Ground-state entanglement in a three-spintransverse Ising model with energy current
Yong Zhang, Dan Liu, Long Gui-Lu · Chinese Physics · 2007
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.