= Partition function (quantum field theory)
{wiki=Partition_function_(quantum_field_theory)}
In quantum field theory (QFT), the partition function is a central concept that plays a role analogous to that in statistical mechanics. It encapsulates the statistical properties of a quantum system and is crucial for deriving various physical observables. \#\#\# Definition The partition function in QFT, often denoted as \\( Z \\), is defined as the functional integral over all possible field configurations of a given theory.
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