Real-time electron dynamics with exact-exchange time-dependent density-functional theory

Details Real-time electron dynamics with exact-exchange time-dependent density-functional theory Real-time electron dynamics with exact-exchange time-dependent density-functional theory

2007-08-28

arxiv.org/abs/0708.3843v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.100.056404

The exact exchange potential in time-dependent density-functional theory is defined as an orbital functional through the time-dependent optimized effective potential (TDOEP) method. We numerically solve the TDOEP integral equation for the real-time nonlinear intersubband electron dynamics in a semiconductor quantum well with two occupied subbands. By comparison with adiabatic approximations, it is found that memory effects in the exact exchange potential become significant when the electron dynamics takes place in the vicinity of intersubband resonances.

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