The βexpansion of the D=1 fermionic spinless Hubbard model off the halffilling regime
Abstract
We found that when the spinless model is off the halffilling regime ($\mu \neq V$), the Helmholtz free energy (HFE) can be written as two $\beta$expansions: one expansion comes from the halffilling configuration and another one that depends on the parameter $x = \mu  V$. We show numerically that the chemical potential as a function of temperature satisfies a relation similar to the one derived from the particlehole symmetry of the fermionic spinless model. We extend the $\beta$expansion of the HFE of the onedimensional fermionic spinless Hubbard model up to order $\beta^8$.
 Publication:

Condensed Matter Physics
 Pub Date:
 September 2015
 DOI:
 10.5488/CMP.18.33003
 arXiv:
 arXiv:1510.06531
 Bibcode:
 2015CMPh...1833003C
 Keywords:

 Condensed Matter  Strongly Correlated Electrons
 EPrint:
 12 pages, 3 figures