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Hypertext Dalton 2.0 manual - Theoretical Chemistry, KTH

Hypertext Dalton 2.0 manual - Theoretical Chemistry, KTH

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CHAPTER 27. COUPLED-CLUSTER CALCULATIONS, CC 292<br />

27.1 General input for CC: *CC INPUT<br />

In this section keywords for the coupled cluster program are defined. In particular the<br />

coupled cluster model(s) and other parameters common to all submodules are specified.<br />

.B0SKIP Skip the calculation of the B0-vectors in a restarted run. See comments under<br />

.IMSKIP.<br />

.CC(2) Run calculation for non-iterative CC2 excitation energy model (which is actually<br />

the well-known CIS(D) model).<br />

.CC(3) Run calculation for CC(3) ground state energy model.<br />

.CC(T) Run calculation for CCSD(T) (Coupled Cluster Singles and Doubles with perturbational<br />

treatment of triples) model.<br />

.CC2 Run calculation for CC2 model.<br />

.CC3 Run calculation for CC3 model.<br />

.CCD Run calculation for Coupled Cluster Doubles (CCD) model.<br />

.CIS Run calculation for CI Singles (CIS) method.<br />

.CCR(3) Run calculation for CCSDR(3) excitation energy model.<br />

.CCS Run calculation for Coupled Cluster Singles (CCS) model.<br />

.CCSD Run calculation for Coupled Cluster Singles and Doubles (CCSD) model.<br />

.CCSTST Test option which runs the CCS finite field calculation as a pseudo CC2 calculation.<br />

CCSTST disables all terms which depend on the double excitation amplitudes or<br />

multipliers. This flag must be set for CCS finite field calculations.<br />

.DEBUG Test option: print additional debug output.<br />

.E0SKIP Skip the calculation of the E0-vectors in a restarted run.<br />

.IMSKIP.<br />

See comment under<br />

.F1SKIP Skip the calculation of F-matrix transformed first-order cluster amplitude responses<br />

in a restarted run. See comment under .IMSKIP.<br />

.F2SKIP Skip the calculation of F-matrix transformed second-order cluster amplitude responses<br />

in a restarted run. See comment under .IMSKIP.

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