Improved Separability Criteria Based on Bloch Representation of Density Matrices

摘要

The correlation matrices or tensors in the Bloch representation of densitymatrices are encoded with entanglement properties. In this paper, based on theBloch representation of density matrices, we give some new separabilitycriteria for bipartite and multipartite quantum states. Theoretical analysisand some examples show that the proposed criteria can be more efficient thanthe previous related criteria.