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Title: Hydrogen atom excitation in intense attosecond laser field: Gauge dependence of dipole approximation

It is assumed that, the atomic excitations probability can be calculated using first order perturbation theory and dipole approximations. The validity of the dipole approximations had been examined by comparing the results with the results obtained by exact calculations within the first order perturbation theory[2]. Figure 1 shows the time dependence of the transition probability in the dipole approximation. From these plots it is obvious that, the probabilities obtained in the length gauge are higher than that in the velocity gauge, in the interaction period (−τ/2
Authors:
;  [1] ;  [2]
  1. Theoretical Physics and Simulation Group, School of Materials Technology, MUST (Mongolia)
  2. School of Physics and Electronics, NUM (Mongolia)
Publication Date:
OSTI Identifier:
22265969
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1589; Journal Issue: 1; Conference: ICMNS 2012: 4. international conference on mathematics and natural sciences: Science for health, food and sustainable energy, Bandung (Indonesia), 8-9 Nov 2012; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; APPROXIMATIONS; DIPOLES; EXCITATION; HYDROGEN; INTERACTIONS; LASER RADIATION; PERTURBATION THEORY; PROBABILITY; TIME DEPENDENCE