Experimental realization of a fetching algorithm in a 7 qubit NMR quantum computer

Details Experimental realization of a fetching algorithm in a 7 qubit NMR quantum computer Experimental realization of a fetching algorithm in a 7 qubit NMR quantum computer

2002-07-15

arxiv.org/abs/quant-ph/0207079v1

J. Chem.Phys. 119, 8473-8481 (2003)

Physics

Quantum Physics

13 pages, 3 figures. Comments and criticism are welcome

Scientific paper

10.1063/1.1611177

Searching for marked items from an unsorted database is an important scientific problem and a benchmark for computing devices as well. Using a 7-qubit liquid NMR quantum computer, we have demonstrated successfully an hybrid quantum fetching algorithm that finds marked items using only a single query. The essential idea is the operation of quantum computers in parallel. We gave the detailed pulse sequence for coherent control of the 7 qubits. The pulse sequence demonstrated here is not only useful for ensemble quantum computation, but also can be regarded as a general purpose control-gate which is useful for experimental design of quantum algorithms and general quantum information processing task in other quantum computer schemes. A generalization of the algorithm that is scalable to arbitrary qubit number is also provided.

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