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- W3015531907 abstract "The Siegert states are approached in framework of Bloch-Lane-Robson formalism for quantum collisions. The Siegert state is not described by a pole of Wigner R-matrix but rather by the equation 1 − RnnLn = 0, relating R-matrix element Rnn to decay channel logarithmic derivative Ln. Extension of Siegert state equation to multichannel system results in the replacement of channel R- matrix element Rnn by its reduced counterpart Rnn. One proves the Siegert state is a pole, (1 − RnnLn)−1, of multichannel collision matrix. The Siegert equation 1 − RnnLn = 0, (n – Rydberg channel), implies basic results of Quantum Defect Theory as Seaton’s theorem, complex quantum defect, channel resonances and threshold continuity of averaged multichannel collision matrix elements." @default.
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- W3015531907 date "2020-04-01" @default.
- W3015531907 modified "2023-09-27" @default.
- W3015531907 title "Siegert state approach to quantum defect theory" @default.
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- W3015531907 doi "https://doi.org/10.1140/epjd/e2020-100563-2" @default.
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