It is believed that new types of computing machines will be constructed to exploit quantum mechanics for an exponential speed advantage in solving certain problems compared with classical computers 9.
Abstract Let A be an n × n Hermitian matrix and A = UΛUH be its spectral decomposition, where U is a unitary matrix of order n and Λ is a diagonal matrix. In this note we present the perturbation ...
Journal of the Society for Industrial and Applied Mathematics, Vol. 6, No. 1 (Mar., 1958), pp. 26-50 (25 pages) ...
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