In QFT, the various fields, even the matter field, appear separately, each with its own equation and its own behavior. They are not combined into a single field as Einstein hoped, but they are related - members of the same family, so to speak. This theory, so little known or appreciated by the public, is the true fulfillment of Einstein's desire for a world made of fields and only fields.
( Rodney A. Brooks )
[ Fields of Color: The theory ]
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