Entanglement in spin-1/2 dimerized Heisenberg systems
arXiv:quant-ph/0501117 · doi:10.1088/0253-6102/43/6/015
Abstract
We study entanglement in dimerized Heisenberg systems. In particular, we give exact results of ground-state pairwise entanglement for the four-qubit model by identifying a Z_2 symmetry. Although the entanglements cannot identify the critical point of the system, the mean entanglement of nearest-neighbor qubits really does, namely, it reaches a maximum at the critical point.
Four pages, three figures, accepted in Communications in Theoretical Physics
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- Two-Point Versus Multipartite Entanglement in Quantum Phase Transitions
- Entanglement properties in (1/2,1) mixed-spin Heisenberg systems
- The Entanglement in Anisotropic Heisenberg XYZ Chain with inhomogeneous magnetic field
- Entanglement oscillations in open Heisenberg chains
- Entanglement signatures for the dimerization transition in the Majumdar-Ghosh model