By R. Trainham, N. J. van Druten, L. D. Noordam, H. G. Muller, P. Breger, G. Petite (auth.), André D. Bandrauk, Stephen C. Wallace (eds.)
This quantity comprises the lectures and communications awarded on the NATO complex study Workshop (NATO ARW 900857) which was once held could 5-10, 1991 at McMaster college, Hamilton, Ontario, Canada. a systematic commitee made of P.P. Lambropoulos (USC & Crete), P.8. Corkum (NRC, Ottawa), and H. B. vL. van den Heuvell (FOM, Amsterdam) guided the organizers, A.D. Bandrauk (Sherbrooke) and S.C. Wallace (Toronto) in getting ready a programme which might hide the newest advances within the box of atom and molecule laser interactions. because the final assembly held in July 1987 on "Atomic and Molecular procedures with brief severe Laser Pulses", NATO ASI vol 1718 (Plenum Press 1988), massive development has been made in knowing excessive depth results on atoms and the concomitant coherence results. After 4 years, the emphasis is now moving extra to molecules. the current quantity represents accordingly this pattern with 4 sections masking the most pursuits of study endeavours during this region: i) Atoms in excessive Laser-Fields ii) Molecules in extreme Laser Fields iii) Atomic Coherences iv) Molecular Coherences The event constructed through the years in multiphoton atomic techniques has been very invaluable and is the most resource of our knowing of comparable strategies in molecules. therefore ATI (above threshold ionization) has been discovered to take place in molecules in addition to a brand new phenomenon, ATD (above-threshold dissociation). Laser-induced shunned crossings of molecular digital surfaces is additionally now coming into the present language of excessive depth molecular processes.
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Additional info for Coherence Phenomena in Atoms and Molecules in Laser Fields
8 As a test for the method and the invariance under the gauge transformation, we first calculate single-photon ionization of hydrogen at different peak intensities (which defined as 10 = cEV81r, is considered more as parameter of the numerical calculation than a quantity with a physical counterpart, since a rigorous definition of intensity for very short pulses is impossible), by using both the length and the velocity gauges. Because of the short pulse duration, the time derivative of the pulse envelope function f cannot be neglected in the definition of the electric field in terms of the vector potential.
8 Timelcycleal Fig. 4. 10 -16 ) Total atomic energy as a function of time. ; + .. 75 x 10 14 = 8 x 2 W/cm. = o(s). 2 au, corresponding to figures 2 and 3. 5 femtoseconds), considerable population of higher angular moments occurs. Furthermore, distinct phase relations remain. Thus the p states are out of phase with respect to the 5 states, and the l = 9 state is out of phase with both 5 and p states on the femtosecond time scale. 1 0 2 0 4 6 8 10 Tim' (cycleel Fig. 5. Populations of l conditions as fig.
C. Henneberger, Phys. Rev. Lett. 21, 838 (1968). 8. B. Piraux, E. L. Knight, Phys. Rev. A44, 721 (1991). 9. M. A. Orszag in "Advanced Mathematical Methods for Scientists and Engineers" (McGraw-Hill, New York 1978) chap. 7. 10. M. Pont and R. Shakeshaft to be published; B. Piraux and E. Huens, submitted for publication. 11. M. Pont and M. Gavrila, Phys. Rev. Lett. 65, 2362 (1990); Q. H. Eberly and J. Javanainen, Phys. Rev. Lett. C. J. L. Krause, Phy~ Rev. Lett. 66, 2601 (1991). 12. M. Pont and R.
Coherence Phenomena in Atoms and Molecules in Laser Fields by R. Trainham, N. J. van Druten, L. D. Noordam, H. G. Muller, P. Breger, G. Petite (auth.), André D. Bandrauk, Stephen C. Wallace (eds.)