The generalized t-V model in one dimension

International Conference on Strongly Correlated Electron Systems 2014

Szyniszewski, Marcin^1,2 ; Burovski, Evgeni^1

Physics Department, Lancaster University, Lancaster

LA1 4YB, United Kingdom^1

NoWNano DTC, University of Manchester, Manchester

M13 9PL, United Kingdom^2

关键词: Bethe ansatz;    Commensurate filling;    Density correlation;    Ground-state energies;    Integrable models;    Numerical results;    One dimension;    Strong coupling;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012057/pdf
DOI  :  10.1088/1742-6596/592/1/012057

来源: IOP

【 摘 要 】

We develop a systematic strong coupling approach for studying an extended t-V model with interactions of a finite range. Our technique is not based on the Bethe ansatz and is applicable to both integrable and non-integrable models. We illustrate our technique by presenting analytic results for the ground state energy (up to order 7 in t/V), the current density and density-density correlations for integrable and non-integrable models with commensurate filling factors. We further present preliminary numerical results for incommensurate non- integrable models.