Quantum Phases of Bose-Hubbard Model in Optical Superlattices
Bo-Lun Chen, Su-Peng Kou, Yunbo Zhang, Shu Chen
TL;DR
This paper investigates the complex quantum phase diagrams of multi-component Bose-Hubbard models in optical superlattices, revealing diverse charge and spin density wave orders through mean-field analysis.
Contribution
It introduces a detailed mean-field analysis of multi-component Bose-Hubbard models in superlattices, highlighting complex phase patterns and spin dynamics not previously characterized.
Findings
Phase diagrams show complex patterns and charge density waves.
Identification of spin density wave order in two-component systems.
Analysis of effective spin dynamics in strong-coupling regimes.
Abstract
In this paper, we analyze the quantum phases of multiple component Bose-Hubbard model in optical superlattices, using a mean-field method, the decoupling approximation. We find that the phase diagrams exhibit complected patterns and regions with various Charge Density Wave (CDW) for both one- and two- component cases. We also analyze the effective spin dynamics for the two-component case in strong-coupling region at unit filling, and show the possible existence of a Spin Density Wave (SDW) order.
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