Demonstration of Quantum Entanglement Control Using Nuclear Magnetic Resonance
XIE Jing-Yi1,2, ZHANG Jing-Fu3, DENG Zhi-Wei4, LU Zhi-Heng3
1Key Laboratory for Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
2Department of Materials Science and Engineering, and Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing 100875
3Department of Physics, Beijing Normal University, Beijing 100875
4Testing and Analytical Centre, Beijing Normal University, Beijing 100875
Demonstration of Quantum Entanglement Control Using Nuclear Magnetic Resonance
1Key Laboratory for Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
2Department of Materials Science and Engineering, and Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing 100875
3Department of Physics, Beijing Normal University, Beijing 100875
4Testing and Analytical Centre, Beijing Normal University, Beijing 100875
Abstract： With the two forms of the quantum entanglement control, the quantum entanglement swapping and preservation are demonstrated in a three-qubit nuclear magnetic resonance quantum computer. The pseudopure state is prepared to represent the quantum entangled states through macroscopic signals. Entanglement swapping is directly realized by a swap operation. By controlling the interactions between the system and its environment, we can preserve an initial entangled state for a longer time. The experimental results are in agreement with the experiment.
(Entanglement measures, witnesses, and other characterizations)
引用本文:
XIE Jing-Yi;ZHANG Jing-Fu;DENG Zhi-Wei;LU Zhi-Heng. Demonstration of Quantum Entanglement Control Using Nuclear Magnetic Resonance[J]. 中国物理快报, 2004, 21(12): 2343-2346.
XIE Jing-Yi, ZHANG Jing-Fu, DENG Zhi-Wei, LU Zhi-Heng. Demonstration of Quantum Entanglement Control Using Nuclear Magnetic Resonance. Chin. Phys. Lett., 2004, 21(12): 2343-2346.
2004, Vol. 21 
