Critical entanglement for the half-fIlled extended Hubbard model

Date
2019-05-24
Authors
Spalding, Jon
Tsai, Shan-Wen
Campbell, David K.
Version
Published version
OA Version
Citation
Jon Spalding, Shan-Wen Tsai, David Campbell. 2019. "Critical Entanglement for the Half-FIlled Extended Hubbard Model." Physical Review B, Volume 99, https://doi.org/10.1103/PhysRevB.99.195445
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 techniques. We apply curve fitting and scaling methods to accurately identify a second-order critical point as well as a Berezinskii-Kosterlitz-Thouless critical point. Using open boundary conditions and medium-sized lattices with very small truncation errors, we are able to achieve similar accuracy to that of previous authors. We also report observations of finite-size and boundary effects that can be remedied with careful pinning.
Description
License
©2019 American Physical Society. The final published version of this article appears in OpenBU by permission of the publisher.