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arXiv 2019年

作者： Zhao, Yuan-Yuan Zhang, Chao Cheng, Shuming Li, Xinhui Guo, Yu Liu, Bi-Heng Ku, Huan-Yu Chen, Shin-Liang Wen, Qiaoyan Huang, Yun-Feng Xiang, Guo-Yong Li, Chuan-Feng Guo, Guang-Can College of the Science China University of Petroleum Qingdao266580 China National Laboratory of Solid State Microstructures School of Physics Collaborative Innovation Center of Advanced Microstructure Nanjing University Nanjing210093 China Peng Cheng Laboratory Shenzhen518055 China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China Hefei230026 China Department of Control Science and Engineering Tongji University Shanghai201804 China Institute for Advanced Study Tongji University Shanghai200092 China Institute for Quantum Computing Baidu Research Beijing100193 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China National Laboratory of Solid State Microstructures School of Physics Nanjing University Nanjing210093 China Faculty of Physics University of Vienna Boltzmanngasse 5 Vienna1090 Austria Austrian Academy of Sciences Boltzmanngasse 3 Vienna1090 Austria Department of Physics National Chung Hsing University Taichung40227 Taiwan

Entanglement lies at the heart of quantum mechanics, and has been identified an essential resource for diverse applications in quantum information. If entanglement could be verified without any trust in the devices of observers, i.e., in a device-independent (DI) way, then the high security can be guaranteed for various quantum information processing tasks. In this work, we propose and experimentally demonstrate a DI protocol to certify the presence of entanglement based on Einstein-Podolsky-Rosen (EPR) steering. We first establish the DI verification framework by taking the advantages of measurement-device-independent technique and self-testing, which is able to verify all bipartite EPR-steerable states. In the scenario of three-measurement settings for per party, the protocol is robust in tolerance of inefficient measurements and imperfect self-testing. Moreover, a four-photon experiment is implemented for verification beyond Bell nonlocal states. Our work presents the new insight into quantum physics and paves the way for realistic implementations of secure quantum information processing tasks. Copyright © 2019, The Authors. All rights reserved.

关键词： Quantum optics

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Real-Time Automated Surveillance for Ventilator Associated Events Using Streaming Electronic Health Data

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Open Forum Infectious Diseases 2017年第SUPPL_1期4卷 S633-S633页

作者： Shenoy, Erica S Rosenthal, Eric S Biswal, Siddharth Ghanta, Manohar Ryan, Erin E Shao, Yu-Ping Suslak, Dolores Swanson, Nancy Valdery, Moura Junior Hooper, David C Westover, M Brandon Department of Medicine Division of Infectious Diseases Massachusetts General Hospital Boston Massachusetts Medical Practice Evaluation Center Department of Medicine Massachusetts General Hospital Boston Massachusetts Harvard Medical School Boston Massachusetts Infection Control Unit Massachusetts General Hospital Boston Massachusetts Department of Neurology Massachusetts General Hospital Boston Massachusetts College of Computing Georgia Institute of Technology Atlanta Georgia Clinical Data Animation Center Massachusetts General Hospital Boston Massachusetts Division of Infectious Diseases Massachusetts General Hospital Boston Massachusetts

Background Criteria defining Ventilator Associated Events (VAEs) are objective and often available in the electronic health record (EHR) data. The use of ventilation data extracted directly from the patient’s bedside monitor to allow for real-time surveillance, however, has not been previously incorporated into electronic surveillance approaches. Here we describe validation of a system that can detect and report on VAEs hospital-wide autonomously and in real-time. Methods We developed a secure informatics hardware and software platform to identify VAEs autonomously using streaming data. The automated process included 1) archiving and analysis of bedside physiologic monitor data to detect increases in positive end-expiratory pressure (PEEP) or FiO2 settings; 2) real-time querying of EHR data for leukopenia or leukocytosis and concurrent antibiotic initiation; and 3) retrieval and interpretation of microbiology reports for the presence of respiratory pathogens. The algorithm was validated on two 3-month periods in 2015 and 2016 as follows: 1) autonomous surveillance ( AS ) generated detections of three VAE subclasses: VAC, IVAC, and PVAP; 2) manual surveillance ( MS ) by Infection control (IC) staff independently performed standard surveillance based on chart review, 3) senior IC staff adjudicated the gold standard for cases of AS-MS discordance. The sensitivity (Se), specificity (Sp), and positive predictive value (PPV) of the algorithm are reported. Results The number of ventilated patients, ventilator days, and events were: 1,591/9,407/3,014. In cases with complete data, AS detected 66 VAE events identified by MS; AS detected 32 VAEs missed by MS; no MS-identified events were missed by AS. The Se, Sp, and PPV of AS and MS were: 91%/100%/100%, and 61%/100%/83%, respectively. Clinical surveillance case reports generated by AS enabled visual interpretation (figure). Conclusion We developed a surveillance tool directly streaming bedside physiologic monitor and EHR data

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Trace anomaly form factors from lattice QCD

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Physical Review D 2024年第9期109卷 094504-094504页

作者： Bigeng Wang Fangcheng He Gen Wang Terrence Draper Jian Liang Keh-Fei Liu Yi-Bo Yang Department of Physics and Astronomy University of Kentucky Lexington Kentucky USA Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA Department of Physics and Astronomy Stony Brook University Stony Brook New York 11794 USA Aix-Marseille Université Université de Toulon CNRS CPT Marseille UMR 7332 France Key Laboratory of Atomic and Subatomic Structure and Quantum Control (MOE) Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Institute of Quantum Matter South China Normal University Guangzhou 510006 China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Guangdong Provincial Key Laboratory of Nuclear Science Southern Nuclear Science Computing Center South China Normal University Guangzhou 510006 China CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced Study UCAS Hangzhou 310024 China International Centre for Theoretical Physics Asia-Pacific Beijing/Hangzhou China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China

The hadron mass can be obtained through the calculation of the trace of the energy-momentum tensor in the hadron which includes the trace anomaly and sigma terms. The anomaly due to conformal symmetry breaking is believed to be an important ingredient for hadron mass generation and confinement. In this work, we will present the calculation of the glue part of the trace anomaly form factors of the pion up to Q2∼4.3 GeV2 and the nucleon up to Q2∼1 GeV2. The calculations are performed on a domain wall fermion ensemble with overlap valence quarks at seven valence pion masses varying from ∼250 to ∼540 MeV, including the unitary point ∼340 MeV. We calculate the radius of the glue trace anomaly for the pion and the nucleon from the z expansion. By performing a two-dimensional Fourier transform on the glue trace anomaly form factors in the infinite momentum frame with no energy transfer, we also obtain their spatial distributions for several valence quark masses. The results are qualitatively extrapolated to the physical valence pion mass with systematic errors from the unphysical sea quark mass, discretization effects in the renormalization sum rule, and finite-volume effects to be addressed in the future. We find the pion’s form factor changes sign, as does its spatial distribution, for light quark masses. This explains how the trace anomaly contribution to the pion mass approaches zero toward the chiral limit.

关键词： Form factors Hadrons Mass Lattice QCD Lattice gauge theory

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Global constraint on the jet transport coefficient from single hadron, dihadron and γ-hadron spectra in high-energy heavy-ion collisions

arXiv

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arXiv 2022年

作者： Xie, Man Ke, Weiyao Zhang, Hanzhong Wang, Xin-Nian Key Laboratory of Quark and Lepton Physics MOE Institute of Particle Physics Central China Normal University Wuhan430079 China Key Laboratory of Atomic and Subatomic Structure and Quantum Control MOE Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Institute of Quantum Matter South China Normal University Guangzhou510006 China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Guangdong Provincial Key Laboratory of Nuclear Science Southern Nuclear Science Computing Center South China Normal University Guangzhou510006 China Department of Physics University of California BerkeleyCA94720 United States Nuclear Science Division MS 70R0319 Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Theoretical Division Los Alamos National Laboratory Los AlamosNM87545 United States

Modifications of large transverse momentum single hadron, dihadron, and γ-hadron spectra in relativistic heavy-ion collisions are direct consequences of parton-medium interactions in the quark-gluon plasma (QGP). The interaction strength and underlying dynamics can be quantified by the jet transport coefficient qˆ. We carry out the first global constraint on qˆ using a next-to-leading order pQCD parton model with higher-twist parton energy loss and combining world experimental data on single hadron, dihadron, and γ-hadron suppression at both RHIC and LHC energies with a wide range of centralities. The global Bayesian analysis using the information field (IF) priors provides the most stringent constraint on qˆ(T). We demonstrate in particular the progressive constraining power of the IF Bayesian analysis on the strong temperature dependence of qˆ using data from different centralities and colliding energies. We also discuss the advantage of using both inclusive and correlation observables with different geometric biases. As a verification, the obtained qˆ(T) is shown to describe data on single hadron anisotropy at high transverse momentum well. Predictions for future jet quenching measurements in oxygen-oxygen collisions are also provided. © 2022, CC BY.

关键词： Hadrons

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Strong coupling between a single photon and a photon pair

arXiv

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arXiv 2024年

作者： Wang, Shuai-Peng Mercurio, Alberto Ridolfo, Alessandro Wang, Yuqing Chen, Mo Liu, Yulong Sun, Huanying Li, Tiefu Nori, Franco Savasta, Salvatore You, J.Q. Beijing Academy of Quantum Information Sciences Beijing100193 China Quantum Physics and Quantum Information Division Beijing Computational Science Research Center Beijing100193 China Zhejiang Key Laboratory of Micro-Nano Quantum Chips and Quantum Control School of Physics State Key Laboratory for Extreme Photonics and Instrumentation Zhejiang University Hangzhou310027 China Dipartimento di Scienze Matematiche e Informatiche Scienze Fisiche e Scienze della Terra Università di Messina MessinaI-98166 Italy Dipartimento di Fisica e Astronomia Università di Catania Catania95123 Italy School of Integrated Circuits Frontier Science Center for Quantum Information Tsinghua University Beijing100084 China Quantum Computing Center Cluster for Pioneering Research RIKEN Saitama Wako-shi351-0198 Japan Physics Department The University of Michigan Ann ArborMI48109-1040 United States

The realization of strong nonlinear coupling between single photons has been a long-standing goal in quantum optics and quantum information science, promising wide impact applications, such as all-optical deterministic quantum logic and single-photon frequency conversion [1, 2]. Here, we report an experimental observation of the strong coupling between a single photon and a photon pair in an ultrastrongly-coupled circuit-QED system. This strong nonlinear interaction is realized by introducing a detuned flux qubit working as an effective coupler between two modes of a superconducting coplanar waveguide resonator. The ultrastrong light-matter interaction breaks the excitation number conservation, and an external flux bias breaks the parity conservation. The combined effect of the two enables the strong one-two-photon coupling [3]. Quantum Rabi-like avoided crossing is resolved when tuning the two-photon resonance frequency of the first mode across the single-photon resonance frequency of the second mode. Within this new photonic regime, we observe the second harmonic generation for a mean photon number below one. Our results represent a key step towards a new regime of quantum nonlinear optics, where individual photons can deterministically and coherently interact with each other in the absence of any stimulating fields [3, 4]. © 2024, CC BY.

关键词： Particle beams

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Quantum versus Classical Regime in Circuit Quantum Acoustodynamics

arXiv

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arXiv 2020年

作者： Zeng, Gang-Hui Zhang, Yang Bolgar, Aleksey N. He, Dong Li, Bin Ruan, Xin-Hui Zhou, Lan Kuang, Le-Mang Astafiev, Oleg V. Liu, Yu-Xi Peng, Z.H. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Key Laboratory for Matter Microstructure and Function of Hunan Province Department of Physics Synergetic Innovation Center for Quantum Effects and Applications Hunan Normal University Changsha410081 China Institute of Microelectronics Tsinghua University Beijing100084 China Moscow Institute of Physics and Technology Institutskiy Pereulok 9 Dolgoprudny141701 Russia Institute for Quantum Information State Key Laboratory of High Performance Computing Changsha410081 China Skolkovo Institute of Science and Technology Nobel str. 3 Moscow143026 Russia Royal Holloway University of London Egham Surrey TW20 0EX United Kingdom National Physical Laboratory TeddingtonTW11 0LW United Kingdom Frontier Science Center for Quantum Information Beijing China

We experimentally study a circuit quantum acoustodynamics system, which consists of a superconducting artificial atom, coupled to both a two-dimensional surface acoustic wave resonator and a one-dimensional microwave transmission line. The strong coupling between the artificial atom and the acoustic wave resonator is confirmed by the observation of the vacuum Rabi splitting at the base temperature of dilution refrigerator. We show that the propagation of microwave photons in the microwave transmission line can be controlled by a few phonons in the acoustic wave resonator. Furthermore, we demonstrate the temperature effect on the measurements of the Rabi splitting and temperature induced transitions from high excited dressed states. We find that the spectrum structure of two-peak for the Rabi splitting could become into those of several peaks under some special experimental conditions, and gradually disappears with the increase of the environmental temperature T. The continuous quantum-to-classical crossover is observed around the crossover temperature Tc, which is determined via the thermal fluctuation energy kBT and the characteristic energy level spacing of the coupled system. Experimental results agree well with the theoretical simulations via the master equation of the coupled system at different effective temperatures. Copyright © 2020, The Authors. All rights reserved.

关键词： Telecommunication lines

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Mutual information for diagnosis of AD

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Journal of the Neurological Sciences 2013年 333卷 e355-e355页

作者： M. Vališ O. Vyšata A. Procházka L. Šimůnek J. Hort L. Pazdera Department of Neurology Faculty Hospital Charles University Hradec Králové /INS；Czech Republic/INS Department of Computing and Control Engineering Institute of Chemical Technology Praque /INS；Czech Republic/INS Department of Neurology International Clinical Research Centre St. Anne'/INS；s University Hospital Brno /INS；Czech Republic/INS Department of Neurology 2nd Faculty of Medicine Charles University Praque /INS；Czech Republic/INS Motol University Hospital Praque /INS；Czech Republic/INS Neurocentre Caregroup Ltd. Rychnov nad Kneznou Czech Republic

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A new method to access heavy meson lightcone distribution amplitudes from first-principle

arXiv

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arXiv 2024年

作者： Han, Xue-Ying Hua, Jun Ji, Xiangdong Lü, Cai-Dian Wang, Wei Xu, Ji Zhang, Qi-An Zhao, Shuai Institute of High Energy Physics CAS Beijing100049 China School of Physics University of Chinese Academy of Sciences Beijing100049 China Key Laboratory of Atomic and Subatomic Structure and Quantum Control MOE Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Institute of Quantum Matter South China Normal University Guangzhou510006 China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Guangdong Provincial Key Laboratory of Nuclear Science Southern Nuclear Science Computing Center South China Normal University Guangzhou510006 China Department of Physics University of Maryland College ParkMD20742 United States Shanghai Key Laboratory for Particle Physics and Cosmology Key Laboratory for Particle Astrophysics and Cosmology MOE School of Physics and Astronomy Shanghai Jiao Tong University Shanghai200240 China Institute of Modern Physics Chinese Academy of Sciences Guangdong Province Huizhou516000 China School of Physics and Microelectronics Zhengzhou University Henan Zhengzhou450001 China School of Physics Beihang University Beijing102206 China Department of Physics Tianjin University Tianjin300350 China

We present a method to compute lightcone distribution amplitudes (LCDAs) of heavy meson within heavy quark effective theory (HQET). Our method utilizes quasi distribution amplitudes (quasi-DAs) with a large momentum component Pz. We point out that by sequentially integrating out Pz and mH, one can disentangle different dynamical scales. Integrating out Pz allows to connect quasi-DAs to QCD LCDAs, and then integrating out mH enables to relate QCD LCDAs to HQET LCDAs. To verify this proposal, we make use of lattice QCD simulation on a lattice ensemble with spacing a = 0.05187 fm. The preliminary findings for HQET LCDAs qualitatively align with phenomenological models. Using a recent model for HQET LCDAs, we also fit the first inverse moment λ−1B and the result is consistent with the experimentally constrain from B → γν. This agreement demonstrates the promise of our method in providing first-principle predictions for heavy meson LCDAs. © 2024, CC BY.

关键词： Hadrons

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The radiative decay of scalar glueball from lattice QCD

arXiv

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arXiv 2024年

作者： Zou, Jintao Gui, Long-Cheng Qin, Wen Chen, Ying Liang, Jian Jiang, Xiangyu Yang, Yibo Department of Physics Hunan Normal University Changsha410081 China Department of Physics Hunan Normal University Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Changsha410081 China Hunan Normal University Changsha410081 China Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Institute of Quantum Matter South China Normal University Guangzhou510006 China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Guangdong Provincial Key Laboratory of Nuclear Science Southern Nuclear Science Computing Center South China Normal University Guangzhou510006 China CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100049 China International Centre for Theoretical Physics Asia-Pacific Beijing Hangzhou100190 China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced Study UCAS Hangzhou310024 China

We perform the first lattice QCD study on the radiative decay of the scalar glueball to the vector meson in the quenched approximation. The calculations are carried out on three gauge ensembles with different lattice spacings, which enable us to do the continuum extrapolation. We first revisit the radiative J/ψ decay into the scalar glueball G and obtain the partial decay width Γ(J/ψ → γG) = 0.578(86) keV and the branching fraction Br(J/ψ → γG) = 6.2(9) × 10−3. We then extend the similar calculation to the process G → γ and get the partial decay width Γ(G → γ) = 0.074(47) keV, which implies that the combined branching fraction of J/ψ → γG → γγ is as small as O(10−9) such that this process is hardly detected by the BESIII experiment even with the large J/ψ sample of O(1010). With the vector meson dominance model, the two-photon decay width of the scalar glueball is estimated to be Γ(G → γγ) = 0.53(46) eV, which results in a large stickiness S(G) ∼ O(104) of the scalar glueball by assuming the stickiness of f2(1270) to be one. © 2024, CC BY.

关键词： Bosons

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Metric for attractor overlap

arXiv

引用

arXiv 2017年

作者： Ishar, Rishabh Kaiser, Eurika Morzynski, Marek Fernex, Daniel Semaan, Richard Albers, Marian Meysonnat, Pascal S. Schröder, Wolfgang Noack, Bernd R. Department of Mechanical Engineering Punjab Engineering College Chandigarh160012 India University of Washington Department of Mechanical Engineering Stevens Way Box 352600 SeattleWA98195 United States Poznan University of Technology Chair of Virtual Engineering Jana Pawla II 24 PoznanPL 60-965 Poland Institut für Strömungsmechanik Technische Universität Braunschweig Hermann-Blenk-Str. 37 Braunschweig38108 Germany Institute of Aerodynamics RWTH Aachen University Wüllnerstr. 5a Aachen52062 Germany Forschungszentrum Jülich JARA-High-Performance Computing Jülich52425 Germany Laboratoire d'Informatique pour la Mecanique et les Sciences de l'Ingenieur LIMSI-CNRS Rue John von Neumann Campus Universitaire d'Orsay Bat 508 Orsay Cedex91403 France Technische Universität Berlin Müller-Breslau-Strae 8 Berlin10623 Germany Institute for Turbulence-Noise-Vibration Interaction and Control Harbin Institute of Technology Shenzhen Campus China

We present the first general metric for attractor overlap (MAO) facilitating an unsupervised comparison of flow data sets. The starting point is two or more attractors, i.e., ensembles of states representing different operating conditions. The proposed metric generalizes the standard Hilbert-space distance between two snapshots to snapshot ensembles of two attractors. A reduced-order analysis for big data and many attractors is enabled by coarse-graining the snapshots into representative clusters with corresponding centroids and population probabilities. For a large number of attractors, MAO is augmented by proximity maps for the snapshots, the centroids, and the attractors, giving scientifically interpretable visual access to the closeness of the states. The coherent structures belonging to the overlap and disjoint states between these attractors are distilled by few representative *** employ MAO for two quite different actuated flow configurations: A two-dimensional wake with vortices in a narrow frequency range and three-dimensional wall turbulence with broadband spectrum. In the first application, seven control laws are applied to the uidic pinball, i.e., the two-dimensional flow around three circular cylinders whose centers form an equilateral triangle pointing in the upstream direction. These seven operating conditions comprise unforced shedding, boat tailing, base bleed, high- and low-frequency forcing as well as two opposing Magnus effects. In the second example, MAO is applied to three-dimensional simulation data from an open-loop drag reduction study of a turbulent boundary layer. The actuation mechanisms of 38 spanwise traveling transversal surface waves are investigated. MAO compares and classifies these actuated flows in agreement with physical intuition. For instance, the first feature coordinate of the attractor proximity map correlates with drag for the uidic pinball and for the turbulent boundary layer. MAO has a large spectrum of potential

关键词： Dynamical systems

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