Photoelectron spectra in strong-field ionization by a high-frequency field

Bondar, Denys I.; Spanner, Michael; Liu, Wing‐Ki; Yudin, G. L.

doi:10.1103/physreva.79.063404

Cited by 8 publications

(12 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…with other figures in Ref. [33] showing equally good agreement. Further verification of the high-frequency SPFA-SEFA coalescence was found [47] in a comparison between the SPFA and the high-frequency method of Gavrila [48,49].…”

Section: Extension To Relativistic Conditionssupporting

confidence: 79%

“…This conclusion is borne out by high-frequency TDSE calculations reported in Ref. [33]. A sample of this agreement is shown in Fig.…”

Section: Spfa-sefa Coalescence At High Frequenciessupporting

confidence: 63%

“…For the significance of other labeling in the figure, see Ref. [33]. For present purposes, the important features are the remarkably close correspondences between the panels labeled "SFA" (SPFA in this article) and those labeled "Numerical" (TDSE).…”

Section: Extension To Relativistic Conditionsmentioning

confidence: 53%

“…This stands in contrast to the low-frequency and high-frequency restrictions inherent in tunneling methods and the high-frequency-only domain of the KH-based approximations. An interesting development is that the SPFA produces results at high frequencies equivalent to the KHbased methods of Faisal and Gavrila, and to TDSE [33]. That is, the SPFA, fundamentally different from DA methods at low frequencies, becomes equivalent to DA theories at high frequencies (albeit intensity-limited to nonrelativistic conditions).…”

Section: The Reiss Approximationmentioning

confidence: 99%

See 3 more Smart Citations

Electrodynamics of the strong-field approximation and deficiencies of the tunneling model

Reiss

2018

Preprint

View full text Add to dashboard Cite

The strong-field laser physics enterprise is investing important resources in the study of the effects of oscillatory electric fields on matter using the tunneling concept, whereas laser fields are vector fields that do not support the tunneling model. Oscillatory electric fields and propagating plane-wave laser fields are different electrodynamic phenomena, and similarities in their effects diminish as field intensity increases. Major differences are known in the case of very low frequencies where oscillatory electric fields act adiabatically as the frequency declines, in contrast to extreme relativistic effects of strong laser fields. Many supposed new phenomena, such as ATI (Above-Threshold Ionization), channel closing, and stabilization were studied in terms of propagating fields before they came to the attention of the atomic physics community. This illustrates the efficiency of using proper electrodynamic methods for the treatment of laser effects. Problems arising from the conflation of the effects of oscillatory electric fields and propagating fields are exacerbated by using ill-defined nomenclature, such as KFR and SFA, that has been used indiscriminately to apply both to oscillatory electric fields and to propagating fields. Research resources can be applied with much-improved efficiency if proper electrodynamic treatment of laser fields is employed.

show abstract

Section: Extension To Relativistic Conditionssupporting

confidence: 79%

“…This conclusion is borne out by high-frequency TDSE calculations reported in Ref. [33]. A sample of this agreement is shown in Fig.…”

Section: Spfa-sefa Coalescence At High Frequenciessupporting

confidence: 63%

Section: Extension To Relativistic Conditionsmentioning

confidence: 53%

Section: The Reiss Approximationmentioning

confidence: 99%

See 2 more Smart Citations

Electrodynamics of the strong-field approximation and deficiencies of the tunneling model

Reiss

2018

Preprint

View full text Add to dashboard Cite

show abstract

“…As usual, in cases where the XUV and/or IR field is strong, only full numerical treatments are capable of correctly describing the coupled light-matter system (see, for instance, refs. [10][11][12]), and this regime is not within the scope of the perturbative model discussed herein.…”

Section: Introductionmentioning

confidence: 99%

Angle-resolved RABBITT: theory and numerics

Hockett

2017

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

I. ABSTRACTAngle-resolved (AR) RABBIT measurements offer a high information content measurement scheme, due to the presence of multiple, interfering, ionization channels combined with a phase-sensitive observable in the form of angle and time-resolved photoelectron interferograms. In order to explore the characteristics and potentials of AR-RABBIT, a perturbative 2-photon model is developed; based on this model, example AR-RABBIT results are computed for model and real systems, for a range of RABBIT schemes. These results indicate some of the phenomena to be expected in AR-RABBIT measurements, and suggest various applications of the technique in photoionization metrology. Article history• arXiv (this version) The RABBIT methodology -"reconstruction of attosecond harmonic beating by interference of two-photon transitions" [1] -essentially defines a scheme in which XUV pulses are combined with an IR field, and the two fields are applied to a target gas. The gas is ionized, and the photoelectrons detected. In the typical case, the IR field is at the same fundamental frequency ω as the field used to drive harmonic generation, and the XUV field generated is an atto-second pulse train with harmonic components nω, with odd-n only. In this case, if the intensity of the IR field is low to moderate, the resultant photoelectron spectrum will be comprised of discrete bands corresponding to direct 1-photon XUV ionization, * paul.hockett@nrc.ca and sidebands corresponding to 2-photon XUV+IR transitions [1]. (The energetics of this situation are illustrated in fig. 1.) Temporally, if the XUV pulses are short relative to the IR field cycle, the sidebands will also show significant time-dependence, since they will be sensitive to the optical phase difference between the XUV and IR fields, with an oscillatory frequency of 2ω. In this case, a measurement which is angle-integrated, or made at a single detection geometry, can be viewed as a means to characterising the properties of the XUV pulses (spectral content and optical phase), provided that the ionizing system is simple or otherwise well-characterised [1]; RABBIT can therefore be utilised as a pulse metrology technique [1,2], and this is the typical usage.Conversley, RABBIT can also be regarded as a photoelectron metrology technique, since it is sensitive to the magnitudes and phases of the various photoionization pathways accessed. In contrast to most traditional (energy-resolved) photoelectron spectroscopy techniques, RABBIT has the distinction of interfering pathways resulting from different 1-photon transition energies: it is thus sensitive to the energy-dependence of the photoionization dynamics, as well as to the partial-wave components within each pathway. An angle-resolved (AR) RABBIT measurement is particularly powerful in this regard, since the partial-wave phases are encoded in the angular part of the photoelectron interferogram. Although this is a potentially powerful technique, the underlying photoionization dynamics may be extremely complicated, hence quantitati...

show abstract

Uncomputability and complexity of quantum control

Bondar

Pechen

2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

In laboratory and numerical experiments, physical quantities are known with a finite precision and described by rational numbers. Based on this, we deduce that quantum control problems both for open and closed systems are in general not algorithmically solvable. To prove this statement, we develop a technique based on establishing the equivalence between quantum control problems and Diophantine equations, which are polynomial equations with integer coefficients and integer unknowns. In addition to proving uncomputability, this technique allows to construct quantum control problems belonging to different complexity classes. In particular, an example of the control problem involving a two-mode coherent field is shown to be NP-hard, contradicting a widely held believe that two-body problems are easy.

show abstract

Photoelectron spectra in strong-field ionization by a high-frequency field

Cited by 8 publications

References 57 publications

Electrodynamics of the strong-field approximation and deficiencies of the tunneling model

Electrodynamics of the strong-field approximation and deficiencies of the tunneling model

Angle-resolved RABBITT: theory and numerics

Uncomputability and complexity of quantum control

Contact Info

Product

Resources

About