Entanglement in Ising Chain with Inhomogeneous Magnetic Field  

作　　者：Cenk Akyfiz Ekrem Aydlner 

机构地区：[1]Theoretical and Computational Physics Research Group, Department of Physics, Dokuz Eyliil University, Faculty of Arts and Sciences, 35160-izmir, Turkey

出　　处：《Chinese Physics Letters》2008年第5期1557-1560,共4页中国物理快报（英文版）

摘　　要：We have numerically calculated the thermal entanglement of a two-qubit system at low temperatures in a isotropic Ising chain under an inhomogeneous magnetic field. It is shown that in the homogeneous magnetic field, the two- qubit system has entangled states. It is concluded that the presence of the inhomogeneity in the magnetic field plays an effective role on the entangled states. Finally, it is suggested that the inhomogeneity in the magnetic field can be used to create two separated entangled formations in a two-qubit system.We have numerically calculated the thermal entanglement of a two-qubit system at low temperatures in a isotropic Ising chain under an inhomogeneous magnetic field. It is shown that in the homogeneous magnetic field, the two- qubit system has entangled states. It is concluded that the presence of the inhomogeneity in the magnetic field plays an effective role on the entangled states. Finally, it is suggested that the inhomogeneity in the magnetic field can be used to create two separated entangled formations in a two-qubit system.

关 键 词：THERMAL ENTANGLEMENT QUANTUM COMPUTER BELL THEOREM CRYPTOGRAPHY SYSTEM COMPUTATION COUPLINGS MODELS STATE DOTS 

分 类 号：O441[理学—电磁学]