Improved Weisskopf-Wigner approximation for atomic ionization by short laser pulses

An improved Weisskopf-Wigner approximation allows to obtain a closed form for the survival amplitude and the ionization amplitudes of atoms subject to laser pulses. The improvement avoids the numerical solution of a Volterra integro-differential equation obtained by modeling full initial state coupl...

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Detalles Bibliográficos
Autores principales: Bustamante, M.G., Rodríguez, V.D., Mendez L., Martin F., Diaz C., Garcia G., Rabadan I.
Formato: CONF
Materias:
Atoms
Differential equations
Integrodifferential equations
Ionization
Laser pulses
Atomic ionization
Initial state
Ionization amplitude
Numerical solution
Other discrete
Short laser pulse
Volterra integro-differential equations
Weisskopf-Wigner approximation
Atom lasers
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_17426588_v635_n9_p_Bustamante
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:An improved Weisskopf-Wigner approximation allows to obtain a closed form for the survival amplitude and the ionization amplitudes of atoms subject to laser pulses. The improvement avoids the numerical solution of a Volterra integro-differential equation obtained by modeling full initial state coupling to the continuum as well as transitions between initial state and other discrete states. The calculations are made in the velocity gauge. The improved approximation compares well with a full TDSE numerical solution for Hydrogen. © Published under licence by IOP Publishing Ltd.

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