Sufficient conditions of entanglement for tripartite and higher dimensional multipartite qubit density matrixes

In this paper we give the new sufficient conditions of entanglement for multipartite qubit density matrixes. Especially, we discuss in detail the case for tripartite qubit density matrixes. As a criteria in concrete application, its steps are quite simple and easy to operate. Some examples, discussions and the generalization to more high dimensional multipartite qubit density matrixes are given