Multiphoton Processes in Atoms

Delone, N. B.; Крайнов, В. П.

doi:10.1007/978-3-642-57208-1

Cited by 255 publications

(282 citation statements)

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“…Accordingly, the achievable charge states here should be, in fact, generally higher than predicted by the present model. It should be noted that the limit of the present semi-classical approach as defined by equation 11 corresponds also to the limit for ponderomotive energy of (quasi-)free electrons to, again, distinguish the non-perturbative from the perturbative regime [10][11][12].…”

Section: Application Of the Modelmentioning

confidence: 87%

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Atomic plasma excitations in the field of a soft x-ray laser

Richter¹

2011

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

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The interaction of atoms with short-wavelength radiation at ultra-high intensities is described by plasma excitation. In contrast to former works on optical radiation and ponderomotive motion of quasi-free electrons, the excitation of correlated and bound electrons is considered here. The ponderomotive motion of a free electron is included as a special case. Values for the energy transfer from the radiation field to an atom are obtained in fair agreement with the unexpectedly high charge states of xenon recently observed at the soft x-ray free-electron laser FLASH.

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Section: Application Of the Modelmentioning

confidence: 87%

“…In the spectral range of optical radiation, photon-electron interactions at ultra-high intensities may also be described by so-called non-perturbative theories [10][11][12]. Their applicability depends on the ponderomotive energy U p :…”

Section: Introductionmentioning

confidence: 99%

Atomic plasma excitations in the field of a soft x-ray laser

Richter¹

2011

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

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“…One notes that in the above consideration p W /p C ∼ n ph −1 (F 2 /ω 3 0 ) = η (δt Ae ω 2 0 (1 + ǫ 2 ) −1 = η · 15.89 (ω 0 , ǫ are given in sec I). It is worthwhile to mention that in strong field experiments, the process of scattering in the tunneling and the MPI regimes are complex and nonlinear [87]. As the process is nonlinear, it is possible that η depends on the mean photon number n ph involved in the interaction (not the total number of the photons of the LWP), which depends on the probability density to find a photon in the interaction volume/area, compare m F ederov …”

Section: The Tunneling Processmentioning

confidence: 99%

“…One notes that the Keldysh time τ K is large, for in the region of γ K > 1 the field strength of the laser pulse is small and does not disturb the electron heavily, the evolution of the electron's MWP is relatively slow, while for γ K < 1 the electron is enforced to move at a fast time scale τ T,sym (or τ T,d ), see eq 2. Furthermore, in the immediate region γ K ∼ 1, which is narrow [87] (chap 1, p. 2), there is still no clear picture, where both the MPI and tunneling can take place [32,100] and investigations show that non-adiabatic effects affect the tunneling, i.e. differently from the adiabatic approximation, where the electron sees approximately a static electric field during the ionization process [47,[101][102][103][104].…”

Section: The Tunneling Processmentioning

confidence: 99%

How to understand the tunneling in attosecond experiment?

Kullie

2018

Annals of Physics

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The measurement of the tunneling time (T-time) in today's attosecond and strong field (low-frequency) experiments, despite its controversial discussion, offers a fruitful opportunity to understand time measurement and the time in quantum mechanics. In addition, as we will see in this work, a related controversial issue is the particulate nature of the radiation. Different models used to calculate the T-time will be discussed in this work in relation to my model of real T-time, Phys. Rev. 92, 052118 (2015), where an intriguing similarity to the Bohr-Einstein photon box Gedanken experiment was found. The tunneling process itself is still not well understood, but I am arguing that a scattering mechanism (by the laser wave packet) offers a possibility to understand the tunneling process in the tunneling region. This is related to the question about the corpuscular nature of light which is widely discussed in modern quantum optics experiments.Keywords: Attosecond physics, tunneling time and time measurement in attosecond experiments, timeenergy uncertainty relation, time and time-operator in quantum mechanics, Bohr-Einstein's photon box Gedanken experiment, multiphoton processing, Compton scattering, wave-particle duality. I. INTRODUCTIONThere is no doubt that the advent of 'attophysics' opens new perspectives in the study of time resolved phenomena in atomic and molecular physics [1][2][3][4][5] A similar controversial issue to the time issue (and the T-time and TEUR) is the wave-matter duality and the partic-

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“…[12][13][14] The application of strong pulses to atoms has a long history. [15][16][17][18][19][20][21][22][23][24][25] Here we are interested in non-ionizing effects, which require the use of moderately-strong pulses, typically within tens of TW/cm 2 . Thomas George and Andre Bandrauk developed a very useful "chemical" picture of light-induced events.…”

Section: Introductionmentioning

confidence: 99%

Molecular events in the light of strong fields: A light‐induced potential scenario

Chang

Solá

Shin

2016

Int J of Quantum Chemistry

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A new perspective on how to manipulate molecules by means of very strong laser pulses is emerging with insights from the so-called light-induced potentials, which are the adiabatic potential energy surfaces of molecules severely distorted by the effect of the strong field. Different effects appear depending on how the laser frequency is tuned, to a certain electronic transition, creating light-induced avoided crossings, or very off-resonant, generating Stark shifts. In the former case it is possible to induce dramatic changes in the geometry and redistribution of charges in the molecule while the lasers are acting and to fully control photodissociation reactions as well as other photochemical processes. Several theoretical proposals taken from the work of the authors are reviewed and analyzed showing the unique features that the strong-laser chemistry opens to control the transient properties and the dynamics of molecules.

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Multiphoton Processes in Atoms

Cited by 255 publications

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Atomic plasma excitations in the field of a soft x-ray laser

Atomic plasma excitations in the field of a soft x-ray laser

How to understand the tunneling in attosecond experiment?

Molecular events in the light of strong fields: A light‐induced potential scenario

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