Partition function (quantum field theory)

In quantum field theory, the partition function is the generating functional of all correlation functions, generalizing the characteristic function of probability theory. It is usually expressed by the following functional integral: where S is the action functional.

Partition function (quantum field theory)

In quantum field theory, the partition function is the generating functional of all correlation functions, generalizing the characteristic function of probability theory. It is usually expressed by the following functional integral: where S is the action functional.