Scientists / Open questions

Gerardus 't Hooft

Quantum field theory; particle physics; quantum gravity

1999 Nobel Prize in Physics

5 questions

  1. Consistent completion of the conformal-factor-first formulation of canonical quantum gravity: resolving the divergent induced Weyl-squared effective action

  2. Explicit deterministic models with extensive energy, weak interactions, and interference in 't Hooft's deterministic quantum mechanics

  3. Open problems in 't Hooft's antipodal-identification framework for black hole unitarity: the ℓmax⁡(M)\ell_{\max}(M) cutoff, the Euclidean instanton's field content, the Rindler limit, and second-quantized horizon variables

  4. Completing the deterministic lattice reformulation of superstring theory: world-sheet continuum limit, emergent Lorentz invariance, state counting, and deterministic interactions

  5. Can pure Yang-Mills theory hide its gauge invariance? Dynamical mass generation without elementary scalar fields (the open core of 't Hooft, Nucl. Phys. B35 (1971) 167)

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