High-order-harmonic generation from field-distorted orbitals

Śpiewanowski, Maciej Dominik; Etches, Adam; Madsen, Lars Bojer

doi:10.1103/physreva.87.043424

Cited by 19 publications

(22 citation statements)

References 53 publications

(80 reference statements)

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“…(ii) Another method which has been used to estimate the dipole entering OEA models is to fit the energy of the HOMO for weak fields to the perturbation theory expansion similar to Eqs. (33a) and (35a) [57][58][59][60]. This approach yields the dipole of the HOMO with some multielectron effects included, since all electrons relax and re-adjust for each calculation performed at a given field F .…”

Section: G One-electron and Single-active-electron Approximationsmentioning

confidence: 99%

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Weak-field asymptotic theory of tunneling ionization in many-electron atomic and molecular systems

2014

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The weak-field asymptotic theory of tunneling ionization in an external static uniform electric field [Tolstikhin et al., Phys. Rev. A 84, 053423 (2011)] is extended to many-electron atomic and molecular systems treated in the frozen-nuclei approximation. The leading-order term in the asymptotic expansion of the ionization rate in the value of the field F for F → 0 is obtained. The resulting formulas express in terms of properties of the unperturbed system. The most essential difference from the one-electron case, through which the many-electron character of the present theory reveals itself, is that the structure factor for a given ionization channel, defining the dependence of the ionization rate into this channel on the orientation of the system with respect to the field, is determined by the corresponding Dyson orbital. The theory is illustrated by calculations for several few-electron systems. The asymptotic results are compared with accurate fully correlated calculations of tunneling ionization rates available in the literature.

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Section: G One-electron and Single-active-electron Approximationsmentioning

confidence: 99%

“…(39), and the asymptotic coefficient g n00 in the Dyson orbital defined by Eq. (60). The energies for the systems considered can be found in the literature, so the main goal of the present calculations is to obtain the coefficient g n00 .…”

Section: Illustrative Calculations For Few-electron Systemsmentioning

confidence: 99%

Weak-field asymptotic theory of tunneling ionization in many-electron atomic and molecular systems

2014

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“…We finally summarize our work in Sec. V and we will draw a qualitative parallel between the field distorted orbitals computations [56,57] and our developments. In this paper, all the equations are expressed in atomic units (a.u.…”

Section: Introductionmentioning

confidence: 89%

“…These expressions are reminiscent to the ones of [56,57], where field dressed states were used a priori to define the dipole.…”

Section: Ii42 Total Dipolementioning

confidence: 99%

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Dynamical distortions of structural signatures in molecular high-order harmonic spectroscopy

et al. 2019

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We study the signature of two-center interferences in molecular high-order harmonic spectra, with an emphasis on the spectral phase. With the help of both ab initio computations based on the time-dependent Schrödinger equation and the molecular Strong-Field Approximation (SFA) as developed by Chirilȃ et al. [Physical Review A, 73, 023410 (2006)] and Faria [Physical Review A, 76, 043407 (2007)], we observe that the phase behavior is radically different for the short and the long trajectory contributions. By means of Taylor expansions of the molecular SFA, we link this effect to the dynamics of the electron in the continuum. More precisely, we find that the value of the electric field at recombination time plays a crucial role on the shape of the destructive interference phase-jump. arXiv:1811.07688v2 [physics.atom-ph]

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Attosecond Molecular Dynamics and Spectroscopy

Baykusheva

Wörner

2021

Molecular Spectroscopy and Quantum Dynamics

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High-order-harmonic generation from field-distorted orbitals

Cited by 19 publications

References 53 publications

Weak-field asymptotic theory of tunneling ionization in many-electron atomic and molecular systems

Weak-field asymptotic theory of tunneling ionization in many-electron atomic and molecular systems

Dynamical distortions of structural signatures in molecular high-order harmonic spectroscopy

Attosecond Molecular Dynamics and Spectroscopy

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