Entanglement in spin-1/2 dimerized Heisenberg systems

Details Entanglement in spin-1/2 dimerized Heisenberg systems Entanglement in spin-1/2 dimerized Heisenberg systems

2005-01-21

arxiv.org/abs/quant-ph/0501117v1

Physics

Quantum Physics

Four pages, three figures, accepted in Communications in Theoretical Physics

Scientific paper

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.

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