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An Iterative Ab Initio Non-Hermitian Floquet Method for Photoionization Resonances

preprint
submitted on 06.10.2020 and posted on 13.10.2020 by sajeev Y
We present an efficient ab initio non-Hermitian Floquet method for computing the photoionization resonances of an electronic system interacting with linearly polarized
monochromatic laser light. Unlike the direct "brute force" diagonalization method, which has been used for huge Floquet matrix eigenvalue problems, the new method follows a simple iterative process. The computational advantages of
the iterative method are very remarkable as it avoids computation, storage, and diagonalization of the huge Floquet matrix. The new method can also be used in
conjunction with the ab initio computational techniques that were originally developed for the field-free bound state calculations. The method is best illustrated
with the photoionization resonance of the hydrogen atom.

History

Email Address of Submitting Author

y.sajeev@gmail.com

Institution

Bhabha Atomic Research Centre

Country

India

ORCID For Submitting Author

0000-0002-2250-5101

Declaration of Conflict of Interest

Author decalre no conflicts of interest

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