Entanglement in the Ground State of an Isotropic Three-Qubit Transverse XY Chain with Energy Current
Dan Liu, Yong Zhang, Yang Liu, Long Gui-Lu · Chinese Physics Letters · 2007
The ground state entanglement in an isotropic three-qubit transverse XY chain with energy current is analysed. A quantum phase transition from a no-energy-current phase to energy-current phase is found when the magnetic field changes. It has also been found that the ground state changes in company with the quantum phase transition.