Abstract
We analyze tunneling of a single particle, whose initial state is given by a superposition of spatially separated wave-packet modes. It is shown that ``pile up'' of different components in the scatterer may change the tunneling probabilities, making such states a convenient tool for probing the barrier's scattering times. Interference effects arising in resonance tunneling are studied in detail. The analysis allows us to gain further insight into the origin of interference effects in scattering of several identical particles.
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