:"A field theory is any [[theory]] in physics which describes a [[fundamental interaction]] in terms of a [[field]] that mediates that interaction. In an abstract field theory, a particle interacts in some way with a field, and then the field in turn interacts with another particle, thereby transferring some quantity ([[momentum]], [[energy]] or [[charge]], for instance) from one particle to another. Abstract field theories are considered obsolete in [[modern physics]], and have been replaced with [[metric theory|metric theories]] and gauge-invariant [[quantum field theory|quantum field theories]]." --[[User:KSorenson|KSorenson]] 22:11, 15 November 2009 (EST) | :"A field theory is any [[theory]] in physics which describes a [[fundamental interaction]] in terms of a [[field]] that mediates that interaction. In an abstract field theory, a particle interacts in some way with a field, and then the field in turn interacts with another particle, thereby transferring some quantity ([[momentum]], [[energy]] or [[charge]], for instance) from one particle to another. Abstract field theories are considered obsolete in [[modern physics]], and have been replaced with [[metric theory|metric theories]] and gauge-invariant [[quantum field theory|quantum field theories]]." --[[User:KSorenson|KSorenson]] 22:11, 15 November 2009 (EST) |