Virtual detector theory for strong-field atomic ionization

Wang, Xu; Tian, Justin; Eberly, J. H.

doi:10.1088/1361-6455/aab5a4

Cited by 23 publications

(21 citation statements)

References 57 publications

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“…7 for a sketch. Another variant of the backpropagation method would be putting a sphere of virtual detectors [91][92][93][94][95][96] around the target, where the flux is converted into classical trajectories during the laser pulse on the fly [53,97].…”

Section: Hybrid Quantum-classical Methodsmentioning

confidence: 99%

Quantum battles in attoscience: tunnelling

et al. 2021

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What is the nature of tunnelling? This yet unanswered question is as pertinent today as it was at the dawn of quantum mechanics. This article presents a cross section of current perspectives on the interpretation, computational modelling, and numerical investigation of tunnelling processes in attosecond physics as debated in the Quantum Battles in Attoscience virtual workshop 2020. Graphic abstract

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Section: Hybrid Quantum-classical Methodsmentioning

confidence: 99%

Quantum battles in attoscience: tunnelling

et al. 2021

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“…A promising approach would be a combination of the SCTS model with extended virtual detector theory (EVDT), see Refs. [42,43]. For the first time the concept of virtual detector (VD) was proposed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Semiclassical two-step model with quantum input: Quantum-classical approach to strong-field ionization

Shvetsov-Shilovski

Lein

2019

Phys. Rev. A

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We present a mixed quantum-classical approach to strong-field ionization -a semiclassical two-step model with quantum input. In this model the initial conditions for classical trajectories that simulate electron wave packet after ionization are determined by the exact quantum dynamics. As a result, the model allows to overcome deficiencies of standard semiclassical approaches in describing the ionization step. The comparison with the exact numerical solution of the time-dependent Schrödinger equation shows that for ionization of a one-dimensional atom the model yields quantitative agreement with the quantum result. This applies both to the width of the photoelectron momentum distribution and the interference structure. * n79@narod.ru

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“…The virtual detector (VD) method [16,17] is a useful tool for measuring emission properties of a system. We place a virtual detector that measures both the wave function and the probability current near the simulation boundary and before the absorptive region.…”

Section: The Virtual Detector Methods For Measuring Emitted Electron Smentioning

confidence: 99%

1D Quantum Simulations of Electron Rescattering with Metallic Nanoblades

2019

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Electron rescattering has been well studied and simulated for cases with ponderomotive energies of the quasi-free electrons, derived from laser–gas and laser–surface interactions, lower than 50 eV. However, with advents in longer wavelengths and laser field enhancement metallic surfaces, previous simulations no longer suffice to describe more recent strong field and high yield experiments. We present a brief introduction to and some of the theoretical and empirical background of electron rescattering emissions from a metal. We set upon using the Jellium potential with a shielded atomic surface potential to model the metal. We then explore how the electron energy spectra are obtained in the quantum simulation, which is performed using a custom computationally intensive time-dependent Schrödinger equation solver via the Crank–Nicolson method. Finally, we discuss the results of the simulation and examine the effects of the incident laser’s wavelength, peak electric field strength, and field penetration on electron spectra and yields. Future simulations will investigate a more accurate density functional theory metallic model with a system of several non-interacting electrons. Eventually, we will move to a full time-dependent density functional theory approach.

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Virtual detector theory for strong-field atomic ionization

Cited by 23 publications

References 57 publications

Quantum battles in attoscience: tunnelling

Quantum battles in attoscience: tunnelling

Semiclassical two-step model with quantum input: Quantum-classical approach to strong-field ionization

1D Quantum Simulations of Electron Rescattering with Metallic Nanoblades

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