Phaseless auxiliary field quantum Monte Carlo with projector-augmented wave method for solids
- Author(s)
- Amir Taheridehkordi, Martin Schlipf, Zoran Sukurma, Moritz Humer, Andreas Grüneis, Georg Kresse
- Abstract
We implement the phaseless auxiliary field quantum Monte Carlo method using the plane-wave based projector augmented wave method and explore the accuracy and the feasibility of applying our implementation to solids. We use a singular value decomposition to compress the two-body Hamiltonian and, thus, reduce the computational cost. Consistent correlation energies from the primitive-cell sampling and the corresponding supercell calculations numerically verify our implementation. We calculate the equation of state for diamond and the correlation energies for a range of prototypical solid materials. A down-sampling technique along with natural orbitals accelerates the convergence with respect to the number of orbitals and crystal momentum points. We illustrate the competitiveness of our implementation in accuracy and computational cost for dense crystal momentum point meshes compared to a well-established quantum-chemistry approach, the coupled-cluster ansatz including singles, doubles, and perturbative triple particle-hole excitation operators.
- Organisation(s)
- Computational Materials Physics
- External organisation(s)
- VASP Software GmbH, Technische Universität Wien
- Journal
- Journal of Chemical Physics
- Volume
- 159
- No. of pages
- 14
- ISSN
- 0021-9606
- DOI
- https://doi.org/10.48550/arXiv.2304.14029
- Publication date
- 07-2023
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103006 Chemical physics
- ASJC Scopus subject areas
- Physics and Astronomy(all), Physical and Theoretical Chemistry
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/phaseless-auxiliary-field-quantum-monte-carlo-with-projectoraugmented-wave-method-for-solids(6076a988-93d1-488e-9e62-1e133d340a26).html