Study of the autoionising states of the hydrogen atom in intense magnetic fields by the complex coordinate coupled-channel formalism

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Abstract
The study of autoionising resonances of a hydrogen atom in intense magnetic fields is formulated as a complex coordinate coupled-channel problem by designating each channel by a Landau quantum number which characterises a set of Coulomb levels below its continuum threshold. For magnetic fields in the range of 4.70*109 to 1.175*1012 G, the authors have calculated the positions and widths of several autoionising resonances below the first two excited Landau thresholds.