A measure of tripartite entanglement in bosonic and fermionic systems

Details A measure of tripartite entanglement in bosonic and fermionic systems A measure of tripartite entanglement in bosonic and fermionic systems

2011-05-20

arxiv.org/abs/1105.4061v1

Phys. Rev. A 84, 022303 (2011)

Physics

Quantum Physics

19 pages, 3 figures

Scientific paper

10.1103/PhysRevA.84.022303

We describe an efficient theoretical criterion suitable for the evaluation of the tripartite entanglement of any mixed three-boson or -fermion state, based on the notion of the entanglement of particles for bipartite systems of identical particles. Our approach allows one to quantify the accessible amount of quantum correlations in the systems without any violation of the local particle number superselection rule. A generalization of the tripartite negativity is here applied to some correlated systems including the continuous-time quantum walks of identical particles (both for bosons and fermions) and compared with other criteria recently proposed in the literature. Our results show the dependence of the entanglement dynamics upon the quantum statistics: the bosonic bunching results into a low amount of quantum correlations while Fermi-Dirac statistics allows for higher values of the entanglement.

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