Orzalesi, C. A. Gauge field theories and the equivalence principle. (English) Zbl 0535.53057 Differential geometric methods in theoretical physics, Conf. Trieste 1981, 187-200 (1983). [For the entire collection see Zbl 0511.00022.] Following the works of Utiyama, Kibble and Sciama, it is often emphasized that general relativity can be based on a gauge principle, a fact which makes gravity theory similar to gauge theories of the Yang-Mills type. One of my purposes here is to reverse this emphasis, by showing that the theory of interacting gravitational and Yang-Mills fields originates from general relativity on a suitably ”extended” spacetime. Thus, as it happens with ordinary general relativity, also Yang-Mills gauge theories can be based on an equivalence principle, whereby the fundamental geometric origin of gauge theories becomes manifest. Cited in 1 Document MSC: 53C80 Applications of global differential geometry to the sciences 83D05 Relativistic gravitational theories other than Einstein’s, including asymmetric field theories 83E15 Kaluza-Klein and other higher-dimensional theories 83C99 General relativity Keywords:gauge principle; gauge theories; Yang-Mills fields; equivalence principle Citations:Zbl 0511.00022 PDFBibTeX XML