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Grover's Quantum Search Algorithm for an Arbitrary Initial Amplitude Distribution | | Eli Biham
; Ofer Biham
; David Biron
; Markus Grassl
; Daniel A. Lidar
; | | Date: |
9 Jul 1998 | | Journal: | Phys.Rev. A60 (1999) 2742 | | Subject: | quant-ph | | Affiliation: | Technion, Haifa, Hebrew University, Jerusalem, Karlsruhe University, Germany, UC Berkeley | | Abstract: | Grover’s algorithm for quantum searching is generalized to deal with arbitrary initial complex amplitude distributions. First order linear difference equations are found for the time evolution of the amplitudes of the marked and unmarked states. These equations are solved exactly. New expressions are derived for the optimal time of measurement and the maximal probability of success. They are found to depend on the averages and variances of the initial amplitude distributions of the marked and unmarked states, but not on higher moments. Our results imply that Grover’s algorithm is robust against modest noise in the amplitude initialization procedure. | | Source: | arXiv, quant-ph/9807027 | | Services: | Forum | Review | PDF | Favorites | |
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