“…The question of the time spent by a particle in a given region of space is not new and has recently attracted a great deal of interest [4,5,6,7,8,9,10,11,12,13,14,15,16]. The problem has been approached from many different points of view, and there exists a huge literature on the tunneling problem of electrons through a barrier, although tunneling times have continued to be controversial even until now.…”