1. The DIRAC code for relativistic molecular calculations.
- Author
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Saue, Trond, Bast, Radovan, Gomes, André Severo Pereira, Jensen, Hans Jørgen Aa., Visscher, Lucas, Aucar, Ignacio Agustín, Di Remigio, Roberto, Dyall, Kenneth G., Eliav, Ephraim, Fasshauer, Elke, Fleig, Timo, Halbert, Loïc, Hedegård, Erik Donovan, Helmich-Paris, Benjamin, Iliaš, Miroslav, Jacob, Christoph R., Knecht, Stefan, Laerdahl, Jon K., Vidal, Marta L., and Nayak, Malaya K.
- Subjects
COUPLED-cluster theory ,TIME reversal ,DENSITY matrices ,ALGEBRA ,QUATERNIONS ,SOLVATION ,SYMMETRY - Abstract
DIRAC is a freely distributed general-purpose program system for one-, two-, and four-component relativistic molecular calculations at the level of Hartree–Fock, Kohn–Sham (including range-separated theory), multiconfigurational self-consistent-field, multireference configuration interaction, electron propagator, and various flavors of coupled cluster theory. At the self-consistent-field level, a highly original scheme, based on quaternion algebra, is implemented for the treatment of both spatial and time reversal symmetry. DIRAC features a very general module for the calculation of molecular properties that to a large extent may be defined by the user and further analyzed through a powerful visualization module. It allows for the inclusion of environmental effects through three different classes of increasingly sophisticated embedding approaches: the implicit solvation polarizable continuum model, the explicit polarizable embedding model, and the frozen density embedding model. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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