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Quasibound states at thresholds in multichannel impurity scattering
2003
Journal of Physics A: Mathematical and General
We investigate the threshold behavior of transmission resonances and quasibound states in the multichannel scattering problems of a one dimensional (1D) time-dependent impurity potential, and the related problem of a single impurity in a quasi 1D wire. It was claimed before in the literature that a quasibound state disappears when a transmission zero collides with the subband boundary. However, the transmission line shape, the Friedel sum rule, and the delay time show that the quasibound states
doi:10.1088/0305-4470/36/5/308
fatcat:t2fcwqsdmzd55e3brhhwsasf5a