On the mixing of two bound and unbound levels: Energy repulsion and width attraction
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Influence of impurity on the rate of single photon superradiance and photon transport in disordered N qubit chain
2019, Physica E: Low-Dimensional Systems and NanostructuresCitation Excerpt :If we mix two unbound states the resulting complex energies (resonances) of a superposition state show a very complicated behavior. Both the resonances' energies and their width may exhibit crossing or anticrossing which depends on the explicit form of off-diagonal interaction in non- Hermitian Hamiltonian matrix [14–16]. We show that the real and the imaginary parts of E± never cross, however, for some parameters which we specify below, the energies ɛ+, ɛ−, and the widths γ+, γ− can merge together (see Figs. 3 and 4).
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