检索结果-内蒙古大学图书馆

Fault-tolerant quantum computation with static linear optics

学校读者我要写书评

暂无评论

arXiv 2021年

作者： Tzitrin, Ilan Matsuura, Takaya Alexander, Rafael N. Dauphinais, Guillaume Bourassa, J. Eli Sabapathy, Krishna K. Menicucci, Nicolas C. Dhand, Ish Xanadu TorontoONM5G 2C8 Canada Department of Physics University of Toronto TorontoONM5S 1A7 Canada Department of Applied Physics Graduate School of Engineering University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan Centre for Quantum Computation and Communication Technology School of Science RMIT University MelbourneVIC3000 Australia Center for Quantum Information and Control University of New Mexico AlbuquerqueNM87131 United States

The scalability of photonic implementations of fault-tolerant quantum computing based on Gottesman-Kitaev-Preskill (GKP) qubits is injured by the requirements of inline squeezing and reconfigurability of the linear optical network. In this work we propose a topologically error-corrected architecture that does away with these elements at no cost-in fact, at an advantage-to state preparation overheads. Our computer consists of three modules: a 2D array of probabilistic sources of GKP states;a depth-four circuit of static beamsplitters, phase shifters, and short delay lines;and a 2D array of homodyne detectors. The symmetry of our proposed circuit allows us to combine the effects of finite squeezing and uniform photon loss within the noise model, resulting in more comprehensive threshold estimates. These jumps over both architectural and analytical hurdles considerably expedite the construction of a photonic quantum computer. Copyright © 2021, The Authors. All rights reserved.

关键词： Delay circuits

Experimental Validation of PID and LQR control Techniques for Stabilization of Cart Inverted Pendulum System

学校读者我要写书评

暂无评论

Experimental Validation of PID and LQR Control Techniques fo...

IEEE International Conference on Recent Trends in Electronics, Information & Communication Technology

作者： Sudarshan K. Valluru Madhusudan Singh Vanshaj Khattar Mayank Singh Incubation Centre for Control Dynamical systems and Computation Electrical Engineering Department Delhi Technological University

ISBN: (数字)9781538624401

ISBN: (纸本)9781538624418

This paper describes the design and implementation of control strategies for the stabilization of a Cart Inverted Pendulum system. An experimental model of the system is considered for the design of controllers. The real-time implementation is done by employing a two-loop PID controllers for the system where the gain values are pre-determined by using Frequency Response and Linear-Quadratic Regulator (LQR) methods. A comparison is made between the proposed design strategies in terms of steady state and transient performance parameters. It is observed that Linear-Quadratic method exhibits superior performance as compared to frequency response method.

关键词： Cart inverted pendulum system PID controller LQR controller Full state feedback Proportional Integral Derivative control cart linear quadratic regulators Pelvic Inflammatory Disease frequency response control strategy Clock weights

Design of diagnostic estimators for an automated guided vehicle

学校读者我要写书评

暂无评论

IFAC-PapersOnLine 2018年第24期51卷 1004-1009页

作者： Witczak, Marcin Stetter, Ralf Buciakowski, Mariusz Theilliol, Didier Kukurowski, Norbert Institute of Control and Computation Engineering University of Zielona Góra Zielona Góra65-246 Poland Faculty of Mechanical Engineering University of Applied Sciences Ravensburg-Weingarten Doggenriedstraße Weingarten Germany Centre de Recherche en Automatique de Nancy CRAN-UMR 7039 Nancy-Universite CNRS Vandoeuvre-les-Nancy CedexF-54506 France

The paper deals with the design of virtual sensors of longitudinal forces as well as torques acting onto an automated guided vehicle. These virtual sensors are based on a measurement set associated with accelerations, velocities and yaw rate sensors mounted on the robot. Subsequently, the estimated forces and torques are used for diagnostic purposes concerning their appropriate distributions. The main novelty of the proposed approach is that it eliminates the necessity of incorporating wheel models, which usually impairs the performance of the approaches proposed in the literature. The final part of the paper presents experimental results, which clearly exhibit the performance of the proposed approach. © 2018

关键词： Automatic guided vehicles Automation Failure analysis Fault detection Mobile robots Automated guided vehicles Force balances Forces and torques Input estimation Longitudinal force observers Virtual sensor Yaw rate sensors

Time-domain multiplexed 2-dimensional cluster state: Universal quantum computing platform

学校读者我要写书评

暂无评论

arXiv 2019年

作者： Asavanant, Warit Shiozawa, Yu Yokoyama, Shota Charoensombutamon, Baramee Emura, Hiroki Alexander, Rafael N. Takeda, Shuntaro Yoshikawa, Jun-ichi Menicucci, Nicolas C. Yonezawa, Hidehiro Furusawa, Akira Department of Applied Physics School of Engineering University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan Centre for Quantum Computation and Communication Technology School of Engineering and Information Technology University of New South Wales CanberraACT2600 Australia Center for Quantum Information and Control University of New Mexico MSC07-4220 AlbuquerqueNM87131-0001 United States Centre for Quantum Computation and Communication Technology School of Science RMIT University MelbourneVIC3001 Australia

Quantum computation promises applications1-3that are thought to be impossible with classical computation. To realize practical quantum computation, the following three properties will be necessary: universality, scalability, and fault-tolerance. Universality is the ability to execute arbitrary multi-input quantum algorithms. Scalability means that computational resources such as logical qubits can be increased without requiring exponential increase in physical resources. Lastly, fault-tolerance is the ability to perform quantum algorithms in presence of imperfections and noise. A promising approach to scalability was demonstrated with the generation of onemillion-mode 1-dimensional cluster state3, a resource for one-input computation in measurement-based quantum computation (MBQC)5,6. The demonstration was based on time-domain multiplexing (TDM) approach2,4,8using continuous-variable (CV) optical flying qumodes (CV analogue of qubit). Demonstrating universality, however, has been a challenging task for any physical system and approach. Here, we present, for the first time among any physical system, experimental realization of a scalable resource state for universal MBQC: a 2-dimensional cluster state. We also prove the universality and give the methodology for utilizing this state in MBQC. Our state is based on TDM approach that allows unlimited resource generation regardless of the coherence time of the system. As a demonstration of our method, we generate and verify a 2-dimensional cluster state capable of about 5,000 operation steps on 5 inputs. Note that there are no limitation on the number of operation steps, and the number of inputs can be increased by several orders of magnitude with current technology10,11. Furthermore, by increasing the squeezing level, fault-tolerance can also be achieved by combining our method with error correction schemes for CV cluster states12,13. Thus, our work not only achieves scalable generation of resource for universal MBQC, bu

关键词： Fault tolerance

FULLY TRANSFORMER-BASED BIOMARKER PREDICTION FROM COLORECTAL CANCER HISTOLOGY: A LARGE-SCALE MULTICENTRIC STUDY

学校读者我要写书评

暂无评论

arXiv 2023年

作者： Wagner, Sophia J. Reisenbüchler, Daniel West, Nicholas P. Niehues, Jan Moritz Veldhuizen, Gregory Patrick Quirke, Philip Grabsch, Heike I. van den Brandt, Piet A. Hutchins, Gordon G.A. Richman, Susan D. Yuan, Tanwei Langer, Rupert Jenniskens, Josien Christina Anna Offermans, Kelly Mueller, Wolfram Gray, Richard Gruber, Stephen B. Greenson, Joel K. Rennert, Gad Bonner, Joseph D. Schmolze, Daniel James, Jacqueline A. Loughrey, Maurice B. Salto-Tellez, Manuel Brenner, Hermann Hoffmeister, Michael Truhn, Daniel Schnabel, Julia A. Boxberg, Melanie Peng, Tingying Kather, Jakob Nikolas Helmholtz Munich German Research Center for Environment and Health Munich Germany School of Computation Information and Technology Technical University of Munich Munich Germany Technical University Dresden Dresden Germany Division of Pathology and Data Analytics Leeds Institute of Medical Research at St James’s University of Leeds Leeds United Kingdom Department of Pathology GROW School for Oncology and Developmental Biology Maastricht University Medical Center+ Maastricht Netherlands Department of Epidemiology Maastricht University Medical Center+ Maastricht Netherlands Heidelberg Germany Institute of Pathology und Molecular Pathology Johannes Kepler University Hospital Linz Linz Austria Gemeinschaftspraxis Pathologie Starnberg Germany Nuffield Department of Population Health University of Oxford Oxford United Kingdom Center for Precision Medicine Department of Medical Oncology City of Hope National Medical Center DuarteCA United States Department of Pathology City of Hope Comprehensive Cancer Center DuarteCA United States Department of Community Medicine & Epidemiology Lady Davis Carmel Medical Center Ruth & Bruce Rappaport Faculty of Medicine Technion-Israel Institute of Technology Israel Steve and Cindy Rasmussen Institute for Genomic Medicine Lady Davis Carmel Medical Center Technion Faculty of Medicine Clalit National Cancer Control Center Haifa Israel Precision Medicine Centre of Excellence Health Sciences Building The Patrick G Johnston Centre for Cancer Research Queen’s University Belfast Belfast United Kingdom Regional Molecular Diagnostic Service Belfast Health and Social Care Trust Belfast United Kingdom The Patrick G Johnston Centre for Cancer Research Queen’s University Belfast Belfast United Kingdom Department of Cellular Pathology Belfast Health and Social Care Trust Belfast United Kingdom Centre for Public Health Queen’s University Belfast Belfast United Kingdom Integrated Pathology Unit Institute for Cancer Research Royal Mars

Background: Deep learning (DL) can extract predictive and prognostic biomarkers from routine pathology slides in colorectal cancer. For example, a DL test for the diagnosis of microsatellite instability (MSI) in CRC has been approved in 2022. Current approaches rely on convolutional neural networks (CNNs). Transformer networks are outperforming CNNs and are replacing them in many applications, but have not been used for biomarker prediction in cancer at a large scale. In addition, most DL approaches have been trained on small patient cohorts, which limits their clinical utility. Methods: In this study, we developed a new fully transformer-based pipeline for end-to-end biomarker prediction from pathology slides. We combine a pre-trained transformer encoder and a transformer network for patch aggregation, capable of yielding single and multi-target prediction at patient level. We train our pipeline on over 9,000 patients from 10 colorectal cancer cohorts. Results: A fully transformer-based approach massively improves the performance, generalizability, data efficiency, and interpretability as compared with current state-of-the-art algorithms. After training on a large multicenter cohort, we achieve a sensitivity of 0.97 with a negative predictive value of 0.99 for MSI prediction on surgical resection specimens. We demonstrate for the first time that resection specimen-only training reaches clinical-grade performance on endoscopic biopsy tissue, solving a long-standing diagnostic problem. Interpretation: A fully transformer-based end-to-end pipeline trained on thousands of pathology slides yields clinical-grade performance for biomarker prediction on surgical resections and biopsies. Our new methods are freely available under an open source license. © 2023, CC BY.

关键词： Forecasting

Universal quantum computation with temporal-mode bilayer square lattices

学校读者我要写书评

暂无评论

Physical Review A 2018年第3期97卷 032302-032302页

作者： Rafael N. Alexander Shota Yokoyama Akira Furusawa Nicolas C. Menicucci Center for Quantum Information and Control University of New Mexico MSC07-4220 Albuquerque New Mexico 87131-0001 USA Department of Physics University of Virginia Charlottesville Virginia 22903 USA Centre for Quantum Computation and Communication Technology School of Science RMIT University Melbourne Victoria 3001 Australia Centre of Quantum Computation and Communication Technology School of Engineering and Communication Technology University of New South Wales Canberra Australian Capital Territory 2600 Australia Department of Applied Physics School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan

We propose an experimental design for universal continuous-variable quantum computation that incorporates recent innovations in linear-optics-based continuous-variable cluster state generation and cubic-phase gate teleportation. The first ingredient is a protocol for generating the bilayer-square-lattice cluster state (a universal resource state) with temporal modes of light. With this state, measurement-based implementation of Gaussian unitary gates requires only homodyne detection. Second, we describe a measurement device that implements an adaptive cubic-phase gate, up to a random phase-space displacement. It requires a two-step sequence of homodyne measurements and consumes a (non-Gaussian) cubic-phase state.

关键词： Quantum information processing with continuous variables

Pole placement approach to coherent passive reservoir engineering for storing quantum information

学校读者我要写书评

暂无评论

control Theory and Technology 2017年第3期15卷 193-205页

作者： Thien NGUYEN Zibo MIAO Yu PAN Nina AMINI Valery UGRINOVSKII Matthew R. JAMES ARC Centre for Quantum Computation and Communication Technology Research School of Engineering The Australian National University Canberra ACT 2601 Australia QUANTIC lab INRIA Paris 2 rue Simone Iff 75012 Paris France Institute of Cyber-Systems and Control Zhejiang University Hangzhou Zhejiang 310027 China CNRS Laboratoire des signaux et systèmes (L25) CentraleSupélec 3 rue Joliot Curie 91192 Gif-Sur-Yvette France School of Engineering and Information Technology University of New South Wales at the Australian Defence Force Academy Canberra ACT 2600 Australia

Reservoir engineering is the term used in quantum control and information technologies to describe manipulating the environment within which an open quantum system operates. Reservoir engineering is essential in applications where storing quantum information is required. From the control theory perspective, a quantum system is capable of storing quantum information if it possesses a so-called decoherence free subsystem （DFS）. This paper explores pole placement techniques to facilitate synthesis of decoherence free subsystems via coherent quantum feedback control. We discuss limitations of the conventional ＇open loop＇ approach and propose a constructive feedback design methodology for decoherence free subsystem engineering. It captures a quite general dynamic coherent feedback structure which allows systems with decoherence free modes to be synthesized from components which do not have such modes.

关键词： Open quantum system decoherence free subsystem reservoir engineering coherent feedback control quantum control

Universal quantum computation with temporal-mode bilayer square lattices

学校读者我要写书评

暂无评论

arXiv 2017年

作者： Alexander, Rafael N. Yokoyama, Shota Furusawa, Akira Menicucci, Nicolas C. Center for Quantum Information and Control University of New Mexico MS C07-4220 AlbuquerqueNM87131-0001 United States Department of Physics University of Virginia CharlottesvilleVA22903 United States Centre for Quantum Computation and Communication Technology School of Science RMIT University MelbourneVIC3001 Australia Centre of Quantum Computation and Communication Technology School of Engineering and Communication Technology University of New South Wales CanberraACT2600 Australia Department of Applied Physics School of Engineering University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan

关键词： Crystal lattices

Pole placement approach to coherent passive reservoir engineering for storing quantum information

学校读者我要写书评

暂无评论

Pole placement approach to coherent passive reservoir engine...

American control Conference

作者： T. Nguyen Z. Miao Y. Pan N. H. Amini V. Ugrinovskii M. R. James ARC Centre for Quantum Computation and Communication Technology Research School of Engineering The Australian national University Canberra ACT 2601 Australia QUANTIC lab INRIA Paris. 2 rue Simone Iff 75012 France Centre for Quantum Information Institute of Cyber-Systems and Control Zhejiang University Hangzhou China Laboratoire des signaux et systemes CNRS 91192 Gif sur Yvette France School of Information Technology and Electrical Engineering University of New South Wales at the Australian Defence Force Academy Canberra ACT 2600 Australia

ISBN: (纸本)9781509045839

The paper explores pole placement techniques to facilitate synthesis of decoherence free subsystems via coherent quantum feedback control. We discuss limitations of the conventional 'open loop' approach and propose a constructive feedback design methodology for decoherence free subsystem engineering. It captures a quite general dynamic coherent feedback structure which allows systems with decoherence free modes to be synthesized from components which do not have such modes.

关键词： Reservoir engineering pole assignment SUB-SYSTEM quantum feedback control synthesis