= Path-ordering
{wiki=Path-ordering}
Path-ordering is a concept used primarily in the context of quantum field theory and the mathematical formulation of quantum mechanics. It is particularly relevant in the computation of correlation functions and in the development of techniques like perturbation theory. In quantum field theory, when dealing with time-dependent operators, the need arises to define the order in which these operators act because the non-commutativity of operators can lead to different results depending on their order. Path-ordering provides a systematic way to handle this issue.
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