Genuine Tripartite Entanglement in a Spin-Star Network at Thermal Equilibrium

Details Genuine Tripartite Entanglement in a Spin-Star Network at Thermal Equilibrium Genuine Tripartite Entanglement in a Spin-Star Network at Thermal Equilibrium

2010-10-08

arxiv.org/abs/1010.1684v2

Physical Review A 83, 042305 (2011)

Physics

Quantum Physics

8 pages, 13 figures

Scientific paper

10.1103/PhysRevA.83.042305

In a recent paper [M. Huber {\it et al}, Phys. Rev. Lett. {\bf 104}, 210501 (2010)] new criteria to find out the presence of multipartite entanglement have been given. We exploit these tools in order to study thermal entanglement in a spin-star network made of three peripheral spins interacting with a central one. Genuine tripartite entanglement is found in a wide range of the relevant parameters. A comparison between predictions based on the new criteria and on the tripartite negativity is also given.

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