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Near-ground-state transport of trapped-ion qubits through a multidimensional array



Dietrich G. Leibfried, Rodney B. Blakestad, Christian Ospelkaus, Aaron Vandevender, Janus Wesenberg, Michael J. Biercuk, David J. Wineland


We have demonstrated transport of 9Be+ ions through a 2D Paul-trap X-junction array while maintaining the ions near the motional ground-state of their local potential well. We expand on the first report of the experiment in [1], including a detailed discussion of how the transport potentials were calculated. Two main mechanisms that caused motional excitation during transport are explained, along with the methods used to mitigate such excitation. We achieved a two-orders of magnitude decrease in the motional excitation over the results in [1]. The effect of a mu-metal shield on qubit coherence is also reported. Finally, we examine a method for exchanging energy between multiple motional modes on the few-quanta level, which could be useful for cooling motional modes without directly accessing the modes with lasers. These results establish that how trapped ions can be transported in a large-scale quantum processor with high fidelity.
Physical Review A


atomic ion, ion, ion trap, junction, ion transport trap array


Leibfried, D. , Blakestad, R. , Ospelkaus, C. , Vandevender, A. , Wesenberg, J. , Biercuk, M. and Wineland, D. (2011), Near-ground-state transport of trapped-ion qubits through a multidimensional array, Physical Review A, [online], (Accessed April 16, 2024)
Created September 8, 2011, Updated February 19, 2017