Arrival time distributions and perfect absorption in classical and quantum
mechanics, J.G. Muga, J.P. Palao, C.R. Leavens, Physics Letters A 253
(1999) 21-27
Abstract. The most general expression defining the first passage time is given in terms of the absorption rate with perfectly absorbing conditions. Its operational use of quantum mechanics is discussed. In particular, in the quantum case an incompatibility is found with certain classical properties of the perfectly absorbing conditions.