Abstract
The strict coalescence of two resonance states may never occur (due to the sensitivity to small external perturbations). However, its existence can have noticeable effects on measurable quantities. The coalescence of resonances is associated with exceptional points (EPs) in the spectrum of the system under study. The determination of exceptional points is often a hard numerical task, due to the need to calculate many eigenvalues of a non-Hermitian Hamiltonian as a function of the potential's parameters which are to be varied adiabatically. The method presented here is based on the Padé algorithm. This enables one to calculate the EPs with a small number of solutions. As an illustrative numerical example an EP of H+2 in strong laser fields is calculated.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Physics B: Atomic, Molecular and Optical Physics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
