| 1 | NMR experimental implementation of threeparties quantum superdense coding显示文摘In this study, we report an experiment realization of quantum superdense coding (QSDC) between three parties using nuclear magnetic resonance (NMR). The experimental results have shown that in terms of the QSDC schemes between multiparties proposed by Liu et al. and Crudka et al., three-qubit QSDC can transmit three bits of classical information by sending two qubits only. Our results experimentally show that quantum superdense coding, as one of the quantum information processing protocols, is superior to classical ones. | WEIDaxiu YANGXiaodong LUOJun SUNXianping ZENGXizhi LIUMaili | 2004 | Chinese Science Bulletin2004，49，5： | 20 |
| 2 | NMR experimental realization of seven-qubit D-J algorithm and controlled phase-shift gates with improved precision显示文摘In this study, we report the experimental reali-zation of seven-qubit Deutsch-Jozsa (D-J) algorithm and controlled phase-shift gates with improved precision using liquid state nuclear magnetic resonance (NMR). Theexperimental results have shown that transformations Uf in the seven-qubit D-J algorithm have been implemented with different pulse sequences, and whether f is constant orbalanced is determined by using only a single function call(Uf). Furthermore, we propose an experimental method tomeasure and correct the error in the controlled phase-shift gate that is simple and feasible in experiments, and can have precise phase shifts. These may offer the possibility ofsurmounting the difficulties of low signal-to-noise ratio(SNR) in multi-qubit NMR quantum computers, morecomplicated experimental techniques, and the increase ofgate errors due to using a large number of imperfect selec-tive pulses. These are also applied to more complicated quantum algorithms with more qubits, such as quantumFourier transformation and Shor抯 algorithm. | WEIDaxiu LUOJun 等 | 2003 | Chinese Science Bulletin2003，48，3： | 6 |
您所在的机构暂未开通此部分的功能，请联系管理员