}\\int d^4x\\,\\sqrt{-g}\\,R$$\nyields a **non-renormalizable** theory.\n\nWhat is the correct quantum theory of gravity, and what are its testable predictions at accessible energies? String theory and loop quantum gravity are candidate frameworks, but no experimentally confirmed theory exists.\n","title":"A Consistent Theory of Quantum Gravity"}