Nonequilibrium Green function approach to photoionization processes in atoms

Abstract

We present a quantum kinetic approach for the time-resolved description of many-body effects in photoionization processes in atoms. The method is based on the non-equilibrium Green functions formalism and solves the Keldysh/Kadanoff-Baym equations in second Born approximation. An approximation scheme is introduced and discussed, which provides a complete single-particle description of the continuum, while the atom is treated fully correlated.

11 pages, 6 figures

References in corpus (5)

• Full configuration interaction approach to the few-electron problem in artificial atoms
• Conserving approximations in time-dependent quantum transport: Initial correlations and memory effects
• Bound states in ab initio approaches to quantum transport: A time-dependent formulation
• Nonequilibrium Green's functions approach to strongly correlated few-electron quantum dots
• Angular distributions of atomic photoelectrons produced in the UV and XUV regimes

Cited by in corpus (8)

• Time-dependent restricted-active-space self-consistent field theory for laser-driven many-electron dynamics
• Time-dependent restricted active space Configuration Interaction for the photoionization of many-electron atoms
• Time-dependent restricted-active-space self-consistent-field theory for laser-driven many-electron dynamics. II. Extended formulation and numerical analysis
• Efficient grid-based method in nonequilibrium Green's function calculations. Application to model atoms and molecules
• Time-dependent restricted-active-space self-consistent-field singles method for many-electron dynamics
• Extraction of the frequency moments of spectral densities from imaginary-time correlation function data
• Finite elements and the discrete variable representation in nonequilibrium Green's function calculations. Atomic and molecular models
• Extracting partial decay rates of helium from complex rotation: autoionizing resonances of the one-dimensional configurations