Tripartite thermal correlations in an inhomogeneous spin-star system

Abstract

We exploit the tripartite negativity to study the thermal correlations in a tripartite system, that is the three outer spins interacting with the central one in a spin-star system. We analyze the dependence of such correlations on the homogeneity of the interactions, starting from the case where central-outer spin interactions are identical and then focusing on the case where the three coupling constants are different. We single out some important differences between the negativity and the concurrence.

8 pages, 9 figures

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• A measure of tripartite entanglement in bosonic and fermionic systems
• 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
• Entanglement generation between distant spins via quasilocal reservoir engineering
• Dynamical pairwise entanglement and two-point correlations in the three-ligand spin-star structure
• 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
• Synchronizing two superconducting qubits through a dissipating resonator
• Two-spin and multi-spin quantum entanglement in V12 polyoxovanadate molecular nanomagnet