"Q-BITS: Quantum computer called possible with today's tech"
Researchers at the University of Wisconsin in Madison claim to have created the world's first successful simulation of a quantum-computer architecture that uses existing silicon fabrication techniques. By harnessing both vertical and horizontal tunneling through dual top and bottom gates, the architecture lays out interacting, 50-nanometer-square, single-electron quantum dots across a chip.

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Story in EE Times: http://www.eet.com/at/news/OEG20020806S0030