Spin-Orbit Interactions and Quantum Spin Dynamics in Cold Ion-Atom Collisions.

摘要: We present accurate ab initio and quantum scattering calculations on a prototypical hybrid ion-atom system ${\mathrm{Yb}}^{+}$-Rb, recently suggested as promising candidate for the experimental study of open systems, information processing, simulation. identify second-order spin-orbit (SO) interaction dominant source hyperfine relaxation in cold ${\mathrm{Yb}}^{+}$-Rb collisions. Our results are good agreement with recent observations [L. Ratschbacher et al., Phys. Rev. Lett. 110, 160402 (2013)] rates trapped ${\mathrm{Yb}}^{+}$ immersed an ultracold Rb gas. The calculated 4 times smaller than is predicted by Langevin capture theory display weak ${T}^{\ensuremath{-}0.3}$ temperature dependence, indicating significant deviations from statistical behavior. analysis underscores deleterious nature SO implies that light combinations such ${\mathrm{Yb}}^{+}$-Li should be used to minimize decoherence ions atomic gases.