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COVER Photograph of a silicon chip (area of entire chip: 33 mm2) that levitates individual atoms. Static and radio frequency voltages are applied to the array of electrodes at the center, creating an electric confinement for individual atomic ions, which hover ~0.1 mm above the chip. Such trapped ion systems are a leading physical implementation for quantum information processing. See the special section beginning on page 1163. Photo: Curt Suplee and Emily Edwards, Joint Quantum Institute and University of Maryland; Chip fabrication: Sandia National Laboratories with support from the Intelligence Advanced Research Projects Activity$ F- D( h9 s; ]1 A5 y4 X% r3 y
8 M# X% I4 _" @) Q( l' a/ Y- k( k2 E' I! M* n& a+ ]4 F 作者: 懵懂干细胞 时间: 2013-3-9 09:45