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Article overview
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Critical Entanglement for the Half-Filled Extended Hubbard Model | | Jon Spalding
; Shan-Wen Tsai
; David K Campbell
; | | Date: |
26 Jan 2019 | | Abstract: | We study the ground state of the one-dimensional extended Hubbard model at
half-filling using the entanglement entropy calculated by Density Matrix
Renormalization Group (DMRG) techniques. We apply a novel curve fitting and
scaling method to accurately identify a $2^{nd}$ order critical point as well
as a Berezinskii-Kosterlitz-Thouless (BKT) critical point. Using open boundary
conditions and medium-sized lattices with very small truncation errors, we are
able to achieve similar accuracy to previous authors. We also report
observations of finite-size and boundary effects that can be remedied with
careful pinning. | | Source: | arXiv, 1901.9151 | | Services: | Forum | Review | PDF | Favorites | |
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