Variational Monte Carlo method for the Baeriswyl wave function: Application to the one-dimensional bosonic Hubbard model

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016-05-25

Autores

B. Hetényi (Autor) Outra; B. Tanatar (Autor) Outra; L. M. Martelo (Autor) FEUP

Revista

Título: Physical Review B

Vol. Vol. 93

Páginas: 174518-1-174518-6

ISSN: 2469-9950

Editora: American Physical Society

Indexação

ISI Web of Knowledge

Classificação Científica

CORDIS: Ciências Físicas > Física > Propriedades da matéria condensada

FOS: Ciências exactas e naturais > Física

Outras Informações

DOI: 10.1103/PhysRevB.93.174518

Abstract (EN): A variational Monte Carlo method for bosonic lattice models is introduced. The method is based on the Baeriswyl projected wave function. The Baeriswyl wave function consists of a kinetic energy based projection applied to the wave function at infinite interaction, and is related to the shadow wave function already used in the study of continuous models of bosons. The wave function at infinite interaction, and the projector, are represented in coordinate space, leading to an expression for expectation values which can be evaluated via Monte Carlo sampling. We calculate the phase diagram and other properties of the bosonic Hubbard model. The calculated phase diagram is in excellent agreement with known quantum Monte Carlo results. We also analyze correlation functions.

Tipo (Avaliação Docente): Científica