Molecular and Optical Physics
Recent advancements in atomic many-body methods for high-precision studies of isotope shifts
The development of atomic many-body methods, capable of incorporating electron correlation effects accurately, is required for isotope shift (IS) studies. In combination with precise measurements, such calculations help to extract nuclear charge radii …
Molecular and Optical Physics
Simulated optical molasses cooling of trapped antihydrogen
We theoretically and computationally investigate the cooling of antihydrogen, , using optical molasses cooling. This updates the results in Donnan et al (2013 J. Phys. B: At. Mol. Opt. Phys.46 025302) to the current capabilities of the ALPHA experiment…
Molecular and Optical Physics
Resonant x-ray emission across the L 3 edge of uranium compounds
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…
Molecular and Optical Physics
Geometric meaning of high-order exceptional points in non-Hermitian Su–Schrieffer–Heeger model
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…