Scattering theory traditionally deals with the asymptotic behavior of a system far removed from the actual scattering event. Here we present an experimental study of the one-dimensional scattering of a noninteracting condensate of 87Rb atoms from a potential barrier in the nonasymptotic regime for which the collision dynamics are still ongoing. We show that, for near-transparent barriers, there are two distinct transient scattering effects that arise and dramatically change the momentum distribution during the collision: a deceleration of wave-packet components in midcollision and an interference between incident and transmitted portions of the wave packet. Both effects lead to the re-distribution of momenta giving rise to a rich interference pattern that can be used to reconstruct the single-particle phase profile.
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|State||Published - 26 Nov 2013|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics