Examples

WARNING: THESE EXAMPLES ARE NOT CONVERGED! YOU MUST CONVERGE PARAMETERS (SIMULATION CELL SIZE, JASTROW PARAMETER NUMBER/CUTOFF, TWIST NUMBER, DMC TIME STEP, DFT PLANE WAVE CUTOFF, DFT K-POINT MESH, ETC.) FOR REAL CALCUATIONS!

The following examples should run in serial on a modern workstation in a few hours.

Using QMCPACK directly

In examples/molecules are the following examples. Each directory also contains a README file with more details.

Directory

Description

H20

H2O molecule from GAMESS orbitals

He

Helium atom with simple wavefunctions

Using Nexus

For more information about Nexus, see the User Guide in nexus/documentation.

For Python to find the Nexus library, the PYTHONPATH environment variable should be set to <QMCPACK source>/nexus/library. For these examples to work properly, the executables for QE and QMCPACK either need to be on the path, or the paths in the script should be adjusted.

These examples can be found under the nexus/examples/qmcpack directory.

Directory

Description

diamond

Bulk diamond with VMC

graphene

Graphene sheet with DMC

c20

C20 cage molecule

oxygen_dimer

Binding curve for O\(_2\) molecule

H2O

H\(_2\)O molecule with QE orbitals

LiH

LiH crystal with QE orbitals