2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/88931The previously proposed Heisenberg-type relation $ E_c t_c >> \hbar {\cal C}$ for the energy used by a quantum computer, the total computation time and the logical ("classical") complexity of the problem is verified for the following examples of quantum computations: preparation of the input state, two Hamiltonian versions of the Grover's algorithm, a model of "quantum telephone directory", a quantum-optical device factorizing numbers and the Shor's algorithm.4 pages, Revtex, no figuresQuantum Physicstext