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Multipartite entanglement in fermionic systems via a geometric measure
Physical Review A. Atomic, Molecular, and Optical Physics
We study multipartite entanglement in a system consisting of indistinguishable fermions. Specifically, we have proposed a geometric entanglement measure for N spin-1/2 fermions distributed over 2L modes (single particle states). The measure is defined on the 2L qubit space isomorphic to the Fock space for 2L single particle states. This entanglement measure is defined for a given partition of 2L modes containing m >= 2 subsets. Thus this measure applies to m <= 2L partite fermionic system wheredoi:10.1103/physreva.82.062302 fatcat:rwyvsivm65baxjcj62wqb6baja