An Overview About Quantum TGD

Abstract

This chapter provides a summary about various approaches to quantum TGD. The discussions are based on the general vision that quantum states of the Universe correspond to the modes of classical spinor fields in the "world of the classical worlds" identified as the infinite-dimensional configuration space of 3-surfaces of H=M^4\times CP_2 (more or less-equivalently, the corresponding 4-surfaces defining generalized Bohr orbits).