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arXiv 2023年

作者： Hiyane, Hoshu Watabe, Shohei Nikuni, Tetsuro Quantum Systems Unit Okinawa Institute of Science and Technology Graduate University Okinawa Onna904-0495 Japan Department of Physics Tokyo University of Science Shinjuku Tokyo162-8601 Japan Faculty of Engineering Computer Science and Engineering Shibaura Institute of Technology Toyosu Tokyo135-8548 Japan

We develop the moment method for Bose–Einstein condensates at finite temperatures that enable us to study collective sound modes from the hydrodynamic to the collisionless regime. In particular, we investigate collective excitations in a weakly interacting dilute Bose gas by applying the moment method to the Zaremba–Nikuni–Griffin equation, which is the coupled equation of the Boltzmann equation with the generalized Gross–Pitaevskii equation. Utilizing the moment method, collective excitations in the crossover regime between the hydrodynamic and collisionless regimes are investigated in detail. In the crossover regime, the second sound mode loses the weight of the density response function because of the significant coupling with incoherent modes, whereas the first sound shows a distinct but broad peak structure. We compare the result obtained by the moment method with that of the Landau two-fluid equations and show that the collective mode predicted by the Landau two-fluid equations well coincides with the result from the moment method even far from the hydrodynamic regime, whereas clear distinction also emerges in the relatively higher momentum regime. Copyright © 2023, The Authors. All rights reserved.

关键词： Method of moments

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Investigating the Redshift Evolution of Lensing Galaxy Density Slopes via Model-Independent Distance Ratios

arXiv

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arXiv 2025年

作者： Geng, Shuaibo Grespan, Margherita Thuruthipilly, Hareesh Harikumar, Sreekanth Pollo, Agnieszka Biesiada, Marek National Centre for Nuclear Research ul. Pasteura 7 Warsaw02-093 Poland Astronomical Observatory of the Jagiellonian University Faculty of Physics Astronomy and Applied Computer Science ul. Orla 171 Kraków30-244 Poland

Context. Strong lensing systems, expected to be abundantly discovered by next-generation surveys, provide a powerful tool for studying cosmology and galaxy evolution. The coupling between galaxy structure and cosmology through distance ratios makes examining the evolution of lensing galaxy mass density profiles essential for advancing both fields. Aims. We introduce a novel, dark energy-model-independent method to investigate the mass density slopes of lensing galaxies and their redshift evolution using an extended power-law (EPL) model. Methods. We adopt a non-parametric approach based on Artificial Neural Networks (ANNs) trained on Type Ia Supernovae (SNIa) data to reconstruct the distance ratios of strong lensing systems. These reconstructed ratios are compared with theoretical predictions to estimate the evolution of EPL model parameters. The analysis is performed at three levels - combined sample, individual lenses, and binned groups - to ensure robust estimates of the EPL parameters. Results. A negative evolutionary trend of mass density power-law exponent with increasing redshift is observed across different analysis levels. Assuming a triangular prior for the anisotropy of lensing galaxies, we find evidence for redshift evolution of the mass density slope, quantified as ∂γ/∂z = −0.20 ± 0.12. Conclusions. This study confirms that the redshift evolution of matter density slopes in lensing galaxies can be determined independent of dark energy models at the population level. Using simulations informed by Legacy Survey of Space and Time (LSST) Rubin Observatory forecasts, which is expected to identify 100,000 strongly lensed galaxies, we show that spectroscopic follow up of just 10% of these systems can reduce the uncertainty in the redshift evolution coefficient of the total mass density slope (∆∂γ/∂z) to 0.021. Such precision would be able to distinguish between evolving and non-evolving pictures for lensing galaxies. © 2025, CC BY-NC-ND.

关键词： Dark energy

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Intelligent IoT-Aided Early Sound Detection of Red Palm Weevils

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computers, Materials & Continua 2021年第12期69卷 4095-4111页

作者： Mohamed Esmail Karar Omar Reyad Abdel-Haleem Abdel-Aty Saud Owyed Mohd F.Hassan College of Computing and Information Technology Shaqra UniversityShaqra11961Saudi Arabia Department of Industrial Electronics and Control Engineering Faculty of Electronic EngineeringMenoufia UniversityEgypt Faculty of Science Sohag UniversitySohag82524Egypt Department of Physics College of SciencesUniversity of BishaBisha61922Saudi Arabia Department of Mathematics College of SciencesUniversity of BishaBisha61922Saudi Arabia Department of Computer and Information Science CeRDaSUniversiti Teknologi PetronasMalaysia

Smart precision agriculture utilizes modern information and wireless communication technologies to achieve challenging agricultural ***,Internet of Things(IoT)technology can be applied to monitor and detect harmful insect pests such as red palm weevils(RPWs)in the farms of date palm *** this paper,we propose a new IoT-based framework for early sound detection of RPWs using fine-tuned transfer learning classifier,namely *** sound sensors,namely TreeVibes devices are carefully mounted on each palm trunk to setup wireless sensor networks in the *** trees are labeled based on the sensor node number to identify the infested ***,the acquired audio signals are sent to a cloud server for further on-line analysis by our fine-tuned deep transfer learning model,i.e.,*** proposed infestation classifier has been successfully validated on the public TreeVibes *** includes total short recordings of 1754 samples,such that the clean and infested signals are 1754 and 731 samples,*** to other deep learning models in the literature,our proposed InceptionResNet-V2 classifier achieved the best performance on the public database of TreeVibes audio *** resulted classification accuracy score was 97.18%.Using 10-fold cross validation,the fine-tuned InceptionResNet-V2 achieved the best average accuracy score and standard deviation of 94.53%and±1.69,*** the proposed intelligent IoT-aided detection system of RPWs in date palm farms is the main prospect of this research work.

关键词： Red palm weevils smart precision agriculture internet of things artificial intelligence

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Biased dynamics of the miscible-immiscible quantum phase transition in a binary Bose-Einstein condensate

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Physical Review B 2024年第6期109卷 064501-064501页

作者： Francis A. Bayocboc, Jr. Jacek Dziarmaga Wojciech H. Zurek Jagiellonian University Faculty of Physics Astronomy and Applied Computer Science Institute of Theoretical Physics ul. Łojasiewicza 11 30-348 Kraków Poland Jagiellonian University Mark Kac Center for Complex Systems Research ul. Łojasiewicza 11 30-348 Kraków Poland Theoretical Division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA

A quantum phase transition from the miscible to the immiscible phase of a quasi-one-dimensional binary Bose-Einstein condensate is driven by ramping down the coupling amplitude of its two hyperfine states. It results in a random pattern of spatial domains where the symmetry is broken separated by defects. In distinction to previous studies [J. Sabbatini et al., Phys. Rev. Lett. 107, 230402 (2011), New J. Phys. 14, 095030 (2012)], we include nonzero detuning between the light field and the energy difference of the states, which provides a bias towards one of the states. Using the truncated Wigner method, we test the biased version of the quantum Kibble-Zurek mechanism [M. Rams et al., Phys. Rev. Lett. 123, 130603 (2019)] and observe a crossover to the adiabatic regime when the quench is sufficiently fast to dominate the effect of the bias. We verify a universal power law for the population imbalance in the nonadiabatic regime both at the critical point and by the end of the ramp. Shrinking and annihilation of domains of the unfavorable phase after the ramp, that is, already in the broken symmetry phase, enlarges the defect-free sections by the end of the ramp. The consequences of this phase-ordering effect can be captured by a phenomenological power law.

关键词： Quantum phase transitions Bose-Einstein condensates Stochastic dynamical systems Ultracold gases

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The formation of invariant optical soliton structures to electric-signal in the telegraph lines on basis of the tunnel diode and chaos visualization, conserved quantities: Lie point symmetry approach

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Optik 2024年 305卷

作者： Faridi, Waqas Ali Iqbal, Mujahid Ramzan, Bilal AlQahtani, Salman A. Osman, M.S. Akinyemi, Lanre Mostafa, Almetwally M. Department of Mathematics University of Management and Technology Lahore Pakistan School of Mathematical Sciences Jiangsu University Zhenjiang212013 China Department of Physics School of Science University of Management and Technology Lahore54000 Pakistan Computer Engineering Department College of Computer and Information Sciences King Saud University Riyadh Saudi Arabia Department of Mathematics Faculty of Science Cairo University Giza12613 Egypt Department of Mathematics Hampton University HamptonVA United States Department of Information Systems College Computers and Information Science King Saud University Riyadh Saudi Arabia

This study critically examines the nonlinear Lonngren wave model, a mathematical representation used to describe waves in shallow water environments such as beaches, lakes, and rivers, as well as electrical signals in semiconductor materials like tunnel diodes. The symmetry generators take into account the Lie invariance criteria. A three-dimensional Lie algebra can be obtained by using the suggested methodology. It links translation symmetries in space and time, respectively, with conservation of mass and energy. The third symmetry pertains to scaling or dilation. Recognizing the constraints of the inverse scattering transform in addressing the Cauchy problem for this equation, the investigation adopts new auxiliary equation approach to ordinary differential equations. This approach yields closed-form analytical solutions for the wave model. The obtained solutions include a plane solution, mixed hyperbolic solution, periodic and mixed periodic solutions, mixed trigonometric solution, smooth soliton, trigonometric solution, mixed singular solution, complex solitary and singular solution. Furthermore, the study develops the Hamiltonian function of the dynamical system to discuss the total energy of the system in terms of its position and momentum. Chaos analysis is performed to describe periodic, quasi-periodic, and chaotic behaviours, and a sensitivity analysis highlights the model's sensitivity to different wave numbers. Graphical representations of selected solutions are presented in both 3-D and 2-D, illustrating the behaviour under specific physical conditions. The study concludes by identifying a comprehensive set of local conservation laws for the nonlinear Lonngren wave equation, applicable to arbitrary constant coefficients, using conservation laws multipliers. © 2024 Elsevier GmbH

关键词： Nonlinear equations

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Probing Rotational Decoherence with a Trapped-Ion Planar Rotor

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Physical Review Letters 2025年第3期134卷 033601-033601页

作者： Neil Glikin Benjamin A. Stickler Ryan Tollefsen Sara Mouradian Neha Yadav Erik Urban Klaus Hornberger Hartmut Häffner Department of Physics University of California Berkeley Berkeley California 94720 USA Challenge Institute for Quantum Computation University of California Berkeley Berkeley California 94720 USA Institute for Complex Quantum Systems and Center for Integrated Quantum Science and Technology Ulm University Albert-Einstein-Allee 11 89069 Ulm Germany Department of Electrical and Computer Engineering University of Washington Seattle Washington 98195 USA Present address: Exponent Inc. Electrical Engineering and Computer Science Practice Warrenville Illinois USA. University of Duisburg-Essen Faculty of Physics Lotharstraße 1 47057 Duisburg Germany

The quantum rotor is one of the simplest model systems in quantum mechanics, but only in recent years has theoretical work revealed general fundamental scaling laws for its decoherence. For example, a superposition of orientations decoheres at a rate proportional to the sine squared of the angle between them. Here, we observe scaling laws for rotational decoherence dynamics for the first time, using a 4 μm diameter planar rotor composed of two Paul-trapped ions. We prepare the rotational motion of the ion crystal into superpositions of angular momentum with well-defined differences ranging from 1−3ℏ, and measure the rate of decoherence. We also tune the system-environment interaction strength by introducing resonant electric field noise. The observed scaling relationships for decoherence are in excellent agreement with recent theoretical work, and are directly relevant to the growing development of rotor-based quantum applications.

关键词： Trapped ions

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When invariable cross sections change: The Electron-Ion Collider case

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Physical Review D 2021年第5期103卷 L051901-L051901页

作者： Krzysztof Piotrzkowski Mariusz Przybycien Centre for Cosmology Particle Physics and Phenomenology Université catholique de Louvain 1348 Louvain-la-Neuve Belgium AGH University of Science and Technology Faculty of Physics and Applied Computer Science Aleje Mickiewicza 30 30-059 Kraków Poland

In everyday research, it is tacitly assumed that scattering cross sections have fixed values for a given particle species, center-of-mass energy, and particle polarization. However, this assumption has been called into question after several observations of suppression of high-energy bremsstrahlung. This process will play a major role in experiments at the future Electron-Ion Collider, and we show how variations of the bremsstrahlung cross section can be profoundly studied there using the lateral beam displacements. In particular, we predict a very strong increase of the observed cross sections for large beam separations. We also discuss the relation of these elusive effects to other quantum phenomena occurring over macroscopic distances. In this context, spectacular and possibly useful properties of the coherent bremsstrahlung at the Electron-Ion Collider are also evaluated.

关键词： Beam diagnostics Particle interactions Quantum electrodynamics

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Processing of Rare Skin Disease Multispectral Images 19th

Processing of Rare Skin Disease Multispectral Images

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19th Nordic-Baltic Conference on Biomedical Engineering and Medical physics, NBC 2023

作者： Plorina, Emilija V. Saulus, Kristine Kiss, Norbert Rudzitis, Ainars Linova, Tatjana Bliznuks, Dmitrijs Lihachev, Alexey Lihacova, Ilze Institute of Atomic Physics and Spectroscopy University of Latvia Jelgavas 3 Riga Latvia Department of Dermatology Venerology and Dermatooncology Semmelweis University Budapest Hungary Pauls Stradins Clinical University Hospital Pilsonu 13 Riga Latvia Health Center 4 Dermatology Clinic Skanstes 50 Riga Latvia Faculty of Computer Science and Information Technology Riga Technical University Kipsalas 6A Riga Latvia

ISBN: (纸本)9783031371318

Rare disease has become an emerging public health priority in the European Union. The low prevalence leads to lack of knowledge and expertise in diagnosing and treating these conditions. New approaches should be found to identify, assess, and diagnose symptoms associated with rare disease. Neurofibromatosis type I, Fabry disease and Pseudoxanthoma elasticum are rare multi-organ diseases with characteristic skin manifestations. In this study a skin imaging approach previously used for skin cancer imaging was used to assess skin lesions associated with these rare diseases. The device combines diffuse reflectance imaging with 526, 663 and 964 nm illumination and autofluorescence imaging with 405 nm excitation. Image pre-processing was done using MATLAB and ImageJ. Imaging parameters were extracted using Python. The parameters were compared to similar skin lesions which are not associated with disease. A multiparameter analysis was shown to differentiate lesions characteristic of Neurofibromatosis type I from similar lesions, however, this approach was not as effective for differentiating Pseudoxanthoma elasticum plaques and Fabry disease induced angiokeratoma from similar lesions. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.

关键词： Diseases

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Controllable spin filtering and half metallicity in β12-borophene nanoribbons

arXiv

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arXiv 2021年

作者： Norouzi, Fahimeh Farokhnezhad, Mohsen Esmaeilzadeh, Mahdi Szafran, Bartlomiej Department of Physics Iran University of Science and Technology Narmak Tehran16844 Iran Tehran19395-5531 Iran AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Kraków30-059 Poland

The experimental observation of the Dirac fermion states in β12-borophene sheets and the discovery of their novel topological properties have made them a promising candidate for spintronic applications. Here, by combining non-equilibrium Green's function (NEGF) and tight-binding (TB) approximation, we study the charge and spin transport properties through a β12-borophene nanoribbon (BNR) with the different edge shapes. We show when a BNR exposed to a nonlocal exchange magnetic field, the spin filtering occurs for both spin-up and spin-down so that the spin direction of transmitted electrons could be controlled by adjusting the energy of incoming electrons with the help of an external backgate voltage. It is found that an armchair BNR (ABNR) in the simultaneous presence of a transverse electric field and a nonlocal exchange field indicates a half-metallic nature which is electrically controllable. Moreover, the influence of local exchange fields is evaluated by exposing the edges of ABNR to ferromagnetic strips with parallel and anti-parallel configurations. Our findings show that the edge manipulations in ABNRs lead to the emergence of a giant magnetoresistance and a perfect spin filter. Finally, we studied the effects of edge vacancies and Anderson disorder on the spin-dependent conductance of an ABNR and find that the perfect spin polarization is not destroyed in the presence of Anderson disorder and various single vacancies. Our results reveal the outstanding spin transport properties of ABNRs for future spintronic devices. Copyright © 2021, The Authors. All rights reserved.

关键词： Nanoribbons

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Factorial cumulants from global baryon number conservation

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Physical Review C 2020年第6期102卷 064908-064908页

作者： Michał Barej Adam Bzdak AGH University of Science and Technology Faculty of Physics and Applied Computer Science 30-059 Kraków Poland

The proton, antiproton, and mixed proton-antiproton factorial cumulants originating from the global conservation of baryon number are calculated analytically up to the sixth order. Our results can be directly tested i... 详细信息

关键词： Particle correlations & fluctuations Relativistic heavy-ion collisions

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