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    Critical entanglement for the half-fIlled extended Hubbard model

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    Date Issued
    2019-05-24
    Publisher Version
    10.1103/PhysRevB.99.195445
    Author(s)
    Spalding, Jon
    Tsai, Shan-Wen
    Campbell, David
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    Permanent Link
    https://hdl.handle.net/2144/40367
    Version
    Published version
    Citation (published version)
    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.
    Rights
    ©2019 American Physical Society. The final published version of this article appears in OpenBU by permission of the publisher.
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    • CAS: Physics: Scholarly Papers [356]
    • BU Open Access Articles [3730]


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