Mott insulator and superfluid phases in bosonic superlattices

3rd International Meeting for Researchers in Materials and Plasma Technology; 1st Symposium on Nanoscience and Nanotechnology

物理学;材料科学

Cruz, G.J.^1 ; Franco, R.^2 ; Silva-Valencia, J.^2

Universidad Santo Tomás, Bogotá, Colombia^1

Universidad Nacional de Colombia, Bogotá, Colombia^2

关键词: Critical region;    Density matrix renormalization group methods;    Ground state phase diagram;    Superfluid phase;    Superfluid phasis;    Unit cells;    Von Neumann entropy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/687/1/012065/pdf
DOI  :  10.1088/1742-6596/687/1/012065

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

We study the ground-state phase diagram of boson chains on a 2-period superlattice using the density matrix renormalization group method. New insulators for commensurate densities were found, differentiated by the arrangement of the particles in the unit cell, which was corroborated by analysis of the density versus the potential strength. Also, phase transitions between insulators for ρ ≥ 1 were seen, and a maximum in the behavior of the von Neumann entropy in the critical region was revealed, which suggests a superfluid phase between the insulators.