How Much Time Does a Tunneling Particle Spend in the Barrier Region?
How Much Time Does a Tunneling Particle Spend in the Barrier Region?
The question in the title may be answered by considering the outcome of a ``weak measurement'' in the sense of Aharonov et al. Various properties of the resulting time are discussed, including its close relation to the Larmor times. It is a universal description of a broad class of measurement …