Berlin 2001 – wissenschaftliches Programm

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A: Atomphysik

A 20: Atoms in Fields

A 20.5: Vortrag

Freitag, 6. April 2001, 16:45–17:00, H1058

Laser-Atom Interaction at strongly relativistic intensities — •Ernst Lenz, Martin Dörr, and Wolfgang Sandner — Max-Born-Institut, 12489 Berlin

We investigate the interaction of a charged particle in a potential with an ultra-strong and ultra-short field pulse. We consider a one-dimensional model for ionization and potential scattering. We compare the solutions of the time dependent Dirac (D)-, Klein-Gordon (relativistic Schrödinger, RS)- and the non relativistic Schrödinger equation. In the absence of a static potential the D and RS are equivalent, so a solution of the D equation is not necessary. The D equation becomes relevant if one deals with (a) deeply bound states in highly charged ions or (b) pair creation effects.
References: Bottcher, C. and Strayer, M.R., 1986, Ann. Phys. 175, 64; Braun, J.W., Su, Q. and Grobe, R., 1999, Phys. Rev. A 59, 601; Dombey, N. and Calogeracos, A., 1999, Phys. Rep. 315, 41; Lenz, E., Dörr, M. and Sandner, W. , 2001, Laser Phys., 11; Lenz, E., Dörr, M. and Sandner, W. , 2001, Proceedings of the conference on Super-Intense Laser-Atom Physics, Piraux, B., ed., Kluwer; Rathe, U.W., Keitel, C.H., Protopapas, M. and Knight, P.L., 1997, J. Phys. B 30, 531