Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevA.72.062302
Title: Three-qubit thermal entanglement via entanglement swapping on two-qubit Heisenberg XY chains
Authors: Kao, Z.C.
Ng, J.
Yeo, Y. 
Issue Date: Dec-2005
Citation: Kao, Z.C., Ng, J., Yeo, Y. (2005-12). Three-qubit thermal entanglement via entanglement swapping on two-qubit Heisenberg XY chains. Physical Review A - Atomic, Molecular, and Optical Physics 72 (6) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.72.062302
Abstract: In this paper, we consider the generation of a three-qubit Greenberger-Horne-Zeilinger-like thermal state by applying the entanglement swapping scheme of Zukowski [Ann. N. Y. Acad. Sci. 755, 91 (1995)] to three pairs of two-qubit Heisenberg XY chains. The quality of the resulting three-qubit entanglement is studied by analyzing the teleportation fidelity, when it is used as a resource in the teleportation protocol of Karlsson [Phys. Rev. A 58, 4394 (1998)]. We show that even though thermal noise in the original two-qubit states is amplified by the entanglement swapping process, we are still able to achieve nonclassical fidelities for the anisotropic Heisenberg XY chains at finitely higher and higher temperatures by adjusting the strengths of an external magnetic field. This has a positive implication on the solid-state realization of a quantum computer. © 2005 The American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/98404
ISSN: 10502947
DOI: 10.1103/PhysRevA.72.062302
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