what is path integral
Path integral may refer to: 1  Line integral, the integral of a function along a curve. 2  Functional integration, the integral of a functional over a space of curves. 3  Path integral formulation of quantum mechanics using functional integration, due to Richard Feynman.
Path Integrals. PathintegralswereinventedbyFeynman(whileagraduatestudent!) asanalternative. formulation of quantum mechanics. Our goal in this chapter is to show that quantum. mechanics and quantum ï¬eld theory can be completely reformulated in terms of. path integrals. The path integral formulation is particularly useful for quantum ï¬eld.