Fig. 5: Core-hole lifetime contribution to the quantum Fisher information (QFI) evaluation.
From: Witnessing light-driven entanglement using time-resolved resonant inelastic X-ray scattering
a Evolution of S(q, ω, t) extracted from the trRIXS intensity for core-hole lifetime set as τ = 1/2th. b Comparison of the exact results of instantaneous QFI (black dashed line), the snapshot QFI density \({\bar{f}}_{{{{{{{{\rm{Q}}}}}}}}}(q,\, t)\) (blue curve) evaluated the direct integration, and the QFI density fQ(q, t) (red curve) evaluated by the self-consistent iteration. c, d Same as a, b but for the zero core-hole lifetime situation, where trRIXS is identical to S(q, ω, t). The upper insets show the evolution of the pump-field vector potential.
