Quantum correlation transfer through two parallel XXZ spin chains with phase shift control
- Department of Chemistry, School of Sciences, Beijing Institute of Technology, Beijing 100081 (China)
- Key Laboratory of Cluster Science of Ministry of Education and Department of Physics, School of Sciences, Beijing Institute of Technology, Beijing 100081 (China)
- Center for Computational Quantum Chemistry, South China Normal University, Guangzhou 510631 (China)
- Department of Theoretical Physics and History of Science, University of the Basque Country, Post Office Box 644, 48080 Bilbao (Spain)
Transmitting quantum states and entanglement through quantum channels is one of the key requirements for the development of quantum computation. Quantum discord has received much attention in quantum computation. We transfer quantum discord through two parallel XXZ spin chains with phase shift. The maximum discord can be enhanced by the phase shift. It will take more time to obtain an enhanced maximum discord in some cases, but for other cases, both the maximum and speed are enhanced by the phase shift. In the thermodynamic limit, the effect of the phase shift disappears and the maximum discord exponentially decays with increasing of the receiving position. Our results on spin chains are generalized to a family of linear Hamiltonians.
- OSTI ID:
- 22051278
- Journal Information:
- Physical Review. A, Vol. 84, Issue 1; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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