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arXiv 2023年

作者： Xu, S. Li, R. Zhai, Y. Xia, Y. Siercke, M. Ospelkaus, S. National Institute of Extremely-Weak Magnetic Field Infrastructure Hangzhou310052 China Key Laboratory of Ultra-Weak Magnetic Field Measurement Technology Ministry of Education School of Instrumentation and Optoelectronic Engineering Beihang University Beijing100191 China Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology Hangzhou Innovation Institute Beihang University Hangzhou310051 China Hefei National Laboratory Hefei230088 China State Key Laboratory of Precision Spectroscopy School of Physics and Electronic Science East China Normal University Shanghai200241 China Institut für Quantenoptik Leibniz Universität Hannover Hannover30167 Germany

Direct laser cooling and trapping of molecules to temperature below Doppler limit and density exceeding 108 are challenging due to the sub-Doppler heating effects of molecular magneto-optical trap (MOT). In our previous paper [1], we presented a general approach to engineering the sub-Doppler force by tuning the AC stark shift with the addition of a blue detuned laser. Here, by employing the Bayesian optimization method to optical Bloch equations, we have identified multiple blue-detuned MOT schemes for the CaF molecule. From the three-dimensional Monte-Carlo simulation, we obtained a MOT temperature and density of 14 µK and 4.5 × 108 cm−3, respectively. Our findings present a potential avenue for directly loading molecular MOTs into conservative traps, which can capitalize on the high density and low temperature of the MOT. Copyright © 2023, The Authors. All rights reserved.

关键词： Molecules

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Precursor Design in Self-Templating Strategy for Carbon Encapsulated Bimetallic Catalysts: Boosting Organic Pollutants Degradation Via Nonradical Pathways

SSRN

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SSRN 2022年

作者： Guo, Weixuan Zhuang, Sixiang Shen, Yi Li, Yungui Zhang, Suorong Fang, Qile Research and Development Center for Watershed Environmental Eco-Engineering Beijing Normal University Zhuhai519087 China Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province College of Environment Zhejiang University of Technology Hangzhou310032 China Sichuan Provincial Sci-Tech Cooperation Base of Low-cost Wastewater Treatment Technology Department of Environmental Engineering Southwest University of Science and Technology Mianyang621010 China Chongqing Feiyang Measurement and Control Technology Research Institute Co. Ltd. Chongqing402760 China

Designing high-performance heterostructure catalysts for peroxymonosulfate (PMS) activation is a promising research area. In this study, we employed a self-templating strategy using Prussian blue analogs (PBAs) precursors as source design to fabricate CoFe/C heterostructure catalysts. The slow-speed coordination renders the CoFe PBAs precursor with highly ordered crystal structure and less coordinated water, resulting in an idea carbon-encapsulated CoFe bimetallic catalyst (CoFe-S-T) with more high-valance metals and graphitized carbon layer in its heterostructure, which is proved of superior catalytic performance for tetracycline (TC) degradation through nonradical pathway in PMS-driven oxidation. The higher CoIII/CoII ratio and surface oxygen content make CoFe-S-T an excellent catalyst by boosting 1O2 generation, which is the predominant active species. Besides, CoFe-S-T has a high proportion of graphitized carbon layer, which significantly improves the direct electron transfer pathway. Thus, utilizing precursor design in self-templating strategy is an effective method to synthesize high-performance heterostructure for PMS-driven organic pollutant degradation. © 2022, The Authors. All rights reserved.

关键词： Catalysts

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Precursor Design in Self-Templating Strategy for Carbon Encapsulated Bimetallic Catalysts: Boosting Organic Pollutants Degradation Via Nonradical Pathways

SSRN

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SSRN 2022年

作者： Fang, Qile Dong, Pingping Zhuang, Sixiang Shen, Yi Li, Yungui Zhang, Suorong Guo, Weixuan Research and Development Center for Watershed Environmental Eco-Engineering Beijing Normal University Zhuhai Campus Zhuhai519087 China Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province College of Environment Zhejiang University of Technology Hangzhou310032 China Sichuan Provincial Sci-Tech Cooperation Base of Low-cost Wastewater Treatment Technology Department of Environmental Engineering Southwest University of Science and Technology Mianyang621010 China Chongqing Feiyang Measurement and Control Technology Research Institute Co. Ltd. Chongqing402760 China

关键词： Catalysts

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Dirac nodal lines in the quasi-one-dimensional ternary telluride TaPtTe5

arXiv

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arXiv 2022年

作者： Xiao, Shaozhu Jiao, Wen-He Lin, Yu Jiang, Qi Yang, Xiufu He, Yunpeng Jiang, Zhicheng Yang, Yichen Liu, Zhengtai Ye, Mao Shen, Dawei He, Shaolong Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China Key Laboratory of Quantum Precision Measurement of Zhejiang Province Department of Applied Physics Zhejiang University of Technology Hangzhou310023 China Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering Fuzhou350117 China College of Physics and Energy Fujian Normal University Fuzhou350117 China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Science Shanghai200050 China University of Chinese Academy of Sciences Beijing100049 China

A Dirac nodal-line phase, as a quantum state of topological materials, usually occur in three-dimensional or at least two-dimensional materials with sufficient symmetry operations that could protect the Dirac band crossings. Here, we report a combined theoretical and experimental study on the electronic structure of the quasi-one-dimensional ternary telluride TaPtTe5, which is corroborated as being in a robust nodal-line phase with fourfold degeneracy. Our angle-resolved photoemission spectroscopy measurements show that two pairs of linearly dispersive Dirac-like bands exist in a very large energy window, which extend from a binding energy of ∼ 0.75 eV to across the Fermi level. The crossing points are at the boundary of Brillouin zone and form Dirac-like nodal lines. Using first-principles calculations, we demonstrate the existing of nodal surfaces on the ky = ±π plane in the absence of spin-orbit coupling (SOC), which are protected by nonsymmorphic symmetry in TaPtTe5. When SOC is included, the nodal surfaces are broken into several nodal lines. By theoretical analysis, we conclude that the nodal lines along Y -T and the ones connecting the R points are non-trivial and protected by nonsymmorphic symmetry against SOC. Copyright © 2022, The Authors. All rights reserved.

关键词： Calculations

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Non-Gaussian nature and entanglement of spontaneous parametric nondegenerate triple-photon generation

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Physical Review A 2021年第1期103卷 013704-013704页

作者： Da Zhang Yin Cai Zhan Zheng David Barral Yanpeng Zhang Min Xiao Kamel Bencheikh Key Laboratory for Physical Electronics and Devices of the Ministry of Education and Shaanxi Key Lab of Information Photonic Technique School of Electronic and Information Engineering Xi'an Jiaotong University Xi'an 710049 China Centre de Nanosciences et de Nanotechnologies CNRS/Université Paris-Saclay 91120 Palaiseau France Zhejiang Provincial Key Laboratory of Quantum Precision Measurement College of Science Zhejiang University of Technology Hangzhou 310023 China Department of Physics University of Arkansas Fayetteville Arkansas 72701 USA National Laboratory of Solid State Microstructures and School of Physics Nanjing University Nanjing 210093 China

We theoretically demonstrate through numerical methods that the triple-photon state generated by three-photon spontaneous parametric down-conversion is a non-Gaussian Greenberger-Horne-Zeilinger state, showing super-Gaussian statistics. Interestingly, the degree of entanglement between the modes of the triple-photon state is stronger than that corresponding to the two-mode squeezed vacuum state produced by a quadratic Hamiltonian with the same parameters. Furthermore, we propose a model to prepare two-mode sub-Gaussian entangled states with a tunable negative Wigner function based on quadrature projection measurements. We find that these Gaussian projection measurements with outcomes X≥1 not only improve the entanglement of the residual two modes but also introduce a Gaussian component, resulting in the coexistence of Gaussian and non-Gaussian entanglement.

关键词： Entanglement production Photon pairs & parametric down-conversion Quantum computation Quantum optics

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Adaptive Decoupling Control of Three-Axis Active Magnetic Compensation System Based on MSG Identification

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IEEE Transactions on Instrumentation and measurement 2025年 74卷

作者： Tian, Ge Cui, Peiling Li, Haitao Zhang, Haifeng Beihang University Key Laboratory of Ultra-Weak Magnetic Field Measurement Technology Ministry of Education School of Instrumentation and Optoelectronic Engineering Beijing100191 China Hangzhou Innovation Institute Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology State Key Laboratory of Traditional Chinese Medicine Syndrome National Institute of Extremely-weak Magnetic Field Infrastructure Hangzhou310051 China

Magnetic shielding room (MSR) and three-axis magnetic field compensation system (TMFC) are necessary for extremely weak magnetic field measurement. The TMFC system can effectively reduce the impact of magnetic field interference on the extremely weak magnetic field measurement in the MSR, but the coupling effect between different compensation axes reduces the compensation performance. This paper proposes an adaptive decoupling control method based on online modified stochastic gradient (MSG) identification. The decoupler is designed to transform the TMFC system into three single-input single-output (SISO) systems based on the interaction model structure established by frequency domain identification and the parameters identified online using MSG algorithm. Additionally, a feedback controller was designed to ensure that the SISO systems has the satisfied dynamic performance and stability. Experimental results indicate that the proposed method realizes dynamic decoupling of TMFC system. © 1963-2012 IEEE.

关键词： Parameter estimation

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Rapid and broad-spectrum detection of salmonella in various environments by magnetic enrichment-surface enhanced Raman spectroscopy

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Talanta 2025年 295卷 128368页

作者： Zheng, Li Sun, Fan Ye, Qingdan Wang, Mengmeng Liang, Pei Chen, Qiang Pang, Kun Wang, Yufeng College of Optical and Electronic Technology China Jiliang University Hangzhou310018 China Key Laboratory of Microbiological Metrology Measurement & Bio-product Quality Security State Administration for Market Regulation Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine College of Life Sciences China Jiliang University Hangzhou310018 China College of Metrology and Measurement Engineering China Jiliang University Hangzhou310018 China

Rapid, accurate, and broad-spectrum detection of pathogenic bacteria in food is very important and an emerging need for increasing food safety concerns. Here, we present an ultrasensitive Surface-enhanced Raman spectroscopy (SERS) based aptasensor, which consists of core-shell structure (Ag@Au) and magnetic composites (Fe3O4@Au@Ag). 4-mercaptobenzoic acid (4MBA) as Raman reporter was embedded in Ag@Au nanoparticles (Ag@4MBA@Au) based on an internal standard. The combination of Ag@4MBA@Au and Fe3O4@Au@Ag are used to form the aptasensor with strongest Raman signal. Upon exposure to salmonella, the interaction between the SERS nanotags and the magnetic substrate was disrupted, causing an inverse correlation between the Raman intensity of 4MBA and the salmonella concentration. The result shows a wide linear range from 10 to 108 cfu/mL with five subtypes salmonella (S. Typhimurium, S. Enteritidis, S. Kentucky, S. Indiana, S. NO) and a low limit of detection of 1.782, 1.637, 1.941, 1.632, 1.875 cfu/mL, respectively. When applied to the detection of salmonella in actual samples (lake water, milk, shrimp), no pretreatment is required, and the results show no significant difference compared to the standard. © 2025 Elsevier B.V.

关键词： Salmonella

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UPdec-Webb: A Dataset for Coaddition of JWST NIRCam Images

arXiv

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arXiv 2024年

作者： Wang, Lei Shan, Huanyuan Nie, Lin Cheng, Cheng Yuan, Fang-Ting Cui, Qifan Li, Guoliang Xie, Yushan Liu, Dezi Liu, Yao Fang, Min Li, Nan Jia, Peng Li, Ran Liu, Fengshan Shu, Yiping Jiang, Chang Wei, Cheng-Liang Qu, Han Zheng, Wen-Wen Zhu, Li-Yan Kang, Xi Purple Mountain Observatory Key Laboratory of Radio Astronomy Chinese Academy of Sciences 10 Yuanhua Road Qixia District Nanjing210023 China Shanghai Astronomical Observatory Chinese Academy of Sciences 80 Nandan Road Shanghai200030 China Key Laboratory of Radio Astronomy and Technology Chinese Academy of Sciences A20 Datun Road Chaoyang District Beijing100101 China University of Chinese Academy of Sciences Beijing100049 China Department of Information Engineering Wuhan Institute of City Hubei Wuhan430083 China Chinese Academy of Sciences South America Center for Astronomy National Astronomical Observatories CAS Beijing100101 China CAS Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Beijing100101 China Key Laboratory of Space and Technology National Astronomical Observatories Chinese Academy of Sciences Beijing100101 China South-Western Institute for Astronomy Research Yunnan University Yunnan Kunming650500 China National Astronomical Observatories Chinese Academy of Sciences Beijing100871 China College of Electronic Information and Optical Engineering Taiyuan030024 China Peng Cheng Lab Shenzhen518066 China Department of Physics Durham University DurhamDH1 3LE United Kingdom Zhejiang Provincial Key Laboratory of Quantum Precision Measurement College of Science Institute for Frontiers and Interdisciplinary Sciences Zhejiang University of Technology 288 Liuhe Road Hangzhou310023 China Zhejiang University Purple Mountain Observatory Joint Research Center for Astronomy Zhejiang University Hangzhou327 China

We present the application of the image coaddition algorithm, Up-sampling and PSF Deconvolution Coaddition (UPDC), for stacking multiple exposure images captured by the James Webb Space Telescope (JWST) Near-Infrared Camera (NIRCam). By addressing the point spread function (PSF) effect, UPDC provides visually enhanced and sharper images. Furthermore, the anti-aliasing and super-resolution capabilities of UPDC make it easier to deblend sources overlapped on images, yielding a higher accuracy of aperture photometry. We apply this algorithm to the SMACS J0723 imaging data. Comparative analysis with the Drizzle algorithm demonstrates significant improvements in detecting faint sources, achieving accurate photometry, and effectively deblending (super-resolution) closely packed sources. As a result, we have newly detected a pair of close binary stars that were previously unresolvable in the original exposures or the Drizzled image. These improvements significantly benefit various scientific projects conducted by JWST. The resulting dataset, named"UPdec-Webb", can be accessible through the official website of the Chinese Virtual Observatory (ChinaVO). © 2024, CC BY-NC-SA.

关键词： Space telescopes

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Super-exponential growth of out-of-time-ordered correlators

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Physical Review B 2021年第18期103卷 184311-184311页

作者： Wen-Lei Zhao Yue Hu Zhi Li Qian Wang School of Science Jiangxi University of Science and Technology Ganzhou 341000 China Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials GPETR Center for Quantum Precision Measurement Frontier Research Institute for Physics and SPTE South China Normal University Guangzhou 510006 China Department of Physics Zhejiang Normal University Jinhua 321004 China

Out-of-time-ordered correlators (OTOCs) are an effective tool in characterizing black hole chaos, many-body thermalization, and quantum dynamics instability. Previous research findings have shown that the OTOCs' exponential growth (EG) marks the limit for quantum systems. However, we report in this paper a periodically-modulated nonlinear Schrödinger system, in which we interestingly find a way of OTOCs' growth: super-EG. We show that the quantum OTOCs, which stems from the quantum chaotic dynamics, will increase in a super-exponential way. We also find that in the classical limit, the hyper-chaos revealed by a linearly-increasing Lyapunov exponent actually triggers the super-EG of classical OTOCs. The results in this paper break the restraints of EG as the limit for quantum systems, which give us insight into the nature of quantum chaos in various fields of physics from black hole to many-body system.

关键词： Kerr effect Nonequilibrium statistical mechanics Quantum chaos

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Pilot study for risk stratification of papillary thyroid cancer by TumorFisher? circulating tumor cells technique

Pilot study for risk stratification of papillary thyroid can...

引用

2021年中国肿瘤标志物学术大会暨第十五届肿瘤标志物青年科学家论坛

作者： Xuejie Li Xuanxuan Chai Zhiyuan Hu Minghua Ge Liehao Jiang Jiafeng Wang Linyang Fan Ying Zhou Key Laboratory of Brain Aging and Neurodegenerative Diseases of Fujian Provincial Universities and Colleges School of Basic Medical Sciences Fujian Medical University CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and Technology of China Department of head and neck surgery Center of Otolaryngology-head and neck surgeryZhejiang Provincial People's HospitalPeople's Hospital of Hangzhou Medical College

Background: In recent years, thyroid cancer has become the fastest-growing malignant tumor at home and abroad, in which papillary thyroid cancer（PTC） accounts for more than 90%. There are many patients who depend on different pathological treatment guidelines, but there are still many risks for patients with thyroid cancer. The purpose of this study is to achieve accurate risk stratification for papillary thyroid cancer patients before treatment, so as to avoid over treatment and insufficient ***: We used the TumorFisher technology to isolate and analyze CTCs in 2.0 ml of blood samples from 83 patients with PTC before surgery. To compare and analyze the correlation between the number of CTCs and the risk assessment of PTC. The sensitivity and specificity of different CTCs numbers as cut-off values were compared and analyzed to distinguish high-risk and non-high-risk patients. The correlation between the number of CTCs and lymph node metastasis was compared and ***: The detection rate of CTCs was 73.91%（17/23） in high-risk patients, 20%（4/20） in middle-risk patients and 17.5%（7/40） in low-risk patients. The CTCs number cut-off value=2 significantly distinguished between high-risk and non-high-risk patients with sensitivity=60.9% and specificity=93.3%（AUC=0.82）. Setting the cut-off value of CTCs=2, the accuracy can reach 84.3% in predicting high-risk PTC,which means patients have more than 5 lymph nodes metastasis according to clinical judgment ***: Utilization TumorFisher technology to detect the CTCs in the blood of patients with PTC,which can be used for noninvasive early risk stratification. If a large number of clinical studies are carried out in the future, it may provide a basis for the treatment guidelines of thyroid cancer.

关键词： Circualting tumor cells Papillary thyroid cancer Liquid biopsy Companion diagnosis

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