Correlated few-electron dynamics in intense laser fields

Sukiasyan, Suren; McDonald, Chris; Vlack, C. Van; Destefani, C. F.; Varin, Charles; Ivanov, Misha; Brabec, Thomas

doi:10.1016/j.chemphys.2009.10.001

Cited by 10 publications

(11 citation statements)

References 45 publications

(51 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This system, and the corresponding bound system H 2 , has served as a reference for developing quantum dynamical methods and demonstrations of fundamental effects in attosecond molecular dynamics, in several recent studies, including refs. [6,[12][13][14][15][16][17][18]62,[69][70][71].…”

Section: Introductionmentioning

confidence: 99%

“…The significance of reaction pathways on complex energy landscapes is, for example, evident for chemical reactions [1] and for some phase transformations [2]; whether a similar picture is appropriate for electronic transitions is currently under investigation [3][4][5][6]; see also the special issue on attosecond molecular dynamics [7] with various contributions, including refs. [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. The essential time ranges on the atomic scale are femtoseconds/picoseconds for the motion of nuclei and down to attoseconds for rearrangements of charge density.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quantum model simulations of attosecond electron diffraction

Baum

Manz

Schild

2010

Sci. China Phys. Mech. Astron.

View full text Add to dashboard Cite

Ultrafast diffraction with free attosecond electron pulses promises insight into the four-dimensional motion of charge density in atoms, molecules and condensed matter. Here we consider the quantum dynamics of the electron-electron scattering process on an attosecond time scale. By numerically solving the time-dependent two-electron Schrödinger equation, we investigate the interaction of an incoming keV-range electron wavepacket by the bound electron of an aligned H + 2 molecule, using a one-dimensional model. Our findings reveal the ratio of elastic to inelastic contributions, the role of exchange interaction, and the influence of the molecular electron density to diffraction. Momentum transfer during the scattering process, from the incoming to the bound electron mediated by the nuclei, leaves the bound electron in a state of coherent oscillation with attosecond recurrences. Entanglement causes related state-selective oscillations in the phase shift of the scattered electron. Two scenarios of distinguishable and indistinguishable free and bound electrons yield equivalent results, irrespective of the electronic spins. This suggests to employ the scenario of distinguishable electrons, which is computationally less demanding. Our findings support the possibility of using electron diffraction for imaging the motion of charge density, but also suggest the application of free electron pulses for inducing attosecond dynamics. ultrafast electron diffraction, scattering theory, attosecond dynamics, entanglement, coherence

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quantum model simulations of attosecond electron diffraction

Baum

Manz

Schild

2010

Sci. China Phys. Mech. Astron.

View full text Add to dashboard Cite

show abstract

“…The three dimensional solution of the time-dependent Schrödinger equation (TDSE) can now be obtained for atoms and molecules having two electrons [9][10][11]. For molecules, numerical solutions of the TDSE including the nuclear degrees of freedom have been derived for only one-electron systems [12][13][14].…”

mentioning

confidence: 99%

Classical Dynamics of Laser-DrivenD3+

2011

View full text Add to dashboard Cite

A classical model of the triatomic D₃⁺ molecule subjected to an intense, few-cycle laser pulse is introduced. The model is capable of describing the laser-induced correlated motion of both electrons and nuclei in three dimensions, and allows us to follow the motion of the two electrons and three deuterons from the initial field-free state, during the pulse, and until the bond breaking into the final fragments. By averaging over many trajectories, we calculate the relative yields of the ionization and dissociation channels, as well as the kinetic energy release (KER) from the fragment ions. A comparison with recent experimental KER spectra shows good qualitative agreement. In addition, we find a pathway in which an emitted electron recombines into a high-lying Rydberg state, resulting in D + D⁺ + D⁺ fragments with the same KER as in the D⁺ + D⁺ + D⁺ channel.

show abstract

“…Nevertheless, they often require significant extensions to work well in attoscience, particularly regarding how the ionisation continuum is handled. Recent examples of these extensions include ab initio methods based on the algebraic diagrammatic construction (ADC) [32][33][34][35][36] and its restricted-correlation-space extension (RCS-ADC) [37][38][39][40], multi-reference configuration interaction (MRCI) [41,42], and multiconfiguration time-dependent Hartree [43] and Hartree-Fock [44] methods, as well as restrictedactive-space self-consistent-field (RAS-SCF) [45][46][47] approaches. -Basis-set development is another crucial element of the numerical implementation work for ab initio methods in attoscience, since the physics accessible to the method, as well as its computational cost, are often determined by the basis set in use.…”

Section: Ab Initio and Numerical Methodsmentioning

confidence: 99%

“…One-dimensional treatments restrict the entire electron motion to this axis [146], and two-dimensional treatments restrict the centre of mass [147], while treating electron correlation in full dimensionality. Similar approximations are made in other methods, such as the multi-configurational time-dependent Hartree method [44], which treats NSDI with the assumption of planar electron motion. -Ab initio full dimensional TDSE simulation Full quantum mechanical treatment of a two-electron atom through direct solution of the time-dependent close-coupling equations [148][149][150][151][152][153].…”

Section: (A) (B)mentioning

confidence: 98%

Dialogue on analytical and ab initio methods in attoscience

et al. 2021

View full text Add to dashboard Cite

The perceived dichotomy between analytical and ab initio approaches to theory in attosecond science is often seen as a source of tension and misconceptions. This Topical Review compiles the discussions held during a round-table panel at the ‘Quantum Battles in Attoscience’ cecam virtual workshop, to explore the sources of tension and attempt to dispel them. We survey the main theoretical tools of attoscience—covering both analytical and numerical methods—and we examine common misconceptions, including the relationship between ab initio approaches and the broader numerical methods, as well as the role of numerical methods in ‘analytical’ techniques. We also evaluate the relative advantages and disadvantages of analytical as well as numerical and ab initio methods, together with their role in scientific discovery, told through the case studies of two representative attosecond processes: non-sequential double ionisation and resonant high-harmonic generation. We present the discussion in the form of a dialogue between two hypothetical theoreticians, a numericist and an analytician, who introduce and challenge the broader opinions expressed in the attoscience community.

show abstract

Correlated few-electron dynamics in intense laser fields

Cited by 10 publications

References 45 publications

Quantum model simulations of attosecond electron diffraction

Quantum model simulations of attosecond electron diffraction

Classical Dynamics of Laser-DrivenD3+

Dialogue on analytical and ab initio methods in attoscience

Contact Info

Product

Resources

About