1208.0706 (V. M. L. Durga Prasad Goli et al.)

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

V. M. L. Durga Prasad Goli, Shaon Sahoo, S. Ramasesha, Diptiman Sen

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 cross 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.

View original: http://arxiv.org/abs/1208.0706