In our new paper, published in Physical Review Research, we investigate the influence of catastrophes and hidden dynamical symmetries on utrafast backscattered photoelectrons. Using elements of catastrophe theory, we revisit the backscattered ridge & show that it is not purely kinematic as previously believed. There is a hidden symmetry for the Coulomb potential that is broken for the softcore case. Counterintuitively, the effect gets more pronounced for longer wavelengths.
Below is a teaser. The whole article can be found here
This contradicts a widely held belief and shows that sometimes things are more complicated than they seem. The rescattering ridge is one of the best known boundaries in our field and the soft-core potential has also been widely studied.
Using elements of catastrophe theory, we revisit the backscattered ridge & show that it is not purely kinematic as previously believed. There is a hidden symmetry for the Coulomb potential that is broken for the softcore case.
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