Scientific Results

Critical properties and Renyi entropies of the spin-3/2 XXZ chain

Year: 2012

Authors: Dalmonte M., Ercolessi E., Taddia L.

Autors Affiliation: Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria; Dipartimento di Fisica dell’Universita\’ di Bologna and INFN, via Irnerio 46, 40126 Bologna, Italy; IFT UAM/CSIC, 28049 Cantoblanco, Madrid, Spain

Abstract: We discuss entanglement and critical properties of the spin-3/2 XXZ chain in its entire gapless region. Employing density-matrix renormalization-group calculations combined with different methods based on level spectroscopy, correlation functions, and entanglement entropies, we determine the sound velocity and the Luttinger parameter of the model as a function of the anisotropy parameter. Then, we focus on entanglement properties by systematically studying the behavior of Renyi entropies under both open and periodic boundary conditions, providing further evidence of recent findings about entanglement entropies of excited states in conformal field theory.

Journal/Review: PHYSICAL REVIEW B

Volume: 85 (16)      Pages from: 165112  to: 165112

More Information: We thank F. C. Alcaraz, S. Evangelisti, M. Ibanez, F. Ravanini, and G. Sierra for fruitful discussions, F. Ortolani for help with the DMRG code, and G. Ramirez for technical support. This work was supported in part by the INFN COM4 Grant No. NA41. M. D. acknowledges support by the European Commission via the integrated project AQUTE.
DOI: 10.1103/PhysRevB.85.165112

Citations: 22
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