THERMAL ENTANGLEMENT IN THE TWO-QUBIT SYSTEMS CONSTRUCTED FROM THE YANG-BAXTER R-MATRIX
Some new Hamiltonians are constructed via the unitary Yang-Baxter matrices. R(i,i+1)(theta, phi) acting on a Hamiltonian H(0) which describes nearest spin-spin interaction. By the concept of concurrence, we explore the thermal entanglement of these systems. We find that the interaction of z-component of two neighboring spins g has great influences on the thermal entanglement. It not only influences the critical temperature T(c), but can also influence the critical magnetic field B(c).
thermal entanglement hamiltonian yang-baxter equation