title: 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 J2) and dimerization (δ). 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 J2-δ plane. All the calculations in this work are based on numerical exact diagonalizations of finite systems.
authors: Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India. gvmldurgaprasad@sscu.iisc.ernet.in
authors: V M L Durga Prasad
authors: VM
authors: Goli
authors: Shaon
authors: S
authors: Sahoo
authors: S
authors: S
authors: Ramasesha
authors: Diptiman
authors: D
authors: Sen