Experimental approaches to implementing ideas from quantum information science focus on developing well-understood physical systems that have only a few quantum bits. I will discuss potential applications of these quantum sys-tems, including high-resolution magnetic field sensing and simulating quantum mechanical models from condensed matter physics. By relying upon proven technologies, we can take full advantage of the tremendous experimental ad-vances in preparing, controlling, and measuring isolated mesoscopic and atomic systems made over the past decade.
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