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• W2053324113 abstract "The von Neumann entanglement entropy is studied with the density-matrix renormalization-group technique. We propose a simple approach to calculate the central charge using the entanglement entropy for a one-dimensional (1D) quantum system. This approach is applied to a couple of quantum systems: (i) a 1D frustrated spin model and (ii) a 1D half-filled spinless fermions with nearest-neighbor repulsion; it is confirmed that the central charge is estimated very accurately for the both systems. Also, a new method to determine the critical point between Tomonaga-Luttinger-liquid and gapped (or ordered) phases from the proposed approach is suggested. Furthermore, we mention that the Tomonaga-Luttinger parameter can be obtained in a like manner as the central charge, using the charge-density fluctuation of a part of the 1D system." @default.
• W2053324113 created "2016-06-24" @default.
• W2053324113 creator A5089437525 @default.
• W2053324113 date "2011-11-04" @default.
• W2053324113 modified "2023-09-26" @default.
• W2053324113 title "Tomonaga-Luttinger-liquid criticality: Numerical entanglement entropy approach" @default.
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• W2053324113 doi "https://doi.org/10.1103/physrevb.84.195108" @default.
• W2053324113 hasPublicationYear "2011" @default.
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