Performance of Equal Phase-Shift Search for One Iteration
D. Li, J. P. Chen, X. Li, H. Huang, X. Li
Abstract
Grover presented the phase-shift search by replacing the selective inversions by selective phase shifts of π/3. In this paper, we investigate the phase-shift search with general equal phase shifts. We show that for small uncertainties, the failure probability of the Phase-π/3 search is smaller than the general phase-shift search and for large uncertainties, the success probability of the large phase-shift search is larger than the Phase-π/3 search. Therefore, the large phase-shift search is suitable for large-size of databases.
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