%0 Journal Article %1 Wijewardane2008 %A Wijewardane, H. O. %A Ullrich, C. A. %D 2008 %I APS %J Physical Review Letters %K imported %N 5 %P 056404 %R 10.1103/PhysRevLett.100.056404 %T Real-Time Electron Dynamics with Exact-Exchange Time-Dependent Density-Functional Theory %U http://link.aps.org/abstract/PRL/v100/e056404 %V 100 %X 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. It is found that memory effects become significant in the vicinity of intersubband resonances.

@article{Wijewardane2008, abstract = {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. It is found that memory effects become significant in the vicinity of intersubband resonances.}, added-at = {2010-01-22T12:15:18.000+0100}, author = {Wijewardane, H. O. and Ullrich, C. A.}, biburl = {https://www.bibsonomy.org/bibtex/28102ed43441bcd0b70240e196278ba6b/myrta}, description = {Time dependent density functional theory; Memory effects kernel; breakdown adiabatic approximation}, doi = {10.1103/PhysRevLett.100.056404}, eid = {056404}, file = {:home/cfc/myrta/VirtualLibrary/MemoryKernel/PhysRevLett_100_056404.pdf:PDF}, interhash = {77935bae857ff28ecaf0c5dfe786623d}, intrahash = {8102ed43441bcd0b70240e196278ba6b}, journal = {Physical Review Letters}, keywords = {imported}, number = 5, numpages = {4}, pages = 056404, publisher = {APS}, review = {TDOEP vs TDKLI & AOEP (adiabatic) From numerical simulation: memory effects appears at high frequency and close to resonance, but they have little effect on the dynamic itsself BUT: <<Nonadiabatic effects should become more important for larger relative occupancies of upper levels, and in fre- quency regimes further above the lowest excitations.>> AND <<This suggests that for intrinsically nonadiabatic phenomena such as multiple excitations and dissipation one needs to go beyond exact exchange. Further exploration of orbital functionals thus remains an important task in TDDFT.>>}, timestamp = {2010-01-22T12:15:23.000+0100}, title = {Real-Time Electron Dynamics with Exact-Exchange Time-Dependent Density-Functional Theory}, url = {http://link.aps.org/abstract/PRL/v100/e056404}, volume = 100, year = 2008 }