Long-distance entanglement in spin systems
arXiv:quant-ph/0604215 · doi:10.1103/PhysRevLett.96.247206
Abstract
Most quantum system with short-ranged interactions show a fast decay of entanglement with the distance. In this Letter, we focus on the peculiarity of some systems to distribute entanglement between distant parties. Even in realistic models, like the spin-1 Heisenberg chain, sizable entanglement is present between arbitrarily distant particles. We show that long distance entanglement appears for values of the microscopic parameters which do not coincide with known quantum critical points, hence signaling a transition detected only by genuine quantum correlations.
RevTex, 5 pages, 7 .eps figures Two references added in published version
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- Entanglement Resonance in Driven Spin Chains
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- Boundary effects to the entanglement entropy and two-site entanglement of the spin-1 valence-bond solid
- Analytic results on long distance entanglement mediated by gapped spin chains
- Hardcore dimer aspects of the SU(2) Singlet wavefunction
- Exact Solution of a Yang-Baxter Spin-1/2 Chain Model and Quantum Entanglement
- Entanglement and level crossings in frustrated ferromagnetic rings
- Entanglement of spin chains with general boundaries and of dissipative systems
- An Important Properties of Entanglement: Pairwise Entanglement can Only be Transferred by Entangled Pair
- An Ideal Channel of Long Distance Entanglement in Spin Systems
- Block Spin Density Matrix of the Inhomogeneous AKLT Model
- Effective mapping of spin-1 chains onto integrable fermionic models. A study of string and Neel correlation functions