@article {1486, title = {Individual Addressing in Quantum Computation through Spatial Refocusing}, journal = {Physical Review A}, volume = {88}, year = {2013}, month = {2013/11/21}, abstract = { 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. }, doi = {10.1103/PhysRevA.88.052325}, url = {http://arxiv.org/abs/1305.2798v3}, author = {Chao Shen and Zhe-Xuan Gong and Luming Duan} }