An improved phase error tolerance in Quantum search algorithm

Details An improved phase error tolerance in Quantum search algorithm An improved phase error tolerance in Quantum search algorithm

2002-09-11

arxiv.org/abs/quant-ph/0209073v5

Chinese Journal of Physics, v. 42, no. 5, 585 (2004)

Physics

Quantum Physics

5 pages, 2 figures

Scientific paper

As the matching condition in Grover search algorithm is transgressed due to inevitable errors in phase inversions, it gives a reduction in maximum probability of success. With a given degree of maximum success, we have derive the generalized and imroved criterion for tolerated error and corresponding size of quantum database under the inevitable gate imperfections. The vanished inaccurancy to this condition has also been shown. Besides, a concise formula for evaluating minimum number of iterations is also presented in this work.

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