Entanglement in the Ground State of an Isotropic Three-Qubit Transverse XY Chain with Energy Current
LIU Dan1,2, ZHANG Yong3, LIU Yang1,2, LONG Gui-Lu1,2
1Key Laboratory for Atomic and Molecular Nanosciences and Department of Physics, Tsinghua University, Beijing 100084
2Tsinghua National Laboratory For Information Science and Technology, Beijing 100084
3Institute of Physics, School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876
Entanglement in the Ground State of an Isotropic Three-Qubit Transverse XY Chain with Energy Current
LIU Dan1,2;ZHANG Yong3;LIU Yang1,2;LONG Gui-Lu1,2
1Key Laboratory for Atomic and Molecular Nanosciences and Department of Physics, Tsinghua University, Beijing 100084
2Tsinghua National Laboratory For Information Science and Technology, Beijing 100084
3Institute of Physics, School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876
Abstract： 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.
(Entanglement measures, witnesses, and other characterizations)
引用本文:
LIU Dan;ZHANG Yong;LIU Yang;LONG Gui-Lu;. Entanglement in the Ground State of an Isotropic Three-Qubit Transverse XY Chain with Energy Current[J]. 中国物理快报, 2007, 24(1): 8-10.
LIU Dan, ZHANG Yong, LIU Yang, LONG Gui-Lu,. Entanglement in the Ground State of an Isotropic Three-Qubit Transverse XY Chain with Energy Current. Chin. Phys. Lett., 2007, 24(1): 8-10.
2007, Vol. 24 
