| gauge theory | Planck | correct or incorrect with caveats | | Any physical system, such as an atom, may be viewed as existing as a combination of its possible states, each of which has a certain probability. | elementary particles | certain quantities (e.g. energy, angular momentum, light) can only exist in certain discrete amounts, called quanta. | a field of research | or reasearch group | relativistic invariance | quantum fields are the ultimate reality and particles are merely the localized quanta of these fields. | quantum theory | or a range of dates for which the theory was active | quantum field theory | |
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