Benchmarking the exponential ansatz for the Holstein model
Polarons are quasiparticles formed as a result of lattice distortions induced by charge carriers. The single-electron Holstein model captures the fundamentals of single polaron physics. We examine the power of the exponential ansatz for the polaron ground-state wavefunction in its coupled cluster, canonical transformation, and (canonically transformed) perturbative variants across the parameter space of the Holstein model. Our benchmark serves to guide future developments of polaron wavefunctions beyond the single-electron Holstein model.
Authors
- Junjie Yang (ORCID: https://orcid.org/0000-0002-6726-6538)
- Huanchen Zhai (ORCID: https://orcid.org/0000-0003-0086-0388)
- David R. Reichman (ORCID: https://orcid.org/0000-0002-5265-5637)
- Zhi‐Hao Cui (ORCID: https://orcid.org/0000-0002-7389-4063)
- Ankit Mahajan (ORCID: https://orcid.org/0000-0002-2138-3798)
- Garnet Kin‐Lic Chan (ORCID: https://orcid.org/0000-0001-8009-6038)
Institutions
- California Institute of Technology (US)
- Columbia University (US)
Publication Details
- Journal
- The Journal of Chemical Physics
- Published
- 2024-09-09
- DOI
- https://doi.org/10.1063/5.0225428
- Primary Topic
- Physics of Superconductivity and Magnetism
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- U.S. Department of Energy