A narrow bandwidth x-ray beamline and a multi-crystal von Hamos spectrometer were used to record x-ray absorption and x-ray emission (XES) across the uranium L3 edge of UO2, UO3, Cs2UO2Cl4, and Cs2UCl6. Measurements were made over 17150–17250 eV with a…
We investigate the geometric meaning of high-order exceptional points (EPs) in non-Hermitian Su–Schrieffer–Heeger model. High-order EPs are highly associated with the non-Bloch parity-time ( ) symmetry, a novel type of symmetry caused by the non-Hermit…
In our study, we conduct a comprehensive theoretical analysis on the propagation behavior of a Gaussian pulse through a four-level Λ-type rubidium atomic medium under room temperature conditions. Our investigation uncovers the presence of two distinct …