Experimental realization of a quantum algorithm

Isaac L. Chuang (), Lieven M. K. Vandersypen, Xinlan Zhou, Debbie W. Leung and Seth Lloyd
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Isaac L. Chuang: IBM Almaden Research Center
Lieven M. K. Vandersypen: Solid State and Photonics Laboratory, Stanford University
Xinlan Zhou: Solid State and Photonics Laboratory, Stanford University
Debbie W. Leung: Edward L. Ginzton Laboratory, Stanford University
Seth Lloyd: MIT Department of Mechanical Engineering

Nature, 1998, vol. 393, issue 6681, 143-146

Abstract: Abstract Quantum computers1,2,3,4,5 can in principle exploit quantum-mechanical effects to perform computations (such as factoring large numbers or searching an unsorted database) more rapidly than classical computers1,2,6,7,8. But noise, loss of coherence, and manufacturing problems make constructing large-scale quantum computers difficult9,10,11,12,13. Although ion traps and optical cavities offer promising experimental approaches14,15, no quantum algorithm has yet been implemented with these systems. Here we report the experimental realization of a quantum algorithm using a bulk nuclear magnetic resonance technique16,17,18, in which the nuclear spins act as ‘quantum bits’19. The nuclear spins are particularly suited to this role because of their natural isolation from the environment. Our simple quantum computer solves a purely mathematical problem in fewer steps than is possible classically, requiring fewer ‘function calls’ than a classical computer to determine the global properties of an unknown function.

Date: 1998
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DOI: 10.1038/30181

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