Both the magnetic depolarization of the spontaneous emission from self-aligned states and the discharge galvanic reaction are measured simultaneously in a magnetic field. The observed galvanic peak is ascribed to magnetic destruction of self-aligned ensembles of atoms. This presents galvanic manifestation of coherent conductivity.
Spontaneous emission may be regarded as a result of the radiation-reaction fields emitted by an atom acting back on the atom itself. It is commonly (and often implicitly) assumed that the frequencies of different transitions in the atom are sufficiently different that the field radiated by one dipole is not in near resonance with any other transition. The “secular assumption” is then made that the field couples back only on the same dipole that originally sent it. In this work we study spontaneous emission without making the secular approximation.
The steady state of a pair of isotopes resulting from the incoherent process of excitation-de-excitation and spontaneous decay is found. When the applied magnetic field corresponds to resonance between Zeeman sublevels in the pair, simultaneous spontaneous decay induces interatomic correlations. The resulting state belongs to the class of states with positive partial transpose. One consequence of the correlations is a redistribution of the probabilities for the directions of spontaneous emission at the resonant transition frequency.
The opto-galvanic response of some degenerate states of sputtered atoms to linearly- and circularly polarize light is studied. On the same optical transition both time-resolved- and amplitude opto-galvanic signals are found depending on the polarizations of light absorbed. The latter induces galvanic responses differing in opto-galvanic efficiency, time-evolution and sensitivity to discharge current and laser power. The differences are ascribed to the rate constants of the decay processes, characterizing aligned and oriented atoms.