John Wheeler is also a co-father of the Wheeler-DeWitt equation, the vanishing Hamiltonian constraint applied to the “wave function of the Universe” in quantum gravity that is expected to replace the equations of motion as soon as it is properly formulated. The Hartle-Hawking wave function remains the most famous solution of the WDW equation.

— John Wheeler: 1911-2008

— Lubos Motl

2012.08.11 Saturday ACHK