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- W2015709666 abstract "We present a systematic study of the influence of energy and phase relaxation on dynamic polarizability simulations in the linear response regime. The nonperturbative approach is based on explicit electron dynamics using short laser pulses of low intensities. To include environmental effects on the property calculation, we use the time-dependent configuration-interaction method in its reduced density matrix formulation. Both energy dissipation and nonlocal pure dephasing are included. The explicit treatment of time-resolved electron dynamics gives access to the phase shift between the electric field and the induced dipole moment, which can be used to define a useful uncertainty measure for the dynamic polarizability. The nonperturbative treatment is compared to perturbation theory expressions, as applied to a simple model system, the rigid ${mathrm{H}}_{2}$ molecule. It is shown that both approaches are equivalent for low field intensities, but the time-dependent treatment provides complementary information on the phase of the induced dipole moment, which allows for the definition of an uncertainty associated with the computation of the dynamic polarizability in the linear response regime." @default.
- W2015709666 created "2016-06-24" @default.
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- W2015709666 date "2010-06-23" @default.
- W2015709666 modified "2023-09-25" @default.
- W2015709666 title "Time-dependent response of dissipative electron systems" @default.
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- W2015709666 doi "https://doi.org/10.1103/physreva.81.063420" @default.
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