Southwest Quantum Information and Technology

Fast Transport of a Trapped Bose-Einstein Condensate Using Counterdiabatic Driving

Presenting Author: John Holt, Miami University
Contributing Author(s): Chris Larson, Edward Carlo Samson

We present an analysis of fast, coherent transport of a trapped interacting Bose-Einstein condensate (BEC) through three-dimensional (3D) numerical simulations by solving the time-dependent Gross Pitaevskii equation (GPE). A counterdiabatic driving (CD) protocol was used in order to achieve fast transport with a high quantum fidelity outcome. The trapping and CD potentials in the simulations were modeled as painted potentials, and the effects of the optical intensity of the painting beam was studied. By varying the transport time, our results show that a decrease in quantum fidelity is due primarily to either atom loss or center-of-mass (COM) oscillations. At longer (shorter) transport times, COM oscillations (atom loss) is the primary mechanism for decoherence, and the boundary between these two regimes is affected by the optical intensity of the painting beam. We also present comparisons to a constant acceleration protocol, and the robustness of CD driving from other decoherence mechanisms related to the trap depth.

(Session 5 : Thursday from 5:00 pm - 7:00 pm)