Controlling core-hole lifetime through an x-ray planar cavity

Huang, Xin-Chao; Kong, Xiao; Li, Tianjun; Ma, Zhen; Wang, Hong-Chang; Liu, Genchang; Wang, Zhanshan; Li, Wenbin; Zhu, Lin-Fan

doi:10.1103/physrevresearch.3.033063

Cited by 10 publications

(1 citation statement)

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“…The core-hole lifetime is in general controlled by non-radiative decay mechanisms due to electronic correlations, such as Auger decay. Even though it is believed that the core-hole lifetime is an intrinsic property of atom, it was recently demonstrated that it can be tuned in certain cases by employing thin films x-ray planar cavities [66].…”

Section: Core-hole Lifetime and Dependence Of The Lineshapementioning

confidence: 99%

A time-dependent momentum-resolved scattering approach to core-level spectroscopies

Zawadzki,

Nocera,

Feiguin

2023

SciPost Phys.

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While new light sources allow for unprecedented resolution in experiments with X-rays, a theoretical understanding of the scattering cross-section is lacking. In the particular case of strongly correlated electron systems, numerical techniques are quite limited, since conventional approaches rely on calculating a response function (Kramers-Heisenberg formula) that is obtained from a perturbative analysis of scattering processes in the frequency domain. This requires a knowledge of a full set of eigenstates in order to account for all intermediate processes away from equilibrium, limiting the applicability to small tractable systems. In this work, we present an alternative paradigm, recasting the problem in the time domain and explicitly solving the time-dependent Schrödinger equation without the limitations of perturbation theory: a faithful simulation of the scattering processes taking place in actual experiments, including photons and core electrons. We show how this approach can yield the full time and momentum resolved Resonant Inelastic X-Ray Scattering (RIXS) spectrum of strongly interacting many-body systems. We demonstrate the formalism with an application to Mott insulating Hubbard chains using the time-dependent density matrix renormalization group method, which does not require a priory knowledge of the eigenstates and can solve very large systems with dozens of orbitals. This approach can readily be applied to systems out of equilibrium without modification and generalized to other spectroscopies.

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Section: Core-hole Lifetime and Dependence Of The Lineshapementioning

confidence: 99%

A time-dependent momentum-resolved scattering approach to core-level spectroscopies

Zawadzki,

Nocera,

Feiguin

2023

SciPost Phys.

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Relaxation of Ne¹⁺ 1s⁰2s²2p⁶ np produced by resonant excitation of an ultraintense ultrafast x-ray pulse

et al. 2023

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The creation and relaxation of double K-hole states $1s^02s^22p^6np$ ($n\geq3$) of Ne$^{1+}$ in the interaction with ultraintense ultrafast x-ray pulses are theoretically investigated. The x-ray photon energies are selected so that x-rays first photoionize $1s^22s^22p^6$ of a neon atom to create a single K-hole state of $1s2s^22p^6$of Ne$^{1+}$, which is further excited resonantly to double K-hole states of $1s^02s^22p^6np$ ($n\geq3$). A time-dependent rate equation is used to investigate the creation and relaxation processes of $1s^02s^22p^6np$, where the primary microscopic atomic processes including photoexcitation, spontaneous radiation, photoionization and Auger decay are considered. The calculated Auger electron energy spectra are compared with recent experimental results, which shows good agreement. The relative intensity of Auger electrons is very sensitive to the photon energy and bandwidth of x-ray pulses, which could be used as a diagnostic tool for x-ray free electron laser and atom experiments.

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Inverse design approach to x-ray quantum optics with Mössbauer nuclei in thin-film cavities

2022

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Controlling core-hole lifetime through an x-ray planar cavity

Cited by 10 publications

References 50 publications

A time-dependent momentum-resolved scattering approach to core-level spectroscopies

A time-dependent momentum-resolved scattering approach to core-level spectroscopies

Relaxation of Ne¹⁺ 1s⁰2s²2p⁶ np produced by resonant excitation of an ultraintense ultrafast x-ray pulse

Inverse design approach to x-ray quantum optics with Mössbauer nuclei in thin-film cavities

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Controlling core-hole lifetime through an x-ray planar cavity

Cited by 10 publications

References 50 publications

A time-dependent momentum-resolved scattering approach to core-level spectroscopies

A time-dependent momentum-resolved scattering approach to core-level spectroscopies

Relaxation of Ne1+ 1s02s22p6 np produced by resonant excitation of an ultraintense ultrafast x-ray pulse

Inverse design approach to x-ray quantum optics with Mössbauer nuclei in thin-film cavities

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Relaxation of Ne¹⁺ 1s⁰2s²2p⁶ np produced by resonant excitation of an ultraintense ultrafast x-ray pulse