Ground-state entanglement in a three-spintransverse Ising model with energy current
Yong Zhang, Dan Liu, Long Gui-Lu
The ground-state entanglement associated with a three-spin transverse Ising model is studied. By introducing an energy current into the system, a quantum phase transition to energy-current phase may be presented with the variation of external magnetic field; and the ground-state entanglement varies suddenly at the critical point of quantum phase transition. In our model, the introduction of energy current makes the entanglement between any two qubits become maximally robust.
Chinese Physics•Jan 24, 2007•19 citations