Relativistic effects in the many-body theory of extreme multiplicity ion formation in superstrong laser fields

Abstract

Account of the relativistic effects in the many-body theory of tunnelling ionization of ions allows the probabilities of formation of ions of extreme multiplicity measured by Yamakawa et al (2003 Phys. Rev. A 68 065403) to be explained qualitatively.

Keldysh theory in a few-cycle laser pulse, inelastic tunneling and Stark shift: comparison withab initiocalculation

“…The most thorough calculations were carried out in [6], where the cases of ionization of Ne and Xe are considered when the ions can be created in two states, the ground and excited states. In the brief report [7], the numerical results obtained in [6] for Ne were perfectly reproduced by generalization of the Keldysh theory on a few-cycle laser pulse and combination of this theory with the inelastic tunneling model that was developed earlier [8][9][10][11][12][13][14]. We use the term 'inelastic tunneling' for the process of ionization of an atom or an ion when the resulting ion turns out in an excited state, not in the ground state.…”

Classical study of atomic bound state dynamics in circularly polarized ultrastrong fields

“…Typically this occurs at optical frequencies for fields of order 10 18 W cm −2 and greater. In ultraintense fields, non-dipole effects from B laser can affect the basic photoionization process [5,6]. The current understanding of this breakdown is limited to the propagation of the photoelectron in an ultra-intense continuum [7] where B laser has been calculated to deflect the electron by nanometers during the first optical cycle subsequent to ionization [8].…”