Skip to content
Sections
>> Trisquel >> Pakete >> etiona >> libs >> libchemps2-2
etiona  ]
[ Quellcode: chemps2  ]

Paket: libchemps2-2 (1.8.5-1)

Links für libchemps2-2

libchemps2-2

Trisquel-Ressourcen:

Quellcode-Paket chemps2 herunterladen:

Betreuer:

Original Maintainers:

Externe Ressourcen:

Ähnliche Pakete:

Spin-adapted DMRG for ab initio quantum chemistry

chemps2 is a scientific library which contains a spin-adapted implementation of the density matrix renormalization group (DMRG) for ab initio quantum chemistry. This wavefunction method allows one to obtain numerical accuracy in active spaces beyond the capabilities of full configuration interaction (FCI), and allows one to extract the 2-, 3-, and 4-particle reduced density matrices (2-, 3- and 4-RDM) of the active space.

For general active spaces up to 40 electrons in 40 orbitals can be handled with DMRG, and for one-dimensional active spaces up to 100 electrons in 100 orbitals. The 2-RDM of these active spaces can also be easily extracted, while the 3- and 4-RDM are limited to about 28 orbitals.

When the active space size becomes prohibitively expensive for FCI, DMRG can be used to replace the FCI solver in the complete active space self consistent field (CASSCF) method and the corresponding complete active space second order perturbation theory (CASPT2). The corresponding methods are called DMRG-SCF and DMRG-CASPT2, respectively. For DMRG-SCF the active space 2-RDM is required, and for DMRG-CASPT2 the active space 4-RDM.

Andere Pakete mit Bezug zu libchemps2-2

  • hängt ab von
  • empfiehlt
  • schlägt vor
  • sug: chemps2-doc
    Documentation of the libchemps2-2 package

libchemps2-2 herunterladen

Download für alle verfügbaren Architekturen
Architektur Paketgröße Größe (installiert) Dateien
amd64 504,5 kB1560 kB [Liste der Dateien]
i386 473,2 kB1702 kB [Liste der Dateien]