Multipartite entanglement in spin chains

Details Multipartite entanglement in spin chains Multipartite entanglement in spin chains

2005-02-24

arxiv.org/abs/quant-ph/0502160v3

New J. Phys. 7, 229 (2005)

Physics

Quantum Physics

5 pages, 1 figure, to appear in New J. Phys

Scientific paper

10.1088/1367-2630/7/1/229

We investigate the presence of multipartite entanglement in macroscopic spin
chains. We discuss the Heisenberg and the XY model and derive bounds on the
internal energy for systems without multipartite entanglement. Based on this we
show that in thermal equilibrium the above mentioned spin systems contain
genuine multipartite entanglement, even at finite modest temperatures.

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