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arXiv 2022年

作者： Ye, Chen Xie, Xiangnan Lv, Wenxing Huang, Ke Yang, Allen Jian Jiang, Sicong Liu, Xue Zhu, Dapeng Qiu, Xuepeng Tong, Mingyu Zhou, Tong Hsu, Chuang-Han Chang, Guoqing Lin, Hsin Li, Peisen Yang, Kesong Wang, Zhenyu Jiang, Tian Wang, Xiao Renshaw Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link 637371 Singapore State Key Laboratory of High Performance Computing College of Computer Science and Technology National University of Defense Technology Changsha410073 China Physics Laboratory Industrial Training Center Shenzhen Polytechnic Guangdong Shenzhen518055 China Department of NanoEngineering Program of Chemical Engineering University of California La Jolla San DiegoCA92093-0448 United States Program of Materials Science and Engineering University of California La Jolla San DiegoCA92093-0418 United States Institutes of Physical Science and Information Technology Anhui University Hefei230601 China Fert Beijing Institute MIIT Key Laboratory of Spintronics School of Integrated Circuit Science and Engineering Beihang University Beijing100191 China Beihang-Goertek Joint Microelectronics Institute Qingdao Research Institute Beihang University Qingdao266000 China Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology School of Physics Science and Engineering Tongji University Shanghai200092 China College of Advanced Interdisciplinary Studies National University of Defense Technology Changsha410073 China Insitute of Physics Academia Sinica Taipei115229 Taiwan College of Intelligence Science and Technology National University of Defense Technology Changsha410073 China National Innovation Institute of Defense Technology Academy of Military Sciences PLA China Beijing100010 China Beijing Academy of Quantum Information Sciences Beijing100084 China Beijing Institute for Advanced Study National University of Defense Technology Changsha410073 China School of Electrical and Electronic Engineering Nanyang Technological University 50 Nanyang Ave 639798 Singapore

MnBi2Te4 (MBT) is the first intrinsic magnetic topological insulator with the interaction of spin-momentum locked surface electrons and intrinsic magnetism, and it exhibits novel magnetic and topological phenomena. Recent studies suggested that the interaction of electrons and magnetism can be affected by the Mn-doped Bi2Te3 phase at the surface due to inevitable structural defects. Here we report an observation of nonreciprocal transport, i.e. current-direction-dependent resistance, in a bilayer composed of antiferromagnetic MBT and nonmagnetic Pt. The emergence of the nonreciprocal response below the Néel temperature confirms a correlation between nonreciprocity and intrinsic magnetism in the surface state of MBT. The angular dependence of the nonreciprocal transport indicates that nonreciprocal response originates from the asymmetry scattering of electrons at the surface of MBT mediated by magnon. Our work provides an insight into nonreciprocity arising from the correlation between magnetism and Dirac surface electrons in intrinsic magnetic topological insulators. © 2022, CC BY.

关键词： Magnetism

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Spin-orbit Interactions for Singlet-Triplet Qubits in Silicon

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Physical Review Letters 2019年第21期122卷 217702-217702页

作者： Patrick Harvey-Collard N. Tobias Jacobson Chloé Bureau-Oxton Ryan M. Jock Vanita Srinivasa Andrew M. Mounce Daniel R. Ward John M. Anderson Ronald P. Manginell Joel R. Wendt Tammy Pluym Michael P. Lilly Dwight R. Luhman Michel Pioro-Ladrière Malcolm S. Carroll Département de physique et Institut quantique Université de Sherbrooke Sherbrooke (Québec) J1K 2R1 Canada Sandia National Laboratories Albuquerque New Mexico 87185 USA Center for Computing Research Sandia National Laboratories Albuquerque New Mexico 87185 USA Center for Integrated Nanotechnologies Sandia National Laboratories Albuquerque New Mexico 87185 USA Quantum Information Science Program Canadian Institute for Advanced Research Toronto (Ontario) M5G 1Z8 Canada

Spin-orbit coupling is relatively weak for electrons in bulk silicon, but enhanced interactions are reported in nanostructures such as the quantum dots used for spin qubits. These interactions have been attributed to various dissimilar interface effects, including disorder or broken crystal symmetries. In this Letter, we use a double-quantum-dot qubit to probe these interactions by comparing the spins of separated singlet-triplet electron pairs. We observe both intravalley and intervalley mechanisms, each dominant for [110] and [100] magnetic field orientations, respectively, that are consistent with a broken crystal symmetry model. We also observe a third spin-flip mechanism caused by tunneling between the quantum dots. This improved understanding is important for qubit uniformity, spin control and decoherence, and two-qubit gates.

关键词： Coulomb blockade Quantum control Quantum gates Quantum information with solid state qubits Spin blockade Spin-orbit coupling Double quantum dots Elemental semiconductors MOSFET Nanostructures Bloch wave theory Dilution refrigerator Electrical techniques

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Spin-orbit interactions for singlet-triplet qubits in silicon

arXiv

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arXiv 2018年

作者： Harvey-Collard, Patrick Jacobson, N. Tobias Bureau-Oxton, Chloé Jock, Ryan M. Srinivasa, Vanita Mounce, Andrew M. Ward, Daniel R. Anderson, John M. Manginell, Ronald P. Wendt, Joel R. Pluym, Tammy Lilly, Michael P. Luhman, Dwight R. Pioro-Ladrière, Michel Carroll, Malcolm S. Département de physique et Institut quantique Université de Sherbrooke SherbrookeQCJ1K 2R1 Canada Sandia National Laboratories AlbuquerqueNM87185 United States Center for Computing Research Sandia National Laboratories AlbuquerqueNM87185 United States Center for Integrated Nanotechnologies Sandia National Laboratories AlbuquerqueNM87185 United States Quantum Information Science Program Canadian Institute for Advanced Research TorontoONM5G 1Z8 Canada

关键词： Semiconductor quantum dots

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High-Fidelity Single-Shot Readout for a Spin Qubit via an Enhanced Latching Mechanism

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Physical Review X 2018年第2期8卷 021046-021046页

作者： Patrick Harvey-Collard Benjamin D’Anjou Martin Rudolph N. Tobias Jacobson Jason Dominguez Gregory A. Ten Eyck Joel R. Wendt Tammy Pluym Michael P. Lilly William A. Coish Michel Pioro-Ladrière Malcolm S. Carroll Département de physique et Institut quantique Université de Sherbrooke Sherbrooke (Québec) J1K 2R1 Canada Sandia National Laboratories Albuquerque New Mexico 87185 USA Department of Physics McGill University Montréal (Québec) H3A 2T8 Canada Center for Computing Research Sandia National Laboratories Albuquerque New Mexico 87185 USA Center for Integrated Nanotechnologies Sandia National Laboratories Albuquerque New Mexico 87185 USA Quantum Information Science Program Canadian Institute for Advanced Research Toronto (Ontario) M5G 1Z8 Canada Center for Quantum Devices Niels Bohr Institute University of Copenhagen 2100 Copenhagen Denmark

The readout of semiconductor spin qubits based on spin blockade is fast but suffers from a small charge signal. Previous work suggested large benefits from additional charge mapping processes; however, uncertainties remain about the underlying mechanisms and achievable fidelity. In this work, we study the single-shot fidelity and limiting mechanisms for two variations of an enhanced latching readout. We achieve average single-shot readout fidelities greater than 99.3% and 99.86% for the conventional and enhanced readout, respectively, the latter being the highest to date for spin blockade. The signal amplitude is enhanced to a full one-electron signal while preserving the readout speed. Furthermore, layout constraints are relaxed because the charge sensor signal is no longer dependent on being aligned with the conventional (2,0)–(1,1) charge dipole. Silicon donor-quantum-dot qubits are used for this study, for which the dipole insensitivity substantially relaxes donor placement requirements. One of the readout variations also benefits from a parametric lifetime enhancement by replacing the spin-relaxation process with a charge-metastable one. This provides opportunities to further increase the fidelity. The relaxation mechanisms in the different regimes are investigated. This work demonstrates a readout that is fast, has a one-electron signal, and results in higher fidelity. It further predicts that going beyond 99.9% fidelity in a few microseconds of measurement time is within reach.

关键词： Coulomb blockade Quantum computation Quantum information with solid state qubits Semiconductors Spin relaxation Double quantum dots Elemental semiconductors Dilution refrigerator

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High-fidelity single-shot readout for a spin qubit via an enhanced latching mechanism

arXiv

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arXiv 2017年

作者： Harvey-Collard, Patrick D'Anjou, Benjamin Rudolph, Martin Jacobson, N. Tobias Dominguez, Jason Eyck, Gregory A. Ten Wendt, Joel R. Pluym, Tammy Lilly, Michael P. Coish, William A. Pioro-Ladri-re, Michel Carroll, Malcolm S. D-partement de Physique Institut Quantique Universit- de Sherbrooke SherbrookeQCJ1K2R1 Canada Sandia National Laboratories AlbuquerqueNM87185 United States Department of Physics McGill University Montr-alQCH3A2T8 Canada Center for Computing Research Sandia National Laboratories AlbuquerqueNM87185 United States Center for Integrated Nanotechnologies Sandia National Laboratories AlbuquerqueNM87185 United States Quantum Information Science Program Canadian Institute for Advanced Research TorontoONM5G1Z8 Canada Center for Quantum Devices Niels Bohr Institute University of Copenhagen Copenhagen2100 Denmark

The readout of semiconductor spin qubits based on spin blockade is fast but suffers from a small charge signal. Previous work suggested large benefits from additional charge mapping processes, however uncertainties remain about the underlying mechanisms and achievable fidelity. In this work, we study the single-shot fidelity and limiting mechanisms for two variations of an enhanced latching readout. We achieve average single-shot readout fidelities > 99:3% and > 99:86% for the conventional and enhanced readout respectively, the latter being the highest to date for spin blockade. The signal amplitude is enhanced to a full one-electron signal while preserving the readout speed. Furthermore, layout constraints are relaxed because the charge sensor signal is no longer dependent on being aligned with the conventional (2;0)..(1;1) charge dipole. Silicon donor-quantum-dot qubits are used for this study, for which the dipole insensitivity substantially relaxes donor placement requirements. One of the readout variations also benefits from a parametric lifetime enhancement by replacing the spin-relaxation process with a charge-metastable one. This provides opportunities to further increase the fidelity. The relaxation mechanisms in the different regimes are investigated. This work demonstrates a readout that is fast, has one-electron signal and results in higher fidelity. It further predicts that going beyond 99:9% fidelity in a few microseconds of measurement time is within reach. Copyright © 2017, The Authors. All rights reserved.

关键词： Qubits

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Focal Structure Analysis in Large Biological Networks

Focal Structure Analysis in Large Biological Networks

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2014 3rd International Conference on Environment Energy and Biotechnology

作者： Fatih ?en Rolf T.Wig Nitin Agarwal Mutlu Mete Rafal Kasprzyk Integrated Computing Program EITand University of Arkansas at Little Rock Department of Information Science and Business Information Systems University of Arkansas at Little Rock Department of Information Science University of Arkansas at Little Rock Department of Computer Science & Information Systems Texas A&M University-Commerce

After the completion of the Human Genome Project,identifying relevant protein structures became an important factor for detecting new disease-related *** newly available large-scale networks of molecular structures within the cell have made it possible to study protein function(s)in the context of a *** Protein-Protein Interaction(PPI)networks have been studied through the identification of clusters or communities by ***,however,interact in smaller and more pertinent groups.A new methodology,called Focal Structures Analysis(FSA),is presented to identify focal structures,i.e.,smaller and more relevant *** research advances our understanding of the role and impact of the focal structures and can help researchers with discovering protein related diseases.

关键词： PPI networks,focal structures,FSA,Louvain method

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Proceedings of the Frontiers of Retrovirology Conference 2016

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Retrovirology 2016年第1期13卷 1-40页

作者： Irena Zurnic Sylvia Hütter Nicole Stanke Tobias Kern Fabian Lindel Gesche Gerresheim Martin Hamann Erik Müllers Dirk Lindemann Ute Lehmann Juliane Reh Paul Lesbats Peter Cherepanov Melanie Mann Erik Serrao Alan Engelman Claire Da Silva Santos Kevin Tartour Andrea Cimarelli Rya Burdick Jianbo Chen Jaya Sastri Wei-Shau Hu Vinay Pathak Oliver T. Keppler Patrícia de Sousa-Pereira Hanna-Mari Baldauf Marcel Stern Karine Pradeau Sylvia Eiler Nicolas Levy Marc Ruff Sarah Lennon Sarah Cianferani Stéphane Emiliani Vincent Parissi Sylvie Rato Miguel Munoz Angela Ciuffi Antonio Rausell Amalio Telenti Alexander Zhyvoloup Ian Anderson Chen- Hsuin Lee Ariberto Fassati Anat Melamed Delphine Planas Petronela Ancuta Yuwei Zhang Huicheng Chen Annie Bernier Annie Gosselin Janos Kriston-Vizi Robin Ketteler Andy Merritt Charles Bangham Jocelyn Turpin Anthony Rodari Benoit Van Driessche Mathilde Galais Nadége Delacourt Sylvain Fauquenoy Caroline Vanhulle Anna Kula Carine Van Lint Ernst J. Wolvetang Arsène Burny Olivier Rohr Thijs van Montfort Renee van der Sluis Ben Berkhout Dave Speijer Gang Wang Na Zhao Atze T. Das Mirte Scherpenisse Bo Meng Andrzej Rutkowski Lars Dölken Andrew Lever Neil Berry Claire Ham Neil Almond Hoi Ping Mok Nicholas Norton Axel Fun Jack Hirst Mark Wills Chris Hellmund Harriet Groom Thomas Schuster Benedikt Asbach Ralf Wagner Christine Gross Martina Kalmer Andrea K. Thoma-Kress Norbert Donhauser Sebastian Millen Sandra M. Müller-Schmucker Veit Wiesmann Thomas Wittenberg Jan Gettemans Minghua Li Shan-Lu Liu Eric O. Freed Janis Müller Jan Münch Simone Joas Clement Wesley Gnanadurai Edina Lump Christina M. Stürzel Daniel Sauter Frank Kirchhoff Katharina Mack Kathrin Starz Christina Stürzel Xaver Sewald Nasim Motamedi Pradeep Uchil Ruoxi Pi Christin Herrmann Walther Mothes Mark Ladinsky Pamela Bjorkman Jagadish Beloor Priti Kumar Thomas Murooka Thorsten Mempel Michael Brehm Dale Greiner Erica Parrish Nicholas F. Parrish Beatrice H. Hahn Frederic Bibollet-Ruche Ulrike Sauermann Katharina Töpfer Tina Schultheiss Chris Molecular Virology and Gene Therapy Molecular Medicine Leuven Belgium Molecular Virology Technical University Dresden Dresden Germany Center for Regenerative Therapies Dresden Dresden Germany Potsdam University Potsdam Germany The Francis Crick Institute London Great Britain Institute of Clinical and Molecular Virology Friedrich-Alexander-Universität Erlangen-Nuremberg Erlangen Germany Dana Farber Cancer Institute Boston MA United States CIRI Lyon France National Cancer Institute Frederick MD United States Virology Max von Pettenkofer-Institut LMU Munich Munich Germany Institute of Medical Virology University of Frankfurt Frankfurt a. M. Germany German Center for Infection Research Munich Germany Institute of Medical Virology University Hospital Frankfurt Frankfurt a. M. Germany CIBIO/InBIO University of Porto Vairão Portugal Faculty of Sciences University of Porto Porto Portugal Virology Max von Pettenkofer Institute LMU Munich Germany Institute for Medical Virology Frankfurt a. M. Germany Integrative structural Biology IGBMC Illkirch France Institut Pluridisciplinaire Hubert Curien Strasbourg France Institut Cochin Paris France CNRS UMR5234 MFP Lab Bordeaux France Associated International Laboratory (LIA) Microbiology and Immunology CNRS/Université de Bordeaux/Heinrich Pette Institute-Leibniz Institute for Experimental Virology Bordeaux/Hamburg France Institute of Microbiology University Hospital Center and University of Lausanne Lausanne Switzerland Imagine Institute Paris Descartes University Paris France J. Craig Venter Institute La Jolla CA United States Infection University College London London Great Britain Medicine Imperial College London Great Britain Microbiology & Infection University of Montreal Montreal Great Britain CRCHUM Montreal Canada University College London LMCB London Great Britain MRC Technology Centre for Therapeutic Discovery London Great Britain Section of Virology Department of Medicine Imperial Co

Oral presentationsSession 1: Entry & uncoatingO1 Host cell polo-like kinases (PLKs) promote early prototype foamy virus (PFV) replicationIrena Zurnic, Sylvia Hütter, Ute Lehmann, Nicole Stanke, Juliane Re... 详细信息

Oral presentations

Session 1: Entry & uncoating

O1 Host cell polo-like kinases (PLKs) promote early prototype foamy virus (PFV) replication

Irena Zurnic, Sylvia Hütter, Ute Lehmann, Nicole Stanke, Juliane Reh, Tobias Kern, Fabian Lindel, Gesche Gerresheim, Martin Hamann, Erik Müllers, Paul Lesbats, Peter Cherepanov, Erik Serrao, Alan Engelman, Dirk Lindemann

O2 A novel entry/uncoating assay reveals the presence of at least two species of viral capsids during synchronized HIV-1 infection

Claire Da Silva Santos, Kevin Tartour, Andrea Cimarelli

O3 Dynamics of nuclear envelope association and nuclear import of HIV-1 complexes

Rya Burdick, Jianbo Chen, Jaya Sastri, Wei-Shau Hu, Vinay Pathak

O4 Human papillomavirus protein E4 potently enhances the susceptibility to HIV infection

Oliver T. Keppler

Session 2: Reverse transcription & integration

O5 Structure and function of HIV-1 integrase post translational modifications

Karine Pradeau, Sylvia Eiler, Nicolas Levy, Sarah Lennon, Sarah Cianferani, Stéphane Emiliani, Marc Ruff

O6 Regulation of retroviral integration by RNA polymerase II associated factors and chromatin structure

Vincent Parissi

Session 3: Transcription and latency

O7 A novel single-cell analysis pipeline to identify specific biomarkers of HIV permissiveness

Sylvie Rato, Antonio Rausell, Miguel Munoz, Amalio Telenti, Angela Ciuffi

O8 A capsid-dependent integration program linking T cell activation to HIV-1 gene expression

Alexander Zhyvoloup, Anat Melamed, Ian Anderson, Delphine Planas, Janos Kriston-Vizi, Robin Ketteler, Chen-Hsuin Lee, Andy Merritt, Petronela Ancuta, Charles Bangham, Ariberto Fassati

O9 Characterisation of new RNA polymerase III and RNA polymerase II transcriptional promoters in the Bovine Leukemia Virus genome

Anthony Rodari, Benoit Van Driessche, Mathilde Galais, Nadége Delacourt, Sylv

关键词： Human Immunodeficiency Virus Infection Simian Immunodeficiency Virus Feline Immunodeficiency Virus Bovine Leukemia Virus Prototype Foamy Virus

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From laptops to supercomputers: a single highly scalable code base for spiking neuronal network simulations

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BMC Neuroscience 2013年第1期14卷 1-2页

作者： Susanne Kunkel Abigail Morrison Markus Diesmann Maximilian Schmidt Jochen M Eppler Moritz Helias Hans E Plesser Jun Igarashi Tomoki Fukai Gen Masumoto Shin Ishii Simulation Laboratory Neuroscience - Bernstein Facility Simulation and Database Technology Institute for Advanced Simulation Jülich Aachen Research Alliance Jülich Research Centre Germany Institute of Neuroscience and Medicine (INM-6) and Institute for Advanced Simulation (IAS-6) Jülich Research Centre and JARA Germany Bernstein Center Freiburg Albert-Ludwig University of Freiburg Germany Institute of Cognitive Neuroscience Faculty of Psychology Ruhr-University Bochum Germany Medical Faculty RWTH University Aachen Germany Laboratory for Neural Circuit Theory RIKEN Brain Science Institute Wako Japan Department of Mathematical Sciences and Technology Norwegian University of Life Sciences Aas Norway High-Performance Computing Team RIKEN Computational Science Research Program Kobe Japan Integrated Systems Biology Laboratory Department of Systems Science Graduate School of Informatics Kyoto University Japan

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Construction of integrated Mechanical Simulation Model of Whole Body for Alive Human 10th

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World Congress on Medical Physics and Biomedical Engineering

作者： Yokota, Hideo Nishimura, Masaomi Fukasaku, Kazuaki Noda, Shigeho Shimai, Hiroyuki Nakmura, Sakiko Himeno, Ryutarou Makinouchi, Akitake RIKEN Computat Biomech Unit 2-1 Hirosawa Wako Saitama Japan RIKEN Integrated V-CAD Syst Res Program 2-1 Hirosawa Wako Saitama Japan Himonya Hosp Tokyo Japan RIKEN Adv Ctr Computing & Commun Wako Saitama Japan Grad sch Elect Commun Tokyo Japan

ISBN: (纸本)9783540368397

We are aiming at the mechanical simulation intended for the human body. The targeted mechanical simulation is structural mechanics (bone and soft tissue), fluid dynamics (blood flow), and kinetic (movement of the body). It constructs the simulation model of the whole body that can unitedly do these analyses. Moreover, it includes shape and the mechanical property in this model for the human body to be alive. We took a picture of X-ray CT and MRI for the volunteer. It created the data of 1mm voxel based on information of which it took a picture by X-ray CT. It can identify the soft tissue from the data of MRI. However, it has the spatial resolution and the problem of the distortion of the space, and it cannot construct the model as it is. We matched information on Xray CT and MRI, and constructed the whole body model. In addition, it can request the Young's modulus of the bone in the measurement of the mechanical property value according to the X-ray transmission rate. We developed the automated system by which it requested the shape of the whole body and the Young's modulus of the bone from transmission factor of X-ray CT. We had developed system was able to create VCAD data of the whole body of the human body. VCAD system is an integrated system of CAD,CAM,CAE. In this human body model we can manufacture the structure analysis, the flow analysis, and the implant constructed.

关键词： Human model Mechanical Simulation VCAD Patient Individual model Automated system

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Three-dimensional visualization and morphometry of small airways from microfocal X-ray computed tomography

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JOURNAL OF BIOMECHANICS 2003年第11期36卷 1587-1594页

作者： Sera, T Fujioka, H Yokota, H Makinouchi, A Himeno, R Schroter, RC Tanishita, K Keio Univ Ctr Life Sci & Toxicol Sch Fundamental Sci & Technol Kohoku Ku Yokohama Kanagawa 2238522 Japan Univ Michigan Dept Biomed Engn Ann Arbor MI 48109 USA RIKEN Inst Phys & Chem Res Adv Computing Ctr Wako Saitama 3510198 Japan RIKEN Inst Phys & Chem Res Integrated V CAD Syst Res Program Wako Saitama 3510198 Japan RIKEN Inst Phys & Chem Res Adv Comp Ctr Wako Saitama 3510198 Japan Univ London Imperial Coll Sci Technol & Med Dept Bioengn London SW7 2AZ England Keio Univ Dept Syst Design Engn Kohoku Ku Yokohama Kanagawa 2238522 Japan

Physiological morphometry is a critical factor in the flow dynamics in small airways. In this study, we visualized and analyzed the three-dimensional structure of the small airways without dehydration and fixation. We developed a two-step method to visualize small airways in detail by staining the lung tissue with a radiopaque solution and then visualizing the tissue with a cone-beam microfocal X-ray computed tomographic (CT) system. To verify the applicability of this staining and CT imaging (SCT) method, we used the method to visualize small airways in excised rat lungs. By using the SCT method to obtain continuous CT images, three-dimensional branching and merging bronchi ranging from 500 to 150 mum (the airway generation = 8-16) were successfully reconstructed. The morphometry of the small airways (diameter, length, branching angle and gravity angle between the gravity direction and airway vector) was analyzed using the three-dimensional thinning algorithm. The diameter and length exponentially decreased with the airway generation. The asymmetry of the bifurcation decreased with generation and one branching angle decided the other pair branching angle. The SCT method is the first reported method that yields faithful high-resolution images of soft tissue geometry without fixation and the three-dimensional morphometry of small airways is useful for studying the biomechanical dynamics in small airways. (C) 2003 Elsevier Science Ltd. All rights reserved.

关键词： cone-beam microfocal X-ray CT three-dimensional thinning algorithm sodium diatrizoate soft tissue

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