Quantum phases of dimerized and frustrated Heisenberg spin chains with s = 1/2, 1 and 3/2: an entanglement entropy and fidelity study

Abstract

We study here different regions in phase diagrams of the spin-1/2, spin-1 and spin-3/2 one dimensional antiferromagnetic Heisenberg systems with frustration (next-nearest-neighbor interaction $J_2$) and dimerization ($\delta$). In particular, we analyze the behaviors of the bipartite entanglement entropy and fidelity at the gapless to gapped phase transitions and across the lines separating different phases in the $J_2-\delta$ plane. All the calculations in this work are based on numerical exact diagonalizations of finite systems.

arXiv comment12 pages, 15 figures; provided some finite size analysis results, some changes in text accordingly; to appear in J. Phys.: Condens. Matter

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• Partial Multipartite Entanglement in the Matrix Product State Formalism
• Thermalization of a Dimerized Antiferromagnetic Spin Chain
• Bell-type correlation at quantum phase transitions in spin-1 chain
• Quantum phase transition in skewed ladders: an entanglement entropy and fidelity study