TY - JOUR
T1 - Observation of transient momentum-space interference during scattering of a condensate from an optical barrier
AU - Chang, Rockson
AU - Potnis, Shreyas
AU - Ellenor, Christopher W.
AU - Siercke, Mirco
AU - Hayat, Alex
AU - Steinberg, Aephraim M.
PY - 2013/11/26
Y1 - 2013/11/26
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84890424308&partnerID=8YFLogxK
U2 - https://doi.org/10.1103/PhysRevA.88.053634
DO - https://doi.org/10.1103/PhysRevA.88.053634
M3 - مقالة
SN - 1050-2947
VL - 88
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 5
M1 - 053634
ER -