The Hermitian representation of the complex-rotation method and its application to the 1s2s22S resonance of He-
- 1 January 1991
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 24 (2) , 413-421
- https://doi.org/10.1088/0953-4075/24/2/009
Abstract
The spectrum of the H operator, fundamental for the Hermitian representation of the complex-coordinate method, is proven to be symmetric with respect to zero. This property makes the effective application of H eigenproblems possible, instead of H2 eigenproblems. The Hermitian representation complex-coordinate method modified in this way is applied, with a superposition of correlated configurations as a trial function, to the He- 1s2s2 2S resonance and gives the position at 19.367 eV above the He ground state and a width of 8.6 meV.Keywords
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