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Retraction notice to "Y2O3 reinforced B2O3–SiO2–BaO–Na2O glass system: A characterization study through physical, optical and gamma / neutron shields characteristics" [Opt. Mater. 152C (2024)/115512] (Optical Materials (2024) 152, (S0925346724006955), (10.1016/***.2024.115512))

引用

Optical Materials 2025年 165卷

作者： Alsafi, Khalid Zakaly, Hesham M.H. Aloraini, Dalal Abdullah Al-Saleh, Wafa M. Almutairi, Haifa M. Issa, Shams A.M. Shaaban, Kh S. Department of Radiology Medical Physics Unit Faculty of Medicine King Abdulaziz University Jeddah Saudi Arabia Medical Physics Unit Diagnostic Imaging Department King Abdulaziz University Hospital Jeddah Saudi Arabia Physics Department Faculty of Science Al-Azhar University Assiut Branch Egypt Istinye University Faculty of Engineering and Natural Sciences Computer Engineering Department Istanbul34396 Turkey Institute of Physics and Technology Ural Federal University Yekaterinburg620002 Russia Department of Physics College of Science Princess Nourah Bint Abdulrahman University P.O. Box 84428 Riyadh11671 Saudi Arabia College of Science and Health Professions King Saud Bin Abdulaziz University for Health Sciences Al-Ahsa P.O. Box 6664 Al-Ahsa Hofuf31982 Saudi Arabia King Abdullah International Medical Research Center Al-Ahsa Hofuf Saudi Arabia Department of Physics Faculty of Sciences Umm AL-Qura University Mecca24382 Saudi Arabia Physics Department University of Tabuk Tabuk47512 Saudi Arabia Department of Chemistry Faculty of Science Al - Azhar University P.O. 71524 Assiut Egypt

This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://***/locate/withdrawalpolicy). Upon request of the Editor-in-Chief seven articles have been retracted, among which is this article: "through physical, optical and gamma/neutron shields characteristics,Vol.152,115512,June 2024". The XRD traces of selected samples, including across different publications reporting different materials, is exact to the level of the instrument noise. This exactness is not physically possible and indicates that the same data was used for different samples. Therefore, the EiC no longer has confidence in the authenticity of the data. In accordance with the journal's publishing policy, these articles are retracted. The authors disagree with the retraction and dispute the grounds for it. © 2025

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Ro-vibrational quenching calculations of C−2 in collision with H2

arXiv

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arXiv 2024年

作者： Giri, Kousik Mant, Barry Gianturco, Franco A. Wester, Roland Franz, Jan Biswas, Rupayan Lourderaj, Upakarasamy Sathyamurthy, Narayanasami Department of Computational Sciences Central University of Punjab Punjab Bathinda151401 India Institüt für Ionenphysik und Angewandte Physik Universität Innsbruck Technikerstr. 25 Innsbruck6020 Austria Institute of Physics and Applied Computer Science Faculty of Applied Physics and Mathematics Gdańsk University of Technology ul. Narutowicza 11/12 Gdańsk80-233 Poland Bhubaneswar OCC of Homi Bhabha National Institute Odisha Khurda752050 India Indian Institute of Science Education and Research SAS Nagar Punjab Mohali140306 India

The molecular anion C−2 has been of interest in the last few years as a candidate for laser cooling due to its electronic structure and favourable branching ratios to the ground electronic and vibrational state. Molecular hydrogen has been used by the Wester group in Innsbruck as a buffer gas to cool the molecule’s internal ro-vibrational motion. In the present work, we generate a new, five dimensional (5D) interaction potential for the system by considering the H2 as a rigid rotor and the C−2 as a rotating-vibrating diatomic molecule. We thereafter calculate the cross sections and rate coefficients for ro-vibrational inelastic collisions of C−2 with both para- and ortho-H2 on this new 5D ab initio potential energy surface using quantum scattering theory for the dynamics. The rates for vibrational quenching are obtained over the range of temperatures which covers the single value measured by the experiments. A comparison is also made with the earlier results using a simpler 3D interaction potential. Furthermore, para-H2 is found to be more efficient than ortho-H2 (with or without undergoing rotational excitation) in cooling C−2. The rate coefficients for cooling the anions has been computed by appropriately weighting the ortho- and para-H2 and compared with the available experimental result at 20 K. When the vibrational de-excitation rate coefficients are taken to be the ones not causing any concurrent rotational excitations in the final C−2 anions, the properly averaged results are found to get smaller and to become very close to the experimental measurements. The implications of these new results for laser cooling of C−2 are analyzed and discussed. © 2024, CC BY.

关键词： Molecules

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Scaling laws of elastic proton-proton scattering differential cross sections

arXiv

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arXiv 2024年

作者： Baldenegro, Cristian Praszalowicz, Michal Royon, Christophe Staśto, Anna M. Dipartimento di Fisica Sapienza Universitá di Roma Piazzale Aldo Moro 2 Rome00185 Italy Institute of Theoretical Physics Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University S. Lojasiewicza 11 Kraków30-348 Poland Department of Physics and Astronomy The University of Kansas LawrenceKS66045 United States Department of Physics Penn State University University Park PA16802 United States

We show that elastic scattering pp → pp differential cross sections as function of the four-momentum transfer square |t| have a universal property, such that the ratio of bump-to-dip positions is constant from the energies of the ISR to the LHC, from tens of GeV and up to the TeV scale. We explore this property to compare the geometrical scaling observed at the ISR with the recently proposed scaling law at the LHC. We argue that, at the LHC, within present experimental uncertainties, there is in fact a family of scaling laws. We discuss the constraints that the scaling laws impose on the parametrization of the elastic pp → pp scattering amplitude. © 2024, CC BY.

关键词： Germanium compounds

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Data-Driven Design of High-Curie Temperature Full-Heusler Alloys for Spintronic Applications

SSRN

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SSRN 2024年

作者： Ho, Thi H. Nguyen, Quynh Anh T. Tien, Tran Bao Kawazoe, Yoshiyuki Bui, Viet Q. University of Ulsan Korea Republic of Laboratory for Computational Physics Institute for Computational Science and Artificial Intelligence Van Lang University Ho Chi Minh City Viet Nam Faculty of Mechanical - Electrical and Computer Engineering School of Technology Van Lang University Ho Chi Minh City Viet Nam Advanced Institute of Science and Technology The University of Danang 41 Le Duan Danang Viet Nam Department of Academic Affairs The University of Danang 41 Le Duan Danang Viet Nam New Industry Creation Hatchery Center Tohoku University Sendai980-8579 Japan School of Physics Institute of Science Suranaree University of Technology 111 University Avenue Nakhon Ratchasima30000 Thailand SRM Institute of Science and Technology Tamil Nadu Kattankulathur603203 India

In this study, we employ density functional theory (DFT) and subgroup discovery (SGD) to explore the structural and magnetic properties of full cubic Heusler compounds, with a particular emphasis on their Curie temperatures (Tc) and magnetic stability. Our comprehensive examination of 2,904 structures across both L21 and Xα phases identifies configurations that exhibit both structural stability and superior magnetic properties. Notable among these, compounds such as Co2FeSi, Co2FeAl, and Cr2VGe exhibit remarkable magnetic stability, maintaining their ferromagnetic properties well above room temperature. Co2FeSi displays a substantial magnetic moment of 5.49 μB and maintains its ferromagnetic properties up to a Curie temperature of 992 K, underscoring its suitability for high-temperature applications. Similarly, Co2FeAl, with a magnetic moment of 4.72 μB, transitions to a paramagnetic state at a higher temperature of 1099 K, demonstrating enhanced thermal durability. Moreover, Cr2VGe, notable for its robust magnetic moment of 2.81 μB, retains its ferromagnetic characteristics until an exceptional 2412 K, making it extremely valuable for thermally intensive environments. These findings underscore the potential of these materials in developing durable and efficient spintronic devices that operate under extreme thermal conditions. By mapping the interplay between electronic structure and magnetic properties, our study provides a predictive framework for optimizing the performance of spintronic materials. © 2024, The Authors. All rights reserved.

关键词： Ternary alloys

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An effective field theory of holographic dark energy

arXiv

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arXiv 2021年

作者： Lin, Chunshan Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Krakow30-348 Poland

A general covariant local field theory of the holographic dark energy model is presented. It turns out the low energy effective theory of the holographic dark energy is the massive gravity theory whose graviton has 3 polarisations, including one scalar mode and two tensor modes. The Compton wavelength is the size of the future event horizon of the universe. The UV-IR correspondence in the holographic dark energy model stems from the scalar graviton's strong coupling at the energy scale that marks the breaking down of the effective field theory. © 2021, CC BY.

关键词： Holography

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Structure Formation in the Effective Field Theory of Holographic Dark Energy

arXiv

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arXiv 2021年

作者： Ganz, Alexander Lin, Chunshan Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Krakow30-348 Poland

We investigate the structure formation in the effective field theory of the holographic dark energy. The equation of motion for the energy contrast δm of the cold dark matter is the same as the one in the general relativity up to the leading order in the small scale limit k aH, provided the equation of state is Quintessence-like. Our effective field theory breaks down while the equation of state becomes phantom-like. We propose a solution to this problem by eliminating the scalar graviton. Copyright © 2021, The Authors. All rights reserved.

关键词： Equations of state

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Inflationary epoch in the presence of holographic dark energy

arXiv

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arXiv 2021年

作者： Delgado, Paola Carolina Moreira Ganz, Alexander Lin, Chunshan Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Krakow30-348 Poland

We analyze the effects of the holographic dark energy model in a single field slow-roll inflation, taking into account both the holographic and the dark radiation components. In particular, we obtain the background evolution and compute the scalar and tensor power spectra. For the scalar sector we show that the power spectrum of the curvature perturbation encompasses the standard single field result and a correction proportional to Ωhde/ǫ, where Ωhde is the fractional density of the holographic component and ǫ is the first slow-roll parameter. This correction might be of order unity in the very beginning of the inflationary phase and decays rapidly. For the primordial gravitational waves we find the spectral index receives a correction from the graviton mass term, which decays in the first inflationary e-folds. Copyright © 2021, The Authors. All rights reserved.

关键词： Power spectrum

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Unraveling the Role of Boron Dimers in the Electrical Anisotropy and Superconductivity in Boron-Doped Diamond

SSRN

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SSRN 2024年

作者： Sobaszek, Michal Kwon, Soonho Winiarski, Michal Rutkowski, Bogdan Ryl, Jacek Klimczuk, Tomasz Wang, Dongying Li, Xinwei Bockrath, Marc Bogdanowicz, Robert Goddard, William A. Gdańsk University of Technology Faculty of Electronics Telecommunications and Informatics Department of Metrology and Optoelectronics 11/12 Narutowicza Str. 80-233 Poland Materials and Process Simulation Center California Institute of Technology 1200 East California Blvd. CA91125 United States Gdańsk University of Technology Faculty of Applied Physics and Mathematics and Advanced Materials Centre Department of Solid State Physics 11/12 Narutowicza Str. Gdańsk80-233 Poland Faculty of Metals Engineering and Industrial Computer Science AGH University of Krakow Al. A. Mickiewicza 30 Kraków30-059 Poland Advanced Materials Center Gdańsk University of Technology Narutowicza 11/12 Gdańsk80-233 Poland Department of Physics The Ohio State University ColumbusOH43210 United States

We use quantum mechanics (QM) to determine the states formed by B dopants in diamond. We find that isolated B sites prefer to form BB dimers and that the dimers pair up to form tetramers (BBCBB) that prefer to aggregate parallel to the (111) surface in the direction, one double layer below the H-terminated surface double layer. These tetramers lead to metallic character (Mott metal Insulator Transition) with holes in the valence band near the Γ point and electrons in the BBCBB tetramer promoted band along the X direction. Our experiments find very significant anisotropy in the superconductivity for boron-doped diamond thin films prepared with Microwave Plasma Assisted Chemical Vapor Deposition using deuterium-rich plasma. This leads to much higher conductivity in the X direction than the Y direction, as predicted by the QM. This phase transition to the anomalous phase is linked with the emergence of boson quantum entanglement states behaving as a bosonic insulating state. These anisotropic superconducting properties of the diamond film might enable applications such as single-photon detectors. We expect that this formation of a dirty superconductivity state is related to the BBCBB tetramers found in our QM calculations. © 2024, The Authors. All rights reserved.

关键词： Dimers

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Modelling intermittent anomalous diffusion with switching fractional Brownian motion

arXiv

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arXiv 2023年

作者： Balcerek, Michal Wylomańska, Agnieszka Burnecki, Krzysztof Metzler, Ralf Krapf, Diego Faculty of Pure and Applied Mathematics Hugo Steinhaus Centre Wroclaw University of Science and Technology Wroclaw50-370 Poland Institute of Physics & Astronomy University of Potsdam Potsdam14476 Germany Asia Pacific Centre for Theoretical Physics Pohang37673 Korea Republic of Department of Electrical and Computer Engineering Colorado State University Fort CollinsCO80523 United States

The stochastic trajectories of molecules in living cells, as well as the dynamics in many other complex systems, often exhibit memory in their path over long periods of time. In addition, these systems can show dynamic heterogeneities due to which the motion changes along the trajectories. Such effects manifest themselves as spatiotemporal correlations. Despite the broad occurrence of heterogeneous complex systems in nature, their analysis is still quite poorly understood and tools to model them are largely missing. We contribute to tackling this problem by employing an integral representation of Mandelbrot’s fractional Brownian motion that is compliant with varying motion parameters while maintaining long memory. Two types of switching fractional Brownian motion are analysed, with transitions arising from a Markovian stochastic process and scale-free intermittent processes. We obtain simple formulas for classical statistics of the processes, namely the mean squared displacement and the power spectral density. Further, a method to identify switching fractional Brownian motion based on the distribution of displacements is described. A validation of the model is given for experimental measurements of the motion of quantum dots in the cytoplasm of live mammalian cells that were obtained by single-particle tracking. © 2023, CC BY.

关键词： Molecules

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Balanced Multi-view Clustering

arXiv

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arXiv 2025年

作者： Li, Zhenglai Wang, Jun Tang, Chang Zhu, Xinzhong Zhang, Wei Liu, Xinwang Faculty of data science City University of Macau 999078 China School of computer National University of Defense Technology Changsha410073 China School of computer China University of Geosciences Wuhan430074 China College of Mathematics Physics and Information Engineering Zhejiang Normal University Jinhua China Research Institute of Ningbo Cixing Co. Ltd Ningbo China Qilu University of Technology Shandong Academy of Sciences China Shandong Provincial Key Laboratory of Computing Power Internet and Service Computing Shandong Fundamental Research Center for Computer Science Jinan250000 China

Multi-view clustering (MvC) aims to integrate information from different views to enhance the capability of the model in capturing the underlying data structures. The widely used joint training paradigm in MvC is potentially not fully leverage the multi-view information, since the imbalanced and under-optimized view-specific features caused by the uniform learning objective for all views. For instance, particular views with more discriminative information could dominate the learning process in the joint training paradigm, leading to other views being under-optimized. To alleviate this issue, we first analyze the imbalanced phenomenon in the joint-training paradigm of multi-view clustering from the perspective of gradient descent for each view-specific feature extractor. Then, we propose a novel balanced multi-view clustering (BMvC) method, which introduces a view-specific contrastive regularization (VCR) to modulate the optimization of each view. Concretely, VCR preserves the sample similarities captured from the joint features and view-specific ones into the clustering distributions corresponding to view-specific features to enhance the learning process of view-specific feature extractors. Additionally, a theoretical analysis is provided to illustrate that VCR adaptively modulates the magnitudes of gradients for updating the parameters of view-specific feature extractors to achieve a balanced multi-view learning procedure. In such a manner, BMvC achieves a better trade-off between the exploitation of view-specific patterns and the exploration of view-invariance patterns to fully learn the multi-view information for the clustering task. Finally, a set of experiments are conducted to verify the superiority of the proposed method compared with state-of-the-art approaches on eight benchmark MvC datasets. The demo code of this work is publicly available at https://***/guanyuezhen/BMvC. Copyright © 2025, The Authors. All rights reserved.

关键词： Contrastive Learning

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