An analogue of the Feynman–Kac formula for a high-order operator

In this paper, we construct a probabilistic approximation of the evolution operator $\exp\bigl(t\bigl({\frac{(-1)^{m+1}}{(2m)!}\,\frac{d^{2m}}{dx^{2m}}+V}\bigr)\bigr)$ in the form of expectations of functionals of a point random field. This approximation can be considered as a generalization of the Feynman–Kac formula to the case of a differential equation of order $2m$.