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

Abstract

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.

8 pages, 13 figures

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Cited by in corpus (8)

• Quantum simulation of the central spin model with a Rydberg atom and polar molecules in optical tweezers
• Spin-chain-star systems: entangling multiple chains of spin qubits
• Dynamical pairwise entanglement and two-point correlations in the three-ligand spin-star structure
• Geometrical optimization of spin clusters for the preservation of quantum coherence
• Competition of Direct and Indirect Sources of Thermal Entanglement in a spin star network
• Logarithmic growth of peripheral entanglement concentrated via noisy measurements in a star network of spins
• Global quantum discord and von Neumann entropy in multipartite two-level atomic systems
• Synchronizing two superconducting qubits through a dissipating resonator