J. Masoliver et al., ABSORBING BOUNDARY-CONDITIONS FOR INERTIAL RANDOM-PROCESSES, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 54(6), 1996, pp. 6966-6968
A recent paper by J. Heinrichs [Phys. Rev. E 48, 2397 (1993)] presents
analytic expressions for the first-passage times and the survival pro
bability for a particle moving in afield of random correlated forces.
We believe that the analysis there is flawed due to an improper use of
boundary conditions. We compare that result, in the white noise limit
, with the known exact expression of the mean exit time.