Journal
PHYSICAL REVIEW A
Volume 81, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.81.022308
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Funding
- National Nature Science Foundation of China [10975124]
- Ministry of Education of PRC, Chinese Academy of Sciences, National Fundamental Research Program [2007CB925200]
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An important quantum search algorithm based on the quantum random walk performs an oracle search on a database of N items with O(root phN) calls, yielding a speedup similar to the Grover quantum search algorithm. The algorithm was implemented on a quantum information processor of three-qubit liquid-crystal nuclear magnetic resonance (NMR) in the case of finding 1 out of 4, and the diagonal elements' tomography of all the final density matrices was completed with comprehensible one-dimensional NMR spectra. The experimental results agree well with the theoretical predictions.
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