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
Experimentally Obtaining the Likeness of Two Unknown Qubits on a Nuclear-Magnetic-Resonance Quantum Information Processor
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
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.
XUE Fei;DU Jiang-Feng;ZHOU Xian-Yi;HAN Rong-Dian;WU Ji-Hui. Experimentally Obtaining the Likeness of Two Unknown Qubits on a Nuclear-Magnetic-Resonance Quantum Information Processor[J]. 中国物理快报, 2003, 20(10): 1669-1671.
XUE Fei, DU Jiang-Feng, ZHOU Xian-Yi, HAN Rong-Dian, WU Ji-Hui. Experimentally Obtaining the Likeness of Two Unknown Qubits on a Nuclear-Magnetic-Resonance Quantum Information Processor. Chin. Phys. Lett., 2003, 20(10): 1669-1671.
2003, Vol. 20 
