Genuine tripartite entanglement monotone of $(2\otimes 2\otimes n)-$   dimensional systems
  A genuine tripartite entanglement monotone is presented for $(2\otimes 2\otimes n)$-dimensional tripartite pure states by introducing a new entanglement measure for bipartite pure states. As an application, we consider the genuine tripartite entanglement of the ground state of the exactly solvable isotropic spin-1/2 chain with three-spin interaction. It is shown that the singular behavior of the genuine tripartite entanglement exactly signals a quantum phase transition. 
Chang-shui Yu, L. Zhou, He-shan Song