Benchmarking the exponential ansatz for the Holstein model.

IF 3.1 2区 化学 Q3 CHEMISTRY, PHYSICAL Journal of Chemical Physics Pub Date : 2024-09-14 DOI:10.1063/5.0225428
Junjie Yang, Zhi-Hao Cui, Ankit Mahajan, Huanchen Zhai, David R Reichman, Garnet Kin-Lic Chan
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Abstract

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.

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霍尔斯坦模型的指数解析基准。
极子是电荷载流子引起晶格畸变而形成的准粒子。单电子霍尔施泰因模型捕捉到了单极子物理学的基本原理。我们考察了极子基态波函数在霍尔施泰因模型参数空间中的耦合簇、典型变换和(典型变换的)扰动变体中的指数解析能力。我们的基准有助于指导极子波函数在单电子霍尔斯坦模型之外的未来发展。
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来源期刊
Journal of Chemical Physics
Journal of Chemical Physics 物理-物理:原子、分子和化学物理
CiteScore
7.40
自引率
15.90%
发文量
1615
审稿时长
2 months
期刊介绍: The Journal of Chemical Physics publishes quantitative and rigorous science of long-lasting value in methods and applications of chemical physics. The Journal also publishes brief Communications of significant new findings, Perspectives on the latest advances in the field, and Special Topic issues. The Journal focuses on innovative research in experimental and theoretical areas of chemical physics, including spectroscopy, dynamics, kinetics, statistical mechanics, and quantum mechanics. In addition, topical areas such as polymers, soft matter, materials, surfaces/interfaces, and systems of biological relevance are of increasing importance. Topical coverage includes: Theoretical Methods and Algorithms Advanced Experimental Techniques Atoms, Molecules, and Clusters Liquids, Glasses, and Crystals Surfaces, Interfaces, and Materials Polymers and Soft Matter Biological Molecules and Networks.
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