04-05-2011
Google Mac Ports and Fink, these along with the developer tool's installed will allow you to install many different command line tools and binaries.
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optking(1) optking(1)
cceom - equation of motion coupled cluster energy program
DESCRIPTION
The program cceom calculates EOM-CCSD energies using a Davidson algorithm to solve for the right-hand eigenvectors of the CC Hamiltonian.
COMMAND LINE ARGUMENTS
After internal coordinates are detected or generated, optking will enter a run-time mode dependent on command line arguments.
--dot_with_Lg - check the orthogonality of the excited right-hand eigenvector with
- the ground state left eigenvector, lambda. cclambda must be run
- first for this to work
REFERENCES
1. The equation of motion coupled-cluster method. A systematic biorthogonal approach to molecular excitation energies, transition
probabilities, and excited state properties, J. F. Stanton and R. J. Bartlett, J. Chem. Phys. 98, 7029 (1993).
EOM_REFERENCE = integer
specifies the algorithm used by cceom. useful for debugging. also must currently be set to ROHF, if you want to get triplet
excited states from a singlet ground state. The default is whatever "REFERENCE" is.
STATES_PER_IRREP = array of integers
specifies the number of states of each irreducible representation desired. For example, in C2v symmetry, (0 2 0 0) specifies two
excited states of A2 symmetry to be solved, regardless of the symmetry of the ground state.
PROP_SYM = integer
specifies the symmetry of the state that should be used to compute properties. defaults to the last irrep for which states are
requested.
PROP_ROOT = integer
specifies the number of the root (within its irrep) that should be used to compute properties. defaults to the highest root
requested.
EXCITATION_RANGE = excitation_range
used to generate initial guesses. the larger the value, the more initial guesses are made in the Davidson algorithm.
RESIDUAL_TOL = integer
Davidson algorithm will converge until the norm of the residual vector is less than 10^(-integer). default if 4.
EVAL_TOL = integer
Davidson algorithm will converge until the change in the excitation energy is less than 10^(-integer). default if 6.
Sept 2002 optking(1)