Abstract:
For the Grover algorithm, we derive the exact formula of the norm of the amplitude in the marked state in a sine-function form and use this formula to derive the necessary and sufficient phase condition условие sinΔ≤|β|sinΔ≤|β| for this algorithm with arbitrary phase rotations. We show that the condition of identical rotation angles θ=ϕθ=ϕ, which is a special case of our condition, is a sufficient but not necessary phase condition.
Citation:
D. Li, X. Li, H. Huang, “Phase Condition for the Grover Algorithm”, TMF, 144:3 (2005), 472–483; Theoret. and Math. Phys., 144:3 (2005), 1279–1287
Li X., Li D., Huang H., Li X., “Fixed-Point Search With Two Arbitrary Equal Phase Shifts for Any Number of Iterations”, International Journal of Quantum Information, 8:7 (2010), 1075–1087
Dafa Li, “Quantum fixed-point search algorithm with general phase shifts”, Front. Comput. Sci. China, 2:2 (2008), 138
Li D, Chen JP, Li X, et al, “Performance of equal phase-shift search for one iteration”, European Physical Journal D, 45:2 (2007), 335–340
Li PC, Li SY, “Phase matching in Grover's algorithm”, Physics Letters A, 366:1–2 (2007), 42–46
Li DF, Li XR, Huang HT, et al, “Fixed-point quantum search for different phase shifts”, Physics Letters A, 362:4 (2007), 260–264