Engineering Physics Annotation << Back Superluminal velocities and nonidentity of Schrodinger and Heisenberg representations in quantum electrodynamics Veklenko B.A. It is shown by consideration of single atom excitation by the radiation of nonstationery classical current the nonidentity of Schrodinger and Heisenberg representations in quantum electrodynamics. The definitions of the coherent and non-coherent channels of atom excitation are introduced. In coherent channel by definition the free photons are absent in space if they were absent before atom excitation. Such photons appear in non-coherent channel. It is shown that following Schrodinger representation each channel creates a positive payment to the total probability of atom excitation. The interference between channels is absent. The appearance of signals which velocities are larger than the velocity of light in vacuum follows from such fact. Vice versa the results obtained in Heisenberg representation suppose that the payment of non-coherent channel to total probability is negative. Such fact leads to the conclusion that the Heisenberg representation is noncorrect and this representation is nonequivalent to the Schrodinger one. The nonidentity of representations is explained by wrong definition of the operator performing the connection between representations. Key words: superluminal velocities, quantum electrodynamics, nonidentity of representations. Contacts: E-mail: veklenkoba@yandex.ru Pp. 03-09.