TY - JOUR
T1 - Bose-Bose mixtures in reduced dimensions
AU - Minardi, F.
AU - Barontini, Giovanni
AU - Catani, J.
AU - Lamporesi, G.
AU - Nishida, Y.
AU - Inguscio, M.
PY - 2011
Y1 - 2011
N2 - The two-body scattering is greatly modified in reduced dimensions. With ultracold atoms, low dimensional configurations are routinely accessible thanks to the use of optical lattices which allow confinements sufficiently strong to freeze the motion along chosen directions. With two different atomic species, we use a species-selective optical potential, in the form of a standing wave, to confine only one species in 2D disks and study the scattering between particles existing in different dimensions, i.e., we realize a 2D-3D mix-dimensional configuration, reminiscent of a brane world. We review the scattering theory specific to this configuration and derive an effective scattering length αeff in terms of the free-space scattering length α and the confinement parameters. We detect experimentally the enhancement of inelastic collisions arising at particular values of α and relate these values to the divergences of αeff. Unlike the confinement-induced resonances predicted and observed for identical particles, our mixed-dimensional resonances occur in a series of several resonances, because the relative and centre-of-mass motion are coupled.
AB - The two-body scattering is greatly modified in reduced dimensions. With ultracold atoms, low dimensional configurations are routinely accessible thanks to the use of optical lattices which allow confinements sufficiently strong to freeze the motion along chosen directions. With two different atomic species, we use a species-selective optical potential, in the form of a standing wave, to confine only one species in 2D disks and study the scattering between particles existing in different dimensions, i.e., we realize a 2D-3D mix-dimensional configuration, reminiscent of a brane world. We review the scattering theory specific to this configuration and derive an effective scattering length αeff in terms of the free-space scattering length α and the confinement parameters. We detect experimentally the enhancement of inelastic collisions arising at particular values of α and relate these values to the divergences of αeff. Unlike the confinement-induced resonances predicted and observed for identical particles, our mixed-dimensional resonances occur in a series of several resonances, because the relative and centre-of-mass motion are coupled.
UR - http://www.scopus.com/inward/record.url?scp=79952016466&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/264/1/012016
DO - 10.1088/1742-6596/264/1/012016
M3 - Article
AN - SCOPUS:79952016466
SN - 1742-6588
VL - 264
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012016
ER -