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Simultaneous creation of multiple vortex-antivortex pairs in momentum space in photonic lattices

Advanced Photonics 2023年第6期5卷 92-100页

作者： Feng Li Sergei V.Koniakhin Anton V.Nalitov Evgeniia Cherotchenko Dmitry D.Solnyshkov Guillaume Malpuech Min Xiao Yanpeng Zhang Zhaoyang Zhang Xi'an Jiaotong University Key Laboratory for Physical Electronics and Devices of the Ministry of EducationShaanxi Key Laboratory of Information Photonic TechniqueSchool of Electronic Science and EngineeringFaculty of Electronics and InformationXi’anChina Institute for Basic Science Center for Theoretical Physics of Complex SystemsDaejeonRepublic of Korea Korea University of Science and Technology(UST) Basic Science ProgramDaejeonRepublic of Korea Moscow Institute of Physics and Technology DolgoprudnyiRussia University of Wolverhampton Faculty of Science and EngineeringWolverhamptonUnited Kingdom ITMO University St.PetersburgRussia Ioffe Institute St.PetersburgRussia UniversitéClermont Auvergne Institut PascalPHOTON-N2CNRSClermont INPClermont-FerrandFrance Institut Universitaire de France ParisFrance University of Arkansas Department of PhysicsFayettevilleArkansasUnited States Nanjing University School of PhysicsNational Laboratory of Solid State MicrostructuresNanjingChina

Engineering of the orbital angular momentum(OAM)of light due to interaction with photonic lattices reveals rich physics and motivates potential *** report the experimental creation of regularly distributed quantized vortex arrays in momentum space by probing the honeycomb and hexagonal photonic lattices with a single focused Gaussian *** the honeycomb lattice,the vortices are associated with Dirac ***,we show that the resulting spatial patterns of vortices are strongly defined by the symmetry of the wave packet evolving in the photonic lattices and not by their topological *** findings reveal the underlying physics by connecting the symmetry and OAM conversion and provide a simple and efficient method to create regularly distributed multiple vortices from unstructured light.

关键词： vortex photonic lattice orbital angular momentum topology symmetry

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Resonant inelastic x-ray scattering spectra of spinon, doublon, and quarton excitations of a spin-12 antiferromagnetic Heisenberg trimer chain

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physical Review B 2025年第2期111卷 024404-024404页

作者： Junli Li Jun-Qing Cheng Trinanjan Datta Dao-Xin Yao State Key Laboratory of Optoelectronic Materials and Technologies Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices Center for Neutron Science and Technology School of Physics Sun Yat-Sen University Guangzhou 510275 China School of Physical Sciences Great Bay University Dongguan 523000 China and Great Bay Institute for Advanced Study Dongguan 523000 China Department of Physics and Biophysics Augusta University 1120 15th Street Augusta Georgia 30912 USA Kavli Institute for Theoretical Physics University of California Santa Barbara California 93106 USA

We investigate the excitation spectra of a spin-1/2 antiferromagnetic Heisenberg trimer spin chain by employing a combination of numerical and theoretical techniques. Utilizing the Krylov-space correction-vector method in density matrix renormalization group (DMRG), we calculate both the direct and indirect resonant inelastic x-ray scattering (RIXS) spectra for the trimer spin chain. To interpret the observed features in the RIXS spectra, we perform a theoretical perturbative analysis to compute the energy dispersions, which are then utilized to determine the density of states (DOS) for both the single-particle and the two-particle excitation spectra. Our results show that the single-particle continua of the direct RIXS spectrum align with the energy levels observed in the DOS spectra of spinon, doublon, and quarton excitations. Furthermore, the two-particle continua are revealed in the indirect RIXS process, where all possible single-particle excitations combine to form the various two-particle excitations of the trimer spin chain. Based on our calculations, we propose the RIXS mechanism of generating the fractionalized (spinon) and collective (doublon and quarton) excitations in the trimer spin chain at both the L edge and the K edge, including discussing the interplay of these excitations in the RIXS spectrum for various trimer coupling strength. The computed energy range of the excitations suggest the possibility of experimental detection at both the L edge and the K edge within the current capabilities of RIXS instrumentation resolution.

关键词： X ray scattering

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Nanoslot-Induced Ultrastrong Phonon-Photon and Phonon-Phonon Coupling in Hybrid Organic-Inorganic Perovskites 16

Nanoslot-Induced Ultrastrong Phonon-Photon and Phonon-Phonon...

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16th Pacific Rim Conference on Lasers and Electro-Optics, CLEO-PR 2024

作者： Kim, Dasom Hou, Jin Lee, Geon Agrawal, Ayush Kim, Sunghwan Zhang, Hao Bao, Di Baydin, Andrey Wu, Wenjing Tay, Fuyang Huang, Shengxi Hagenmüller, Daivd Chia, Elbert E. M. Kim, Dai-Sik Seo, Minah Mohite, Aditya D. Kono, Junichiro Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States Sensor System Research Center Korea Institute of Science and Technology Seoul02792 Korea Republic of Department of Physics and Astronomy Seoul National University Seoul08826 Korea Republic of Department of Chemical and Biomolecular Engineering Rice University HoustonTX77005 United States Ulsan44919 Korea Republic of Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 637371 Singapore Smalley-Curl Institute Rice University HoustonTX77005 United States Université de Strasbourg Cnrs Strasbourg67000 France KU-KIST Graduate School of Converging Science and Technology Korea University Seoul02841 Korea Republic of Department of Physics and Astronomy Rice University HoustonTX77005 United States

Methods for harnessing vibrational states are desired for phonon-based technologies. We realized ultrastrong coupling of two phonon modes in perovskite materials induced by ultrastrong coupling with a common photonic ... 详细信息

ISBN: (纸本)9798350372076

关键词： Organic-inorganic materials

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Artificial intelligence goes from predicting structure to predicting stability

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Magnetic Resonance Letters 2025年 80-81页

作者： Gary J.Pielak Conggang Li Maili Liu Department of Chemistry Department of Biochemistry & Biophysics Lineberger Cancer Center and Integrative Program for Biological and Genome Sciences University of North Carolina at Chapel Hill Key Laboratory of Magnetic Resonance in Biological Systems State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in Wuhan Wuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences

AlphaFold [1] has turned everyone into a structural *** need for knowledge of Fourier transforms or spectral density,driven by artificial intelligence(AI),all one needs to do is enter the primary structure of a folded protein,and out pops a tertiary structure nearly as good as one from an experiment-based *** pointed out by Chen et al.[2],there is a hitch,AlphaFold is a black box because it cannot provide fundamental information about the path the unfolded chain traversed to get the final structure,nor can it tell you the *** authors give an excellent analogy:Mendeleev used empirical observation to show the layout of the periodic table of the elements,but it took physics another 50 years to explain the fundamental reasons it is correct.

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Interferometric scattering microscopy

NATURE REVIEWS METHODS PRIMERS

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NATURE REVIEWS METHODS PRIMERS 2025年第1期5卷 1页

作者： [Anonymous] Departments of Chemistry and Physics University of California Berkeley Berkeley CA USA Materials Science Division Chemical Science Division and Molecular Biophysics and Integrated Bioimaging Division Lawrence Berkeley National Laboratory Berkeley CA USA STROBE National Science Foundation Science and Technology Center University of California Berkeley Berkeley CA USA Kavli Energy NanoSciences Institute at Berkeley Berkeley CA USA Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan The Kavli Institute for Nanoscience Discovery University of Oxford Oxford UK Physical and Theoretical Chemistry Laboratory Department of Chemistry University of Oxford Oxford UK Institute of Photonics and Electronics of the Czech Academy of Sciences Prague Czech Republic Max Planck Institute for the Science of Light Erlangen Germany Max-Planck-Zentrum für Physik und Medizin Erlangen Germany Department of Physics Friedrich-Alexander University Erlangen–Nürnberg Erlangen Germany

Over the past two decades, interferometric scattering (iSCAT) microscopy has become a powerful label-free imaging method with a range of applications in fundamental science and technology. iSCAT detects the scattering of subwavelength entities through interference with a reference beam of light. Performed in a variety of illumination and detection schemes, iSCAT has exploited both amplitude and phase information to reach single-molecule detection sensitivity; to determine the size, mass and refractive index of nanoparticles; to achieve high spatiotemporal precision in 3D tracking of nanoparticles; to image subcellular nanostructures; and to quantify ultrafast diffusion and transport of energy in solids. In this Primer, we describe the basic principles of iSCAT detection and imaging from theoretical and practical points of view. We discuss various factors that affect the attainable signal-to-noise ratio, which in turn determines crucial performance features such as sensitivity and speed. We survey selected applications in which iSCAT has been instrumental in providing new insights. Finally, we discuss some of the current challenges and potential avenues for advancing the technique further.

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The ALMA-QUARKS Survey.Ⅱ.The ACA 1.3 mm Continuum Source Catalog and the Assembly of Dense Gas in Massive Star-Forming Clumps

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Research in Astronomy and Astrophysics 2024年第6期24卷 119-139页

作者：许峰玮 Ke Wang Tie Liu Lei Zhu Guido Garay Xunchuan Liu Paul Goldsmith Qizhou Zhang Patricio Sanhueza Shengli Qin Jinhua He Mika Juvela Anandmayee Tej Hongli Liu Shanghuo Li Kaho Morii Siju Zhang Jianwen Zhou Amelia Stutz Neal JEvans Kee-Tae Kim Shengyuan Liu Diego Mardones Guangxing Li Leonardo Bronfman Ken’ichi Tatematsu Chang Won Lee Xing Lu Xiaofeng Mai Sihan Jiao James O.Chibueze Keyun Su Viktor L.Tóth Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Department of Astronomy School of PhysicsPeking UniversityBeijing 100871China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Departamento de Astronomía Universidad de ChileLas Condes7591245 SantiagoChile Jet Propulsion Laboratory California Institute of Technology4800 Oak Grove DrivePasadena CA 91109USA Center for Astrophysics|Harvard&Smithsonian 60 Garden StreetCambridgeMA 02138USA National Astronomical Observatory of Japan National Institutes of Natural Sciences2-21-1 OsawaMitakaTokyo 181-8588Japan Astronomical Science Program The Graduate University for Advanced StudiesSOKENDAI2-21-1 OsawaMitakaTokyo 181-8588Japan School of Physics and Astronomy Yunnan UniversityKunming 650091China Yunnan Observatories Chinese Academy of SciencesKunming 650216China Department of Physics University of HelsinkiPO Box 64FI-00014 HelsinkiFinland Indian Institute of Space Science and Technology Thiruvananthapuram 695547KeralaIndia Max Planck Institute for Astronomy Königstuhl 17D-69117 HeidelbergGermany Department of Astronomy Graduate School of ScienceThe University of Tokyo7-3-1 HongoBunkyo-kuTokyo 113-0033Japan Max-Planck-Institut für Radioastronomie Auf dem Hügel 6953121 BonnGermany Departamento de AstronomÂıa Universidad de ConcepcionCasilla 160-CConcepci onChile Department of Astronomy The University of Texas at AustinTexas 78712-1205USA Korea Astronomy and Space Science Institute 776 Daedeokdae-roYuseong-guDaejeon 34055Republic of Korea Institute of Astronomy and Astrophysics Academia SinicaRoosevelt RoadTaipei 10617TaiwanChina South-Western Institute for Astronomy Research Yunnan UniversityKunming 650091China Korea Astronomy and Space Science Institute 776 Daedeok-daeroYuseong-guDaejeon 34055Republic of

Leveraging the high resolution,sensitivity,and wide frequency coverage of the Atacama Large Millimeter/submillimeter Array(ALMA),the QUARKS survey,standing for“Querying Underlying mechanisms of massive star formation with ALMA-Resolved gas Kinematics and Structures”,is observing 139 massive starforming clumps at ALMA Band 6(λ~1.3 mm).This paper introduces the Atacama Compact Array(ACA)7 m data of the QUARKS survey,describing the ACA observations and data *** multiwavelength data,we provide the first edition of QUARKS atlas,offering insights into the multiscale and multiphase interstellar medium in high-mass star *** ACA 1.3 mm catalog includes 207 continuum sources that are called ACA *** gas kinetic temperatures are estimated using three formaldehyde transitions with a non-LTE radiation transfer model,and the mass and density are derived from a dust emission *** ACA sources are massive(16–84 percentile values of 6–160 M_(⊙)),gravity-dominated(M∝R^(1.1))fragments within massive clumps,with supersonic turbulence(M>1)and embedded star-forming *** find a linear correlation between the masses of the fragments and the massive clumps,with a ratio of 6%between the *** considering fragments as representative of dense gas,the ratio indicates a dense gas fraction(DGF)of 6%,although with a wide scatter ranging from 1%to 10%.If we consider the QUARKS massive clumps to be what is observed at various scales,then the size-independent DGF indicates a self-similar fragmentation or collapsing mode in protocluster *** the ACA data over four orders of magnitude of luminosity-to-mass ratio(L/M),we find that the DGF increases significantly with L/M,which indicates clump evolutionary *** observed a limited fragmentation at the subclump scale,which can be explained by a dynamic global collapse process.

关键词： stars:formation ISM:kinematics and dynamics ISM:clouds stars:protostars

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Publisher's Note: "physically interpretable performance metrics for clustering" [J. Chem. Phys. 161, 244106 (2024)]

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The Journal of chemical physics 2025年第6期162卷 069902页

作者： Kinjal Mondal Jeffery B Klauda Institute for Physical Science and Technology Biophysics Program University of Maryland College Park Maryland 20742 USA. Department of Chemical and Biomolecular Engineering University of Maryland College Park Maryland 20742 USA.

This article was originally published online on 26 December 2024 with errors on page 12 and Refs. 23 and 24. On page 12, last paragraph in the left column, the

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Survival of the fittest? Peak oxygen uptake and all-cause mortality among older adults in Norway

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Progress in Cardiovascular Diseases 2025年 89卷 25-34页

作者： Tari, Atefe R. Brissach, Daniel E. Ingeström, Emma M.L. Nauman, Javaid Tyrell, Tristan Foster, Carl Radtke, Kimberley Porcari, John P. Lydersen, Stian Kaminsky, Leonard A. Myers, Jonathan Walker, Tara L. Coombes, Jeff S. Stensvold, Dorthe Wisløff, Ulrik Cardiac Exercise Research Group (CERG) Department of Circulation and Medical Imaging Faculty of Medicine and Health Sciences Norwegian University of Science and Technology (NTNU) Trondheim Norway Department of Neurology St. Olavs Hospital Trondheim University Hospital Trondheim Norway Institute of Public Health College of Medicine and Health Sciences United Arab Emirates University Al-Ain United Arab Emirates University of Wisconsin-La Crosse La Crosse WI United States Regional Centre for Child and Youth Mental Health and Child Welfare Department of Mental Health NTNU-Norwegian University of Science and Technology Trondheim Norway Fisher Institute of Health and Well-Being Clinical Exercise Physiology Program Ball State University Muncie IN United States Division of Cardiology Veterans Affairs Palo Alto Healthcare System and Stanford University CA United States Clem Jones Centre for Ageing Dementia Research Queensland Brain Institute The University of Queensland Brisbane Australia Centre for Research on Exercise Physical Activity and Health School of Human Movement and Nutrition Sciences The University of Queensland Brisbane QLD Australia

Objective: To determine the cardiorespiratory fitness (CRF) levels needed to avoid the Grim Reaper (Death) among older adults. We hypothesized that an above average peak oxygen uptake (VO_2peak) is needed for 70–77-year-old men and women to delay the encounter with Death. Design: Prospective cohort study. Setting: General population of older adults in Norway. Participants: 788 women and 777 men aged 70–77 years. Intervention: Clinical assessments, including a test of VO_2peak. Participants were categorised based on their baseline VO_2peak and changes after 1 year. This study explored associations between VO_2peak and 5-year all-cause mortality using Cox proportional hazard models. Main outcome measure: All-cause mortality. Results: Death caught up with 5.3 % of men and 3.7 % of women. Compared to unfit men and women, fewer men (Hazard Ratio [HR]: 0.34, 95 % Confidence Interval [CI] 0.15–0.78) and women (HR: 0.41, 95 % CI 0.17–0.98) classified as moderately fit encountered Death with no additional risk reduction among those classified as being more fit. It appears to be easier for the Grim Reaper to claim those in poorer physical condition, specifically VO_2peak levels <26.5 mL/kg/min for men and 22.2 mL/kg/min for women (corresponding to ≥85 % of the observed age- and sex-specific average). Conclusion: The Grim Reaper typically targets individuals with VO_2peak levels <26.5 mL/kg/min/ and <22.2 mL/kg/min when chasing male and female souls aged 70–77 years, respectively, reflecting his penchant for limited CRF. These data underscore the importance of maintaining or enhancing CRF throughout life, providing clear targets for clinicians in assessing patient CRF levels. Trial registration: *** NCT01666340. © 2024 Elsevier Inc.

关键词： All cause-mortality Clinical cardiorespiratory fitness targets Generation 100 Grim Reaper Objectively measured VO2peak Older men and women

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Cooperation and Competition in Synchronous Open Quantum Systems

arXiv

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arXiv 2023年

作者： Murtadho, Taufiq Vinjanampathy, Sai Thingna, Juzar Daejeon34126 Korea Republic of Basic Science Program Korea University of Science and Technology Daejeon34113 Korea Republic of School of Physical and Mathematical Science Nanyang Technological University Singapore639798 Singapore Department of Physics Indian Institute of Technology-Bombay Powai Mumbai400076 India Centre of Excellence in Quantum Information Computation Science and Technology Indian Institute of Technology Bombay Powai Mumbai400076 India Centre for Quantum Technologies National University of Singapore 3 Science Drive 2 Singapore117543 Singapore Department of Physics and Applied Physics University of Massachusetts LowellMA01854 United States

Synchronization between limit cycle oscillators can arise through entrainment to an external drive or through mutual coupling. The interplay between the two mechanisms has been studied in classical synchronizing systems, but not in quantum systems. Here, we point out that competition and cooperation between the two mechanisms can occur due to phase pulling and phase repulsion in quantum systems. We study their interplay in collectively driven degenerate quantum thermal machines and show that these mechanisms either cooperate or compete depending on the working mode of the machine (refrigerator or engine). The entrainment-mutual synchronization interplay persists with an increase in the number of degenerate levels, while in the thermodynamic limit of degeneracy, mutual synchronization dominates. Overall, our work investigates the effect of degeneracy and multilevel scaling of quantum synchronization and shows how different synchronizing mechanisms can cooperate and compete in quantum systems. © 2023, CC BY.

关键词： Synchronization

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Synchronization Lower Bounds the Efficiency of Near-Degenerate Thermal Machines

arXiv

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arXiv 2023年

作者： Murtadho, Taufiq Thingna, Juzar Vinjanampathy, Sai Daejeon34126 Korea Republic of Basic Science Program Korea University of Science and Technology Daejeon34113 Korea Republic of School of Physical and Mathematical Science Nanyang Technological University Singapore639798 Singapore Department of Physics and Applied Physics University of Massachusetts LowellMA01854 United States Department of Physics Indian Institute of Technology-Bombay Powai Mumbai400076 India Centre of Excellence in Quantum Information Computation Science and Technology Indian Institute of Technology Bombay Powai Mumbai400076 India Centre for Quantum Technologies National University of Singapore 3 Science Drive 2 Singapore117543 Singapore

We study the relationship between quantum synchronization and the thermodynamic performance of a four-level near-degenerate extension of the Scovil–Schulz-DuBois thermal maser. We show how the existence of interacting coherences can potentially modify the relationship between synchronization and the coherent power output of such a maser. In particular, the cooperation and competition between interacting coherences, causes the coherent heat and efficiency to be bounded by the synchronization measure in addition to the well-studied power synchronization bound. Overall, our results highlight the role of quantum synchronization in the working of a thermal machine. © 2023, CC BY.

关键词： Synchronization

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