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Why quantum adiabatic computation and D-Wave computers are so attractive?

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Science Bulletin 2017年第11期62卷 741-742页

作者： zhangqi yin Zhaohui Wei Center for Quantum Information Institute for Interdisciplinary Information SciencesTsinghua University Centre for Quantum Technologies National University of Singapore School of Physical and Mathematical Sciences Nanyang Technological University

Because of the possibility that improves our computational capability dramatically,in the past two decades quantum computation has been attracting more and more ***,in recent years remarkable progresses have been made for theoretical researches and experimental implementations in this area,which will probably bring us quantum computer able to beat

关键词：量子计算机绝热计算吸引力计算能力实验实现

Second-order magnetic field gradient-induced strong coupling between nitrogen-vacancy centers and a mechanical oscillator

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Science China(Physics,Mechanics & Astronomy) 2017年第7期60卷 17-24页

作者： Kang Cai RuiXia Wang zhangqi yin GuiLu Long State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing 100084 China Center for Quantum Information Institute for Interdisciplinary Information Sciences Tsinghua University Beijing 100084 China Tsinghua National Laboratory of Information Science and Technology Beijing 100084 China Collaborative Innovation Center of Quantum Matter Beijing 100084 China

We consider a cantilever mechanical oscillator(MO) made of diamond. A nitrogen-vacancy(NV) center lies at the end of the cantilever. Two magnetic tips near the NV center induce a strong second-order magnetic field gradient. Under coherent driving of the MO, we find that the coupling between the MO and the NV center is greatly enhanced. We studied how to generate entanglement between the MO and the NV center and realize quantum state transfer between them. We also propose a scheme to generate two-mode squeezing between different MO modes by coupling them to the same NV center. The decoherence and dissipation effects for both the MO and the NV center are numerically calculated using the present parameter values of the experimental configuration. We have achieved high fidelity for entanglement generation, quantum state transfer, and large twomode squeezing.

关键词： second-order magnetic field gradient NV center mechanical oscillator entanglement state transfer squeezing

Entangling two levitated charged nanospheres through Coulomb interaction

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Chinese Physics B 2024年第7期33卷 352-359页

作者：李国耀尹璋琦 Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements(MOE) School of PhysicsBeijing Institute of TechnologyBeijing 100081China

Limited by the thermal environment, the entanglement of a massive object is extremely difficult to generate. Based on a coherent scattering mechanism, we propose a scheme to generate the entanglement of two optically levitated nanospheres through the Coulomb interaction. Two nanospheres are charged and coupled to each other through the Coulomb *** this manner, the entanglement of two nanospheres is induced either under a weak/strong optomechanical coupling regime or under an ultra-strong optomechanical coupling regime. The charges, radius and distance of the two nanospheres are taken into consideration to enhance the Coulomb interaction, thereby achieving a higher degree of entanglement in the absence of ground-state cooling. The corresponding maximum entanglement can be attained as the dynamics of the system approaches the boundary between the steady and the unsteady regimes. This provides a useful resource for both quantum-enhanced sensing and quantum information processing, as well as a new platform for studying many-body physics.

关键词： quantum entanglement coherent scattering Coulomb interaction

NMRCloudQ： a quantum cloud experience on a nuclear magnetic resonance quantum computer

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Science Bulletin 2018年第1期63卷 17-23页

作者： Tao Xin Shilin Huang Sirui Lu Keren Li Zhihuang Luo zhangqi yin Jun Li Dawei Lu Guilu Long Bei Zeng Department of Physics Tsinghua University Beijing 100084 China Center for Quantum Information Institute for Interdiscriplinary Information Sciences Tsinghua University Belting 100084 China Beijing Computational Science Research Center Beijing 100193 China Institute for Quantum Computing University of Waterloo waterloo N2L 3C1 Ontario Canada Department of Physics and Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen 518055 China The Innovative Center of Quantum Matter Beijing 100084 China Department of Mathematics and Statistics University of Guelph Guelph N1C 2W1 Ontario Canada

Cloud-based quantum computing is anticipated to be the most useful and reachable form for public users to experience with the power of quantum. As initial attempts, IBM Q has launched influential cloud services on a superconducting quantum processor in 2016, but no other platforms has followed up yet. Here,we report our new cloud quantum computing service – NMRCloud Q(http://***/zh-hans/),where nuclear magnetic resonance, one of the pioneer platforms with mature techniques in experimental quantum computing, plays as the role of implementing computing tasks. Our service provides a comprehensive software environment preconfigured with a list of quantum information processing packages,and aims to be freely accessible to either amateurs that look forward to keeping pace with this quantum era or professionals that are interested in carrying out real quantum computing experiments in person. In our current version, four qubits are already usable with in average 99.10% single-qubit gate fidelity and 97.15% two-qubit fidelity via randomized benchmaking tests. Improved control precisions as well as a new seven-qubit processor are also in preparation and will be available later.

关键词： Quantum cloud Nuclear magnetic resonance Gradient ascent pulse engineering Randomized benchmarking

Demonstration of an ultra-low-threshold phonon laser with coupled microtoroid resonators in vacuum

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Photonics Research 2017年第2期5卷 73-76页

作者： GUANZHONGWANG MINGMING ZHAO yinGCHUN QIN zhangqi yin XIAOSHUN JIANG MIN XIAO National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences Nanjing University Center for Quantum Information Institute for Interdisciplinary Information Sciences Tsinghua University Department of Physics University of Arkansas

We demonstrate an ultra-low-threshold phonon laser using a coupled-microtoroid-cavity system by introducing a novel coupling *** scheme exhibits both high optical quality factors and high mechanical quality *** have experimentally obtained the mechanical quality factor up to 18,000 in vacuum for a radialbreathing mode of 59.2 *** measured phonon lasing threshold is as low as 1.2μW,which is～5 times lower than the previous result.

关键词： mode Demonstration of an ultra-low-threshold phonon laser with coupled microtoroid resonators in vacuum

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反馈压缩冷却光力学振子突破精度极限

中国科学：物理学、力学、天文学 2024年第2期54卷 146-148页

作者：尹璋琦北京理工大学物理学院量子技术研究中心先进光电量子结构设计与测量教育部重点实验室北京100081

近年来光力学反馈冷却技术对于提升光力学的测量精度以及实现宏观量子叠加均发挥了重要的推动作用.但是传统测量反馈冷却技术受限于测量噪声.最近的研究结合并同时优化了矢量探测反馈冷却与参量压缩技术,不仅突破了传统反馈冷却技术的极... 详细信息

近年来光力学反馈冷却技术对于提升光力学的测量精度以及实现宏观量子叠加均发挥了重要的推动作用.但是传统测量反馈冷却技术受限于测量噪声.最近的研究结合并同时优化了矢量探测反馈冷却与参量压缩技术,不仅突破了传统反馈冷却技术的极限,也突破了参量压缩的3 d B极限,实现了超过30 d B的热噪声抑制.

关键词：光力学压缩态反馈冷却

基于回音壁模式微腔激光器的痕量生化成分检测

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科学通报 2022年第33期67卷 3941-3953页

作者：麻霁阳赵清尹璋琦北京理工大学物理学院量子技术研究中心先进光电量子结构设计与测量教育部重点实验室北京100081

激光是现代光学的支柱之一,具有良好的方向性、单色性、相干性以及高亮度.基于这些特点,激光在很多应用领域发挥重要作用,如激光雷达、光纤通信、激光武器、激光切割、激光美容等.回音壁模式光学微腔是一种新型谐振腔,与传统的法布里-... 详细信息

激光是现代光学的支柱之一,具有良好的方向性、单色性、相干性以及高亮度.基于这些特点,激光在很多应用领域发挥重要作用,如激光雷达、光纤通信、激光武器、激光切割、激光美容等.回音壁模式光学微腔是一种新型谐振腔,与传统的法布里-珀罗谐振腔相比具有高品质因子、小型化的优势,可以实现光与物质的强相互作用,制作低阈值、窄线宽的微型激光器.由于回音壁模式光学微腔具有显著的腔外倏逝场,其表面的分子、颗粒可以显著地改变激光的波长、线宽、阈值、强度,是一个良好的用于生化检测的平台.本文介绍回音壁模式微腔激光器的基本性质、生化检测机理及其在单纳米颗粒检测、痕量生化成分检测、细胞标记、细胞内检测等方面的应用,并对其应用前景进行展望.

关键词：光学微腔微型激光器纳米颗粒检测痕量生化检测细胞标记

同方期刊数据库

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Neural Regeneration Research 2025年第2期20卷 366-377页

作者： Samuel Abokyi Dennis Yan-yin Tse School of Optometry The Hong Kong Polytechnic UniversityKowloonHong Kong Special Administrative RegionChina Research Center for SHARP Vision The Hong Kong Polytechnic UniversityKowloonHong Kong Special Administrative RegionChina Center for Eye and Vision Research Sha TinHong Kong Special Administrative RegionChina

Retinal aging has been recognized as a significant risk factor for various retinal disorders,including diabetic retinopathy,age-related macular degeneration,and glaucoma,following a growing understanding of the molecular underpinnings of their *** comprehensive review explores the mechanisms of retinal aging and investigates potential neuroprotective approaches,focusing on the activation of transcription factor *** meta-analyses have demonstrated promising outcomes of transcription factor EB-targeted strategies,such as exercise,calorie restriction,rapamycin,and metformin,in patients and animal models of these common retinal *** review critically assesses the role of transcription factor EB in retinal biology during aging,its neuroprotective effects,and its therapeutic potential for retinal *** impact of transcription factor EB on retinal aging is cell-specific,influencing metabolic reprogramming and energy homeostasis in retinal neurons through the regulation of mitochondrial quality control and nutrient-sensing *** vascular endothelial cells,transcription factor EB controls important processes,including endothelial cell proliferation,endothelial tube formation,and nitric oxide levels,thereby influencing the inner blood-retinal barrier,angiogenesis,and retinal ***,transcription factor EB affects vascular smooth muscle cells,inhibiting vascular calcification and *** retinal pigment epithelial cells,transcription factor EB modulates functions such as autophagy,lysosomal dynamics,and clearance of the aging pigment lipofuscin,thereby promoting photoreceptor survival and regulating vascular endothelial growth factor A expression involved in *** cell-specific functions of transcription factor EB significantly impact retinal aging mechanisms encompassing proteostasis,neuronal synapse plasticity,energy metabolism,microvasculature,and inflammation,ultimately offering pro

关键词： age-related macular degeneration anti-aging interventions autophagy calorie restriction diabetic retinopathy exercise glaucoma neuromodulation phagocytosis photoreceptor outer segment degradation retinal aging transcription factor EB

DKP-SLAM:A Visual SLAM for Dynamic Indoor Scenes Based on Object Detection and Region Probability

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Computers, Materials & Continua 2025年第1期82卷 1329-1347页

作者： Menglin yin Yong Qin Jiansheng Peng College of Automation Guangxi University of Science and TechnologyLiuzhou545000China Department of Artificial Intelligence and Manufacturing Hechi UniversityHechi546300China Key Laboratory of AI and Information Processing Education Department of Guangxi Zhuang Autonomous RegionHechi546300China Guangxi Key Laboratory of Sericulture Ecology and Applied Intelligent Technology School of Chemistry and BioengineeringHechi UniversityHechi546300China

In dynamic scenarios,visual simultaneous localization and mapping(SLAM)algorithms often incorrectly incorporate dynamic points during camera pose computation,leading to reduced accuracy and *** paper presents a dynamic SLAM algorithm that leverages object detection and regional dynamic ***,a parallel thread employs the YOLOX object detectionmodel to gather 2D semantic information and compensate for missed ***,an improved K-means++clustering algorithm clusters bounding box regions,adaptively determining the threshold for extracting dynamic object contours as dynamic points *** process divides the image into low dynamic,suspicious dynamic,and high dynamic *** the tracking thread,the dynamic point removal module assigns dynamic probability weights to the feature points in these *** with geometric methods,it detects and removes the dynamic *** final evaluation on the public TUM RGB-D dataset shows that the proposed dynamic SLAM algorithm surpasses most existing SLAM algorithms,providing better pose estimation accuracy and robustness in dynamic environments.

关键词： Visual SLAM dynamic scene YOLOX K-means++clustering dynamic probability