Abstract:
Quantum equation of motion for a particle in external field is written down in
the form of the integral equation of the Lippmann–Schwinger type, in which the
free solution term is replaced by the solution of the corresponding classical problem.
The iterations of the equation give quantum corrections to the classical solutions.
Citation:
Yu. M. Shirokov, “Perturbation theory with respect to Planck's constant”, TMF, 31:3 (1977), 327–332; Theoret. and Math. Phys., 31:3 (1977), 488–492