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Experimentally Obtaining the Likeness of Two Unknown Qubits on a Nuclear-Magnetic-Resonance Quantum Information Processor |
| XUE Fei1;DU Jiang-Feng1;ZHOU Xian-Yi1;HAN Rong-Dian1;WU Ji-Hui2 |
| 1Department of Modern Physics, University of Science and Technology of China, Hefei 230027
2Laboratory of Structure Biology, University of Science and Technology of China, Hefei 230027 |
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| Cite this article: |
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XUE Fei, DU Jiang-Feng, ZHOU Xian-Yi et al 2003 Chin. Phys. Lett. 20 1669-1671 |
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Abstract We study the discrimination of quantum states from the other way around, i.e. the likeness of two quantum states. The fidelity is used to describe the likeness of two quantum states. Then we present a scheme to obtain the fidelity of two unknown qubits directly from the integral area of the spectra of the assistant qubit (spin) on a nuclear-magnetic-resonance quantum information processor. Finally we demonstrate the scheme on a three-qubit quantum information processor. The experimental data are consistent with the theoretical expectation with an average error of 0.05, which confirms the scheme.
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| Keywords:
03.67.Lx
82.56.-b
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Published: 01 October 2003
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| PACS: |
03.67.Lx
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(Quantum computation architectures and implementations)
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82.56.-b
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(Nuclear magnetic resonance)
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