TY - JOUR T1 - Individual Addressing in Quantum Computation through Spatial Refocusing JF - Physical Review A Y1 - 2013 A1 - Chao Shen A1 - Zhe-Xuan Gong A1 - Luming Duan AB - Separate addressing of individual qubits is a challenging requirement for scalable quantum computation, and crosstalk between operations on neighboring qubits remains as a significant source of noise for current experimental implementation of multi-qubit platforms. We propose a scheme based on spatial refocusing from interference of several coherent laser beams to significantly reduce the crosstalk noise for any type of quantum gates. A general framework is developed for the spatial refocusing technique, in particular with practical Gaussian beams, and we show under typical experimental conditions, the crosstalk-induced infidelity of quantum gates can be reduced by several orders of magnitude with a moderate cost of a few correction laser beams. VL - 88 UR - http://arxiv.org/abs/1305.2798v3 CP - 5 J1 - Phys. Rev. A U5 - 10.1103/PhysRevA.88.052325 ER -