Phase Locking between Different Partial Waves in Atom-Ion Spin-Exchange Collisions.

摘要: We present a joint experimental and theoretical study of spin dynamics single ^{88}Sr^{+} ion colliding with an ultracold cloud Rb atoms in various hyperfine states. While exchange between the two species occurs after 9.1(6) Langevin collisions on average, relaxation Sr^{+} Zeeman qubit 48(7) collisions, which is significantly slower than previously studied systems due to small second-order spin-orbit coupling. Furthermore, reduction endothermic spin-exchange rate observed as magnetic field increased. Interestingly, we find that while phases acquired when singlet triplet potentials vary largely different partial waves, singlet-triplet phase difference, determines cross section, remains locked value over wide range leads quantum interference effects.