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IEEE International Conference on Granular Computing (GRC)

作者： Ben-Qiong Hu Jiang-Lin Zhou Xu Li Chao-Yang Pang College of Management Science Chengdu University of Technology Chengdu China Department of mathematics & physics He fei university Anhui China Group of Gene Computation College of Mathematics and Software Science Sichuan Normal University Chengdu China Group of Gene Computation Key Laboratory of Visual Computation and Virtual Reality of Sichuan Chengdu China

Alzheimer's disease (AD) is the most common form of dementia. One of the research topics is to identify the genes associated with AD through analyzing DNA microarray data by computation. Holding view of vertex coloring of graph theory, in this paper, a new clustering method named vertex coloring clustering (VCC) is presented. VCC is specified for gene clustering, which makes similar gene expression cluster tightly in same class and they share same gene characteristics or function. So, VCC can be also used to identify the genes associated with AD. Using VCC, 27 candidate AD genes are identified in this paper, and 5 genes agree with other men's study.

关键词： Alzheimer's disease Image color analysis Gene expression Clustering algorithms Proteins Educational institutions

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The Peridigm Meshfree Peridynamics Code

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Journal of Peridynamics and Nonlocal Modeling 2024年第1期6卷 118-148页

作者： Littlewood, David J. Parks, Michael L. Foster, John T. Mitchell, John A. Diehl, Patrick Center for Computing Research Sandia National Laboratories Albuquerque NM United States Hildebrand Department of Petroleum and Geosystems Engineering University of Texas at Austin Austin TX United States Center of Computation & Technology and Department of Physics and Astronomy Louisiana State University Baton Rouge LA United States Computer Science and Mathematics Division Oak Ridge National Laboratory Oak Ridge TN United States

Peridigm is a meshfree peridynamics code written in C++ for use on large-scale parallel computers. It was originally developed at Sandia National Laboratories and is currently managed as an open-source, community driven software project. Its primary features include bond-based, state-based, and non-ordinary state-based constitutive models, bond failure laws, contact, and support for explicit and implicit time integration. To date, Peridigm has been used primarily by methods developers focused on solid mechanics and material failure. Peridigm utilizes foundational software components from Sandia’s Trilinos project and was designed for extensibility. This paper provides an overview of the solution methods implemented in Peridigm, a discussion of its software infrastructure, and demonstrates the use of Peridigm for the solution of several example problems. © 2023, The Author(s).

关键词： Meshfree methods Open source software Peridynamics

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Spontaneous decay process of a two-level atom embedded in a one-dimensional structure containing left-handed material

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Physical Review A 2007年第6期76卷 063813-063813页

作者： Jing-ping Xu Ya-ping Yang Hong Chen Shi-Yao Zhu Department of Physics Tongji University Shanghai 200092 People’s Republic of China Department of Physics Hong Kong Baptist University Kowloon Tong Hong Kong Key Laboratory of Quantum Communication and Quantum Computation University of Science and Technology of China Hefei 230026 People’s Republic of China

The spontaneous decay process of a two-level atom embedded in a one-dimensional structure containing left-handed material (LHM) is investigated. We first consider the case of the atom being in front of a LHM layer mounted on a mirror, where it has been claimed that the atomic decay would be inhibited completely. Here we introduce dispersion and dissipation in the LHM, and find that there are two factors that weaken the inhibition of spontaneous decay. One is atomic nonradiative decay at shorter distances and the other is the instantaneous radiative decay process for larger distances. Then we discuss the decay process of an atom embedded in a one-dimensional photonic crystal composed of alternate LHM and ordinary material [right-handed material (RHM)] layers (LHM-RHM PC). Because of two special characteristics of the LHM, phase compensation and the fact that a frequency with negative index is usual near the material resonance frequency, both the radiative and nonradiative decay processes in the LHM-RHM PC are much different from those in a RHM PC. Under appropriate condition, the population evolution of atoms in a LHM-RHM PC displays oscillatory behavior.

关键词： Photonic crystals

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Optimized ultrabroadband absorbing multilayer thin film structure

Optimized ultrabroadband absorbing multilayer thin film stru...

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Frontiers in Optics, FIO 2018

作者： Matyas, Corey You, Chenglong Huang, Yin Dowling, Jonathan P. Veronis, Georgios Hearne Institute for Theoretical Physics Department of Physics and Astronomy Louisiana State University Baton RougeLA70803 United States Department of Optoelectrics Information Science and Engineering School of Physics and Electronics Central South University Changsha Hunan410012 China NYU-ECNU Institute of Physics NYU Shanghai 3663 Zhongshan Road North Shanghai200062 China CAS-Alibaba Quantum Computing Laboratory CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China Shanghai201315 China School of Electrical Engineering and Computer Science Louisiana State University Baton RougeLA70803 United States Center for Computation and Technology Louisiana State University Baton RougeLA70803 United States

We design an optimized aperiodic multilayer thin film structure with ultra-broadband absorption over a broad angular range. Using a hybrid optimization algorithm, we achieve an average 97.9% absorption from 400 nm to ... 详细信息

ISBN: (纸本)9781943580460

关键词： Film preparation

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Prediction of Vibrational Spectrum and Thermodynamic Properties for Phosphorus Mononitride

SSRN

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SSRN 2023年

作者： Tian, Hongrui Fan, Zhixiang Wang, Zhengrong Fan, Qunchao Ye, Zongbiao Gou, Fujun Wei, Jianjun School of Science Key Laboratory of High Performance Scientific Computation Xihua University Chengdu610039 China Key Laboratory of Radiation Physics and Technology Ministry of Education Institute of Nuclear Science and Technology Sichuan University Chengdu610064 China Institute of Atomic and Molecular Physics Sichuan University Chengdu610064 China

In this work, an accurate potential energy curve (PEC) for the ground electronic state of phosphorus mononitride (PN) molecule have been determined from a variationally improved Hulburt-Hirschfelder (VIHH) oscillator model in conjunction with the experimental spectral constants ([[EQUATION]]). We have numerically solved the Schrödinger equation for the VIHH potential using the LEVEL program, obtaining the pure vibrational spectrum that converges to the dissociation limit. In addition, the partition functions of PN molecule are calculated using the full rovibrational energies. Ultimately, thermodynamic properties like molar heat capacity, entropy, enthalpy, and Gibbs free energy were calculated for the PN molecule and show good agreement with those data from the NIST (National Institute of Standards and technology) database. © 2023, The Authors. All rights reserved.

关键词： Vibrational spectra

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Ideal Weyl semimetal with 3D spin-orbit coupled ultracold quantum gas

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science Bulletin 2020年第24期65卷 2080-2085,M0005页

作者： Yue-Hui Lu Bao-Zong Wang Xiong-Jun Liu International Center for Quantum Materials and School of Physics Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Shanghai Branch National Laboratory for Physical Sciences at Microscale and Department of Modem PhysicsUniversity of Science and Technology of ChinaShanghai 201315China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China

There is an immense effort in search for various types of Weyl semimetals, of which the most fundamental phase consists of the minimal number of i.e. two Weyl points, but is hard to engineer in solids. Here we demonstrate how such fundamental Weyl semimetal can be realized in a maneuverable optical Raman lattice, with which the three-dimensional(3D) spin-orbit(SO) coupling is synthesised for ultracold atoms. In addition, a new novel Weyl phase with coexisting Weyl nodal points and nodal ring is also predicted here, and is shown to be protected by nontrivial linking numbers. We further propose feasible techniques to precisely resolve 3D Weyl band topology through 2D equilibrium and dynamical measurements. This work leads to the first realization of the most fundamental Weyl semimetal band and the 3D SO coupling for ultracold quantum gases, which are respectively the significant issues in the condensed matter and ultracold atom physics.

关键词： Weyl semimetal Spin-orbit coupling Topological quantum phase Ultracold atoms Optical lattice Quench dynamics

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Single rare-earth ions as atomic-scale probes in ultrascaled transistors

arXiv

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arXiv 2018年

作者： Zhang, Qi Hu, Guangchong De Boo, Gabriele G. Rancic, Milos Johnson, Brett C. McCallum, Jeffrey C. Du, Jiangfeng Sellars, Matthew J. Yin, Chunming Rogge, Sven CAS Key Laboratory of Microscale Magnetic Resonance Department of Modern Physics University of Science and Technology of China Hefei230026 China Centre of Excellence for Quantum Computation and Communication Technology School of Physics University of New South Wales SydneyNSW2052 Australia Centre of Excellence for Quantum Computation and Communication Technology RSPE Australian National University CanberraACT0200 Australia Centre of Excellence for Quantum Computation and Communication Technology School of Physics University of Melbourne MelbourneVIC3010 Australia Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei230026 China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China Hefei230026 China

Continued dimensional scaling of semiconductor devices has driven information technology into vastly diverse applications. As the size of devices approaches fundamental limits, metrology techniques with nanometre resolution and threedimensional (3D) capabilities are desired for device optimisation. For example, the performance of an ultra-scaled transistor can be strongly influenced by the local electric field and strain. Here we study the spectral response of single erbium ions to applied electric field and strain in a silicon ultra-scaled transistor. Stark shifts induced by both the overall electric field and the local charge environment are observed. Further, changes in strain smaller than 3×10-6are detected, which is around two orders of magnitude more sensitive than the standard techniques used in the semiconductor industry. These results open new possibilities for non-destructive 3D mapping of the local strain and electric field in the channel of ultra-scaled transistors, using the single erbium ions as ultra-sensitive atomic probes. Copyright © 2018, The Authors. All rights reserved.

关键词： Electric fields

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Photoionization detection of a single Er3+ ion with sub-100-ns time resolution

arXiv

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arXiv 2022年

作者： Zhang, Yangbo Fan, Wenda Yang, Jiliang Guan, Hao Zhang, Qi Qin, Xi Duan, Changkui de Boo, Gabriele G. Johnson, Brett C. McCallum, Jeffrey C. Sellars, Matthew J. Rogge, Sven Yin, Chunming Du, Jiangfeng CAS Key Laboratory of Microscale Magnetic Resonance School of Physical Sciences University of Science and Technology of China Hefei230026 China Hefei National Laboratory University of Science and Technology of China Hefei230088 China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China Hefei230026 China Centre of Excellence for Quantum Computation and Communication Technology School of Physics University of New South Wales NSW2052 Australia Centre of Excellence for Quantum Computation and Communication Technology School of Engineering RMIT University VIC3001 Australia Centre of Excellence for Quantum Computation and Communication Technology School of Physics University of Melbourne VIC3010 Australia Centre of Excellence for Quantum Computation and Communication Technology Research School of Physics and Engineering Australian National University ACT0200 Australia

Efficient detection of single optical centers in solids is essential for quantum information processing, sensing, and single-photon generation applications. In this work, we use radio-frequency (RF) reflectometry to electrically detect the photoionization induced by a single Er3+ ion in Si. The high bandwidth and sensitivity of the RF reflectometry provide sub-100-ns time resolution for the photoionization detection. With this technique, the optically excited state lifetime of a single Er3+ ion in a Si nano-transistor is measured for the first time to be 0.49 ± 0.04 µs. Our results demonstrate an efficient approach for detecting a charge state change induced by Er excitation and relaxation. This approach could be used for fast readout of other single optical centers in solids and is attractive for large-scale integrated optical quantum systems thanks to the multi-channel RF reflectometry demonstrated with frequency multiplexing techniques. Copyright © 2022, The Authors. All rights reserved.

关键词： Ions

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Spectrum of molecular hexaquarks

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Physical Review D 2024年第1期110卷 014038-014038页

作者： Bo Wang Kan Chen Lu Meng Shi-Lin Zhu College of Physics Science and Technology Hebei Key Laboratory of High-precision Computation and Application of Quantum Field Theory Baoding 071002 China Hebei Research Center of the Basic Discipline for Computational Physics Baoding 071002 China School of Physics Institut für Theoretische Physik II School of Physics and Center of High Energy Physics

We investigate the mass spectra of molecular-type hexaquark states in the dibaryon systems. These systems are composed of the charmed baryons [Σc(*),Ξc(′,*)], doubly charmed baryons [Ξcc(*)], and hyperons [Σ(*),Ξ(*)]. We consider all possible combinations of particle-particle and particle-antiparticle pairs, including the S-wave spin multiplets in each combination. We establish the underlying connections among the molecular tetraquarks, pentaquarks, and hexaquarks with the effective quark-level interactions. We find that the existence of molecular states in DD*, DD¯*, and ΣcD¯(*) systems leads to the emergence of a large number of deuteronlike hexaquarks in the heavy flavor sectors. Currently, there have been several experimental candidates for molecular tetraquarks and pentaquarks. The experimental search for near-threshold hexaquarks will further advance the establishment of the underlying dynamical picture of hadronic molecules and deepen our understanding of the role of spin-flavor symmetry in near-threshold residual strong interactions.

关键词： Heavy quark effective theory Multiquark bound states Quark model

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Damaged solar cell detection based on gray-intensity wave transformation

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Procedia Engineering 2011年 15卷 3808-3813页

作者： Xuanjing Shen Wei Wei Jianwu Long Qingji Qian Colledge of Computer Science and Technology Jilin University Changchun 130012 China Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Changchun 130012China Colledge of Physics Jilin University Changchun 130025 China

An automatic system to detect cracks of solar cells on satellite solar panel through camera has been proposed in this study. And a novel binarization method based on gray intensity wave transformation is also introduced to decrease the impact of non-uniform illumination on cell image. It adaptively classifies the pixel depending on local peak and trough on the gray intensity surface. After the cell image binareized, a strategy called “adjacency searching” is adopted to remove the gate lines. Then the ellipse fitting based on least squares is conducted on the contours of crack segments to get their angles, which are used to connect these segments into the whole crack. The experiment on 5000 cells in one panel had shown that the precision of our system has reached 98.5%, and its false alarm rate is less than 9%, which could meet the application requirements.

关键词： Satellite Solar cell Binarization Crack detection

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