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Abstract

The article presents a quantum kinetic framework to study interacting quan¬tum systems. Having the constituting model Hamiltonians of two-band semiconductor and the photoexcited electron-hole pair, their quantum kinetic evolution has been revi-sited. Solution to this nonlinear problem of electron-hole interaction is obtained making use of the self-consistency loop between the densities of photoexcited electrons and holes and the pairwise interaction terms in the constituting model Hamiltonians. In the leading order, this approach supports the required isomorphism between the pairwise interaction and the birth and annihilation operators of the photoexcited electrons and holes as a desirable property. The approach implies the Hilbert space and the tensor product mathematical techniques as an appropriate generalization of the noninteracting electron-hole pair toward several-body systems.

Abstract

This paper shows the theoretical predictions of the outer-shell ionization effect on the positions of Kα1,2,1,3, and K β2 X-ray lines for some 4d-transition metals (molybdenum and palladium) and 4f rare-earth elements (dysprosium and ytterbium). The ionization energy shifts have been evaluated using the multiconfiguration Dirac-Fock method, containing Breit interaction and quantum electrodynamic (QED) corrections. The presented results are important for obtaining the information about some parameters of plasma generated by different sources, especially by pulsed power machine and short-pulse lasers.

.I. Cotaescu, C. Crucean and C.A. Sporea, Eur. Phys. J. C (2016) 76 :413. [37] C.A. Sporea, Chinese Physics C , Vol. 41 , No. 12 (2017) 123101. [38] V. B. Berestetski, E. M. Lifshitz and L. P. Pitaevski. Quantum Electrodynamics . Pergamon Press, Oxford, 1982. [39] I.D. Novikov, Doctoral disertation, Sthernberg Astronomical Institute (1963). [40] I.I. Cotaescu, C. Crucean, Mod. Phys. Lett. A 22 (2008) 3707-3720. [41] I.I. Cotaescu, R. Racoceanu, C. Crucean, Mod. Phys. Lett. A 21 (2006) 1313-1318. [42] F. W. J. Olver, D. W. Lozier, R. F. Boisvert and C. W. Clark

.W., Phys. Rev., 181 (1969), 530. [38] LI W., LI D.Y., Phys. Status Solidi A, 196 (2003), 390. [39] FEYNMAN R.P., Statistical Mechanics. A Set of Lectures, W.A. Benjamin, New York, 1972, Fig. 2.3 and 4.1 and related text; FEYNMAN R.P., Quantum Electrodynamics, W.A. Benjamin, New York, 1961, Fig. 11. [40] ONO M., NISHIGATA Y., NISHIO T., EGUCHI T., HASEGAWA Y., Phys. Rev. Lett., 96 (2006), 016801. [41] ONO M., NISHIO T., AN T., EGUCHI T., HASEGAWA Y., Appl. Surf. Sci. 256 (2009), 469. [42] DURAKIEWICZ T., Phys. Rev. B, 61 (2000), 11166. [43] JANSSENS T.V.W., CASTRO G