Abstract
A quantum algorithm for estimating the phase, which determines the eigenvalue of a unitary operator, is discussed. It is assumed that the eigenvector of this operator and the corresponding quantum circuit are given. The memory register where the approximate phase value is stored consists of n qubits, which makes it possible to determine the phase accurate to 2−n with the probability greater than 8/π2. By way of example, computations for the case of the quantum phase shift operator are performed. The simulation of the quantum algorithm and the computation of the eigenvalue are performed using the QuantumCircuit package written in the Wolfram Mathematica computer algebra system. This system is also used to perform all the computations and visualize the results.
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Original Russian Text © A.N. Prokopenya, 2015, published in Programmirovanie, 2015, Vol. 41, No. 2.
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Prokopenya, A.N. Simulation of a quantum algorithm for phase estimation. Program Comput Soft 41, 98–104 (2015). https://doi.org/10.1134/S0361768815020061
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DOI: https://doi.org/10.1134/S0361768815020061