Entanglement entropies of the quarter filled Hubbard model

Journal article

We study Rényi and von Neumann entanglement entropies in the ground state of the one dimensional quarter-filled Hubbard model with periodic boundary conditions. We show that they exhibit an unexpected dependence on system size: for L = 4 mod 8 the results are in agreement with expectations based on conformal field theory, while for L = 0 mod 8 additional contributions arise. We show that these can be understood in terms of a 'shell-filling' effect and we develop a conformal field theory appro...

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Authors: Calabrese, P; Essler, F; Laeuchli, A

• Publication status: Published
• Publisher: Institute of Physics Publishing
• Journal: JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
• Volume: 2014
• Issue: 9
• Pages: P09025-P09025
• Publication date: 2014-09-01
• DOI: 10.1088/1742-5468/2014/09/P09025
• EISSN: 1742-5468
• ISSN: 1742-5468
• Language: English
• Keywords: quantum integrability (Bethe Ansatz); conformal field theory (theory); entanglement in extended quantum systems (theory); bosonisation