148 citations · 815 across the 47 of their papers we have counts for
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quant-ph2010★ 7 cited
Computing singularities of perturbation series
Simen Kvaal, Elias Jarlebring, Wim Michiels
Many properties of current \emph{ab initio} approaches to the quantum many-body problem, both perturbational or otherwise, are related to the singularity structure of Rayleigh--Sch…
quant-ph2010
Adaptive time-dependent coupled cluster method for multiparticle wavepacket dynamics
Simen Kvaal
A dynamical formulation of coupled cluster theory is derived using a variational principle. By allowing time-dependent single-particle functions, a high degree of adaptivity is int…
quant-ph2010
The role of final state correlation in double ionization of helium: a master equation approach
Sølve Selstø, Tore Birkeland, Simen Kvaal +2
The process of nonsequential two-photon double ionization of helium is studied by two complementary numerical approaches. First, the time-dependent Schr{ö}dinger equation is solved…