Zbigniew Haba

I shall discuss a change of variables in the functional integral in quantum field theory. I show that by means of a change of variables it is possible to derive a ground state. First, in simple models I check this option in the Hamiltonian framework. Then, I shall discuss gauge theories and gauge theories of gravity (McDowell-Mansouri). I show that an exponential of the Chern-Simons functional is the ground state. I suggest that this may also be a solution of the Wheeler-de Witt equation.