Two qubits state of two ranks The state express as PAC=|1)(1|+|2)(q2 Where 1 1)=Ao100 2}=A1ep0o)+A2|01+Aa210)+A4|1 o The minimizing discord can be obtained by purifying the state to a three-qubit pure state ABC)=A0|000+A1e010+A211) +Aa2110+1|11 Go In the state, the minimal conditional entropy of Ac system is equal to the entanglement of BC-system E(PBc)=min S(pcl L.X. Cen, et al., Phys. Rev. A 83, 054101(2011❖ The state express as ❖ Where ❖ The minimizing discord can be obtained by purifying the state to a three-qubit pure state: ❖ In the state, the minimal conditional entropy of AC￾system is equal to the entanglement of BC-system: ( )   min ( ) BC C A A E S i    = L.X.Cen, et.al., Phys. Rev. A 83, 054101 (2011) Two qubits state of two ranks