Use Jordan-Wigner transformation the eigenstates and eigenenergies of live qubits XX chain including external magnetic field are obtained. The concurrences Co,1 and Co,2 of ground state are obtained. For the ferromagn...Use Jordan-Wigner transformation the eigenstates and eigenenergies of live qubits XX chain including external magnetic field are obtained. The concurrences Co,1 and Co,2 of ground state are obtained. For the ferromagnetic, when [(√5 - 1)/2]|J| 〈 B ≤ |J|, the values of C0,1 and C0,2 are the same. The C0,2 is easily broken by temperature.展开更多
文摘Use Jordan-Wigner transformation the eigenstates and eigenenergies of live qubits XX chain including external magnetic field are obtained. The concurrences Co,1 and Co,2 of ground state are obtained. For the ferromagnetic, when [(√5 - 1)/2]|J| 〈 B ≤ |J|, the values of C0,1 and C0,2 are the same. The C0,2 is easily broken by temperature.