For finite systems (atoms and molecules), excited states can be computed within TDDFT (Casida approach - only norm-conserving pseudopotentials). See the explanations given in the tddft lesson of tutorial. The iscf input variable must be set to -1.
In the non-spin-polarized case, spin-singlet as well as spin-triplet excitations are computed. Spin-polarized case is also available.
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Compulsory input variables:
... iscf [Integer for Self-Consistent-Field cycles]
Basic input variables:
... boxcenter [BOX CENTER]
Useful input variables:
... ixc [Index of eXchange-Correlation functional]
... td_maxene [Time-Dependent dft : MAXimal kohn-sham ENErgy difference]
... td_mexcit [Time-Dependent dft : Maximal number of EXCITations]
... %xclevel [eXchange Correlation functional LEVEL]
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tests/paral/Input: t05.in
tests/v2/Input: t42.in
tests/v3/Input: t55.in
tests/v5/Input: t61.in
t62.in
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