In the canonical quantum gravity, Hamiltonian equal zero, why? Since the split is space, the time is a constant? or the space-time is Ricci-flat?(adsbygoogle = window.adsbygoogle || []).push({});

In other words, if the space-time is Ricci-flat whether time supersurface, Hamiltonian equal zero?

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Wheeler-Dewitt equation and canonical quantum gravity

**Physics Forums | Science Articles, Homework Help, Discussion**