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We describe a computational investigation of tunneling at finite energy in aweakly coupled quantum mechanical system with two degrees of freedom. Wecompare a full quantum mechanical analysis to the results obtained by makinguse of a semiclassical technique developed in the context of instanton-liketransitions in quantum field theory. This latter technique is based on ananalytic continuation of the degrees of freedom into a complex phase space, andthe simultaneous analytic continuation of the equations of motion into thecomplex time plane.Comment: 33 pages, 8 figures, latex with graphic

Semiclassical description of tunneling in scattering with multiple degrees of freedom