Abstract:
The entanglement measure and local SU2 transformation of Bell bases are studied by utilizing SU2 transformation invariant. The entanglement measure of Bell bases that combinated linearly is discussed. The analysis results show that all Bell states are maximally entangled states, but they are two different local SU2 transformation invariant. The Bell states with same forms can become entangled bases, but the Bell states with different forms can not become entangled bases. Furthermore, it is found that arbitrary linear combination of maximally entangled states with same forms is also maximally entangled state.
