Gravitational Gauge Fields
In spite of the experimental success of Einstein’s classical theory of gravity — general relativity — the theory leaves much to be desired if we examine it from the viewpoint of fundamental quantum field theory. One problem is that the theory is not renormalizable if coupled to matter. Another problem is that the Euclidean action is not bounded from below for arbitrary metrics and consequently, the functional path integral is not well defined. Furthermore, there is the puzzle of why the cosmological term is zero or near zero in our universe — a fact that deserves a fundamental explanation.
KeywordsGauge Theory Gauge Field Planck Mass Base Manifold Cosmological Term
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