Time of quantum information transfer from one atom qubit to another taking into account damping of quantum states

Abstract

The dynamics of the model quantum system consisting of two stationary identical two-level atoms, one of which is irradiated by a real photons field. The influence of states damping on the process of quantum information transfer between two atoms qubits at arbitrary distances is studied, taking into account the retarded dipole-dipole interaction of atoms. Under rather general assumptions, the system of non-stationary equations is obtained that describes the evolution of the amplitudes of possible states of the compound system “atomA(1) + atomA(2) + field” in symmetric and antisymmetric channels of interaction of an atom pair with the field of real photons. For the first time, the combined influence of retarded dipole-dipole interaction and state damping effects on the process of transmission of quantum information from one atom qubit to another at arbitrary interatomic distances is investigated.