| | Ingeniare. Revista chilena de ingeniería, vol. 16 número especial, 2008, pp. 85-90 EINSTEIN EQUATIONS FOR TETRAD FIELDS ECUACIONES DE EINSTEIN PARA CAMPOS TETRADOS Héctor Torres-Silva1 1 RESUMEN Todo tensor métrico puede ser expresado por el producto interno de campos tetrados. Se prueba que las ecuaciones de Einstein para esos campos tienen la misma forma que el tensor electromagnético de momento-energía si la corriente externa total es igual a cero. Usando la teoría de campo unificado de Evans se muestra que la verdadera unificación de la gravedad y el electromagnetismo es con las ecuaciones de Maxwell sin fuentes. Palabras clave: Ecuaciones de Einstein, campos tetrados, tensor de momento-energía, geometría Riemann-Cartan, sistemas Einstein-Maxwell. ABSTRACT Every metric tensor can be expressed by the inner product of tetrad fields. We prove that Einstein's equations for these fields have the same form as the stress-energy tensor of electromagnetism if the total external current . Using the Evans' unified field theory, we show that the true unification of gravity and electromagnetism is with source-free Maxwell equations.
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