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The 19 pages that link to Path integral formulation, each with the reason it gives.

• Richard FeynmanRelated: Feynman developed this formulation into a central route to quantum theory.

• Feynman diagramRelated: Feynman’s diagrammatic expansion arose alongside his path-integral approach.

• Dirac delta functionRelated: Delta constraints enforce fixed values or boundary conditions inside functional integrals.

• Lattice QCDRelated: Lattice expectation values arise from a discretized QCD path integral.

• Action (physics)Related: Each path contributes with a phase determined by its action.

• Double-slit experimentRelated: It describes the two alternatives as contributions to one detection amplitude.

• Correspondence principleRelated: In the classical limit, stationary-action paths dominate its contributions.

• Gaussian integralRelated: Gaussian functional integrals provide exactly solvable reference cases for quantum fluctuations.

• Feynman–Kac formulaRelated: The analogy between path integrals and weighted Brownian expectations illuminates the formula's origins.

• Faddeev–Popov ghostRelated: The Faddeev–Popov determinant enters when the path integral is gauge fixed.

• Quantum foamRelated: Summing over geometries offers a formal route to pictures of fluctuating spacetime.

• Field and string theory models and techniquesRelated: It provides a common route to calculations in both field theory and string theory.

• Joule-secondRelated: The action is divided by Planck's constant in the phase factor.