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| 1 | Experimental long-distance quantum secure direct communication显示文摘Quantum secure direct communication(QSDC) is an important quantum communication branch, which realizes the secure information transmission directly without encryption and decryption processes.Recently, two table-top experiments have demonstrated the principle of QSDC. Here, we report the first long-distance QSDC experiment, including the security test, information encoding, fiber transmission and decoding. After the fiber transmission of 0.5 km, quantum state fidelities of the two polarization entangled Bell states are 91% and 88%, respectively, which are used for information coding. We theoretically analyze the performance of the QSDC system based on current optical communication technologies,showing that QSDC over fiber links of several tens kilometers could be expected. It demonstrates the potential of long-distance QSDC and supports its future applications on quantum communication networks. | Feng Zhu Wei Zhang Yubo Sheng Yidong Huang | 2017 | Science Bulletin2017，62，22： | 25 |
| 2 | Multipartite entanglement concentration for nitrogen-vacancy center and microtoroidal resonator system显示文摘We describe a high efcient entanglement concentration protocol(ECP)for multi-particle less-entangled nitrogen-vacancy(N-V)center and microtoroidal resonator system.In the ECP,we only require one pair of less-entangled state,two auxiliary N-V center in microcavities and some single photons.After the photon passing through the microcavity,by measuring the polarization of the photon,a maximally entangled W state can be obtained with some success probability.This ECP does not need to destroy the solid qubit,which makes it more feasible.Moreover,by resorting to more single photons,it can be repeated to reach a high success probability.These features make this ECP useful in current long-distance quantum communications. | SHENG YuBo LIU Jiong ZHAO ShengYang ZHOU Lan | 2013 | Chinese Science Bulletin2013，58，28： | 10 |
| 3 | Efficient N-particle W state concentration with different parity check gates显示文摘We present a universal way to concentrate an arbitrary N-particle less-entangled W state into a maximally entangled W state with different parity check gates.It comprises two protocols.The first protocol is based on the linear optical elements,say the partial parity check gate and the second protocol uses the quantum nondemolition measurement to construct the complete parity check gate.Both protocols can achieve the concentration task.These protocols have several advantages.First,they can obtain a maximally entangled W state only with the help of some single photons,which greatly reduces the number of entanglement resources.Second,in the first protocol,only linear optical elements are required,which is feasible with current techniques.Third,the second protocol can be repeated to perform the concentration step and obtain a higher success probability.All these advantages make it quite useful in current quantum communication and computation applications. | SHENG YuBo PAN Jun GUO Rui ZHOU Lan WANG Lei | 2015 | Science China(Physics,Mechanics & Astronomy)2015，58，6： | 4 |
| 4 | High-Voltage Safety Improvement Design for Electric Vehicle in Rear Impact显示文摘High voltage safety is very important for electric vehicles, how to ensure the passengers’ safety in traffic accidents is animportant research subject. This paper describes a study of the high-voltage safety of an electric vehicle under rear impactconditions to ensure that it is in accordance with Chinese regulations. The high-voltage safety has been analyzed and optimizedfrom several perspectives and includes the development of a high-voltage cutoff strategy, assessment of the integrity of thehigh-voltage components after the crash, the layout of the high-voltage and low-voltage cables, and the crashworthiness ofthe structure. This study resolved the high-voltage safety problems that were found in the design phase and thus ensured thatthe vehicle not only meets the requirements of the Chinese regulations, but also meets the high-voltage safety requirementsof US Federal Motor Vehicle Safety Standard (FMVSS) 305 for 80 km/h rear impact. | Yubo Lian Dong Zeng Sheng Ye Binggen Zhao Haizhang Wei | 2018 | Automotive Innovation2018，1，3： | 2 |
| 5 | Flow patterns and wall shear stress distribution in human internal carotid arteries: The geometric effect on the risk for stenoses显示文摘 | Chi Zhang Sheng Xie Shuyu Li Fang Pu Xiaoyan Deng Yubo Fan Deyu Li | 2011 | Journal of Biomechanics2011，，1： | 1 |
| 6 | Efficient entanglement purification for doubly entangled photon state显示文摘In this paper,we present an efficient purification scheme that improves the efficiency of entanglement purification of the recently proposed entanglement purification scheme for doubly entangled photon states (Phys.Rev.A,2008,77:042315).This modified scheme contains the bit-flip error correction where all the photon pairs can be kept while all the bit-flip errors are corrected and the entanglement purification of phase-flip errors where a wavelength conversion process is used.This scheme has the advantage of high efficiency and a much lower minimum fidelity of the original state.It works under existing technology. | WANG Chuan SHENG YuBo LI XiHan DENG FuGuo ZHANG Wei LONG GuiLu | 2009 | Science China(Technological Sciences)2009，52，12： | 1 |
| 7 | Comparative study on hemodynamic environments around patient-specific carotid atherosclerotic plaques with different symmetrical features显示文摘Atherosclerotic plaque near the carotid sinus is a key risk factor for ischemic stroke.Although disturbed hemodynamic environments around atherosclerotic plaque had been investigated in many studies,the effect of their symmetrical features,especially longitudinal asymmetrical characteristics,had not been comparatively studied.In this study,three-dimensional carotid bifurcation models were established based on CT images of three patients with 50%stenosis and with different symmetrical features of carotid atherosclerotic plaques including concentric plaque,eccentric plaque,or eccentric longitudinal asymmetrical plaque.A healthy subject was chosen as the control.Wall shear stress(WSS)and oscillating shear index in the regions of upstream,downstream,downstream shoulders and regions around the point of maximum stenosis were analyzed.The results indicated that the maximum WSS around the eccentric longitudinal asymmetrical plaque were 8.6 times larger than that of the eccentric plaque and 1.9 times larger than that of the concentric plaque.And the distributions of WSS and OSI around the eccentric longitudinal asymmetric plaque were more disordered than those of the others.Our results highlighted the risk of the eccentric longitudinal asymmetrical plaque on plaque development and rupture and might provide a new index for evaluating the development of atherosclerosis. | Xianghui Gong Zhuqing Liang Yawei Wang Chi Zhang Sheng Xie Yubo Fan | 2021 | Medicine in Novel Technology and Devices2021，，3： | 0 |
| 8 | Quantum-enhanced interferometry with asymmetric beam splitters显示文摘In this paper,we investigate the phase sensitivities in two-path optical interferometry with asymmetric beam splitters.Here,we present the optimal conditions for the transmission ratio and the phase of the beam splitter to gain the highest sensitivities for a general class of non-classical states with parity symmetry.Additionally,we address the controversial question of whether the scheme with a combination of coherent state and photon-added or photon-subtracted squeezed vacuum state is better or worse than the most celebrated one using a combination of coherent state and squeezed vacuum state. | Wei Zhong Fan Wang Lan Zhou Peng Xu YuBo Sheng | 2020 | Science China(Physics,Mechanics & Astronomy)2020，63，6： | 0 |
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