Newton ((New York, N.Y.)最新文献

Dependence of quantum timescales on symmetry. 量子时标对对称性的依赖。

Newton ((New York, N.Y.) Pub Date : 2026-04-06 DOI: 10.1016/j.newton.2025.100374

Fei Guo, Dmitry Usanov, Eduardo B Guedes, Mauro Fanciulli, Kaishu Kawaguchi, Ryo Mori, Takeshi Kondo, Arnaud Magrez, Michele Puppin, J Hugo Dil

{"title":"Dependence of quantum timescales on symmetry.","authors":"Fei Guo, Dmitry Usanov, Eduardo B Guedes, Mauro Fanciulli, Kaishu Kawaguchi, Ryo Mori, Takeshi Kondo, Arnaud Magrez, Michele Puppin, J Hugo Dil","doi":"10.1016/j.newton.2025.100374","DOIUrl":"https://doi.org/10.1016/j.newton.2025.100374","url":null,"abstract":"The role of time in quantum mechanics and the timescale associated with quantum transitions remains an open question in physics, especially on an experimental level. Here we use an experimental method based on spin- and angle-resolved photoemission spectroscopy from spin-degenerate dispersive states to determine the Eisenbud-Wigner-Smith time delay of photoemission. This timescale of the quantum transition is measured for materials with different dimensionality and correlation strength. A direct link is found between the dimensionality, or rather the symmetry, of the system and the attosecond timescale of the quantum transition. The quasi 2-dimensional transition metal dichalcogenides 1T-TiSe2 and 1T-TiTe2 show timescales around 150 as, whereas in quasi 1-dimensional CuTe, the transition takes more than 200 as. This is in stark contrast with the 26 as obtained for 3-dimensional pure Cu. These results provide new insights into the role of symmetry in quantum timescales and may provide a route to understanding the role of time in quantum mechanics.","PeriodicalId":520445,"journal":{"name":"Newton ((New York, N.Y.)","volume":"2 4","pages":"None"},"PeriodicalIF":0.0,"publicationDate":"2026-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13053218/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147641201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Johari-Goldstein relaxation in quenched and irradiated chalcogenide glasses. 猝灭和辐照硫系玻璃中的Johari-Goldstein弛豫。

Newton ((New York, N.Y.) Pub Date : 2026-03-02 DOI: 10.1016/j.newton.2025.100338

Jacopo Baglioni, Alessandro Martinelli, Peihao Sun, Francesco Dallari, Lara Piemontese, Muhammad Umair, Fabian Westermeier, Michael Sprung, Giulio Monaco

{"title":"Johari-Goldstein relaxation in quenched and irradiated chalcogenide glasses.","authors":"Jacopo Baglioni, Alessandro Martinelli, Peihao Sun, Francesco Dallari, Lara Piemontese, Muhammad Umair, Fabian Westermeier, Michael Sprung, Giulio Monaco","doi":"10.1016/j.newton.2025.100338","DOIUrl":"https://doi.org/10.1016/j.newton.2025.100338","url":null,"abstract":"When a liquid is cooled down to temperatures close to the glass transition, the relaxation dynamics are characterized by two timescales associated with the structural relaxation and a secondary process known as the Johari-Goldstein (JG) or slow β relaxation. The JG relaxation is related to many crucial properties of glasses, such as their plastic response, and is here investigated using fast-scanning calorimetry in high-enthalpy GeSe3 glasses. High-enthalpy states are reached by two methods: (1) increasing the cooling rate used to quench the melt and (2) irradiating the glass with X-rays. Both methods make the JG relaxation visible in the calorimetric traces, where it appears as an exothermic signal at temperatures below the glass transition. The JG relaxation can be associated with mobile regions produced by quenching or defect regions produced by irradiation. These findings strongly support a general connection between the JG relaxation and local defect regions in the glass network and offer a new strategy to control via X-ray irradiation a key feature of the glass transition and, thereby, the related mechanical properties of the glass.","PeriodicalId":520445,"journal":{"name":"Newton ((New York, N.Y.)","volume":"2 3","pages":"None"},"PeriodicalIF":0.0,"publicationDate":"2026-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12953220/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147358382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microscopic mechanism of anyon superconductivity emerging from fractional Chern insulators. 分数阶陈氏绝缘体中任意子超导的微观机制。

Newton ((New York, N.Y.) Pub Date : 2026-03-02 DOI: 10.1016/j.newton.2025.100340

Fabian Pichler, Clemens Kuhlenkamp, Michael Knap, Ashvin Vishwanath

{"title":"Microscopic mechanism of anyon superconductivity emerging from fractional Chern insulators.","authors":"Fabian Pichler, Clemens Kuhlenkamp, Michael Knap, Ashvin Vishwanath","doi":"10.1016/j.newton.2025.100340","DOIUrl":"https://doi.org/10.1016/j.newton.2025.100340","url":null,"abstract":"Fractional quantum Hall (FQH) states and superconductors typically require contrasting conditions, yet recent experiments have observed them in the same device. A natural explanation is that mobile anyons give rise to superconductivity. However, realizing this requires an unusual energy hierarchy that binds minimally charged anyons, a scenario that requires an additional mechanism in a repulsive system. Here, we show that such an energy hierarchy arises naturally in fractional Chern insulators (FCIs) at fillings ν = 2/(4p∓1) when they are driven toward a quantum phase transition into a \"semion crystal\"-a charge density wave (CDW) with semion topological order. Near the transition, Cooper-pair correlations are enhanced, so that a charge-2e superconductor appears with doping. Using tensor network simulations of a repulsive Hubbard-Hofstadter model at ν = 2/3, we demonstrate a transition from an FCI to a robust semion crystal, identifying the semion crystal as a viable competing phase together with conventional CDW and FQH states. Our framework unifies recent approaches to anyon superconductivity, reconciles it with strong repulsion, and provides guidance for flat-band moiré materials such as twisted MoTe2.","PeriodicalId":520445,"journal":{"name":"Newton ((New York, N.Y.)","volume":"2 3","pages":"None"},"PeriodicalIF":0.0,"publicationDate":"2026-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12953221/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147358458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermodynamic limits in far-from-equilibrium molecular templating networks. 非平衡分子模板网络的热力学极限。

Newton ((New York, N.Y.) Pub Date : 2026-01-05 DOI: 10.1016/j.newton.2025.100302

Benjamin Qureshi, Jenny M Poulton, Thomas E Ouldridge

引用次数: 0

A one-transistor organic electrochemical self-sustained oscillator model for neuromorphic networks. 神经形态网络的单晶体管有机电化学自维持振荡器模型。

Newton ((New York, N.Y.) Pub Date : 2025-10-06 DOI: 10.1016/j.newton.2025.100207

Juan Bisquert, Nir Tessler

{"title":"A one-transistor organic electrochemical self-sustained oscillator model for neuromorphic networks.","authors":"Juan Bisquert, Nir Tessler","doi":"10.1016/j.newton.2025.100207","DOIUrl":"10.1016/j.newton.2025.100207","url":null,"abstract":"Organic electrochemical transistors (OECTs) operating in wet biological environments offer new possibilities for neuromorphic biosensors and bioelectronics. This work presents a device physics approach to develop an organic spiking neuron using a single OECT combined with passive RC components. The key condition is that charge carrier mobility decreases with ion concentration in the organic conductor. This leads to a Z-shaped current-voltage response that, when coupled with an external load, produces self-sustained oscillations. We model the system as a nonlinear oscillator described by a set of first-order differential equations, exhibiting a stable limit cycle. Through nonlinear dynamics and bifurcation theory, we construct a two-variable fast/slow model and identify the conditions for a Hopf bifurcation that triggers oscillatory behavior. The system's output can shift between sinusoidal spiking and relaxation oscillations by adjusting the external capacitor. Crucially, this neuron-like behavior is achieved using a single transistor without external amplifiers. This minimalistic design offers a promising pathway toward energy-efficient, low-cost, and biomimetic neuromorphic systems, with strong potential for integration in future bioelectronic devices.","PeriodicalId":520445,"journal":{"name":"Newton ((New York, N.Y.)","volume":"1 8","pages":"None"},"PeriodicalIF":0.0,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12501206/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145254313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Traction and Stress Control Formation and Motion of +1/2 Topological Defects in Epithelial Cell Monolayers. 牵引和应力控制上皮细胞单层+1/2拓扑缺陷的形成和运动。

Newton ((New York, N.Y.) Pub Date : 2025-09-01 DOI: 10.1016/j.newton.2025.100231

Pradip K Bera, Molly McCord, Jun Zhang, Jacob Notbohm

{"title":"Traction and Stress Control Formation and Motion of +1/2 Topological Defects in Epithelial Cell Monolayers.","authors":"Pradip K Bera, Molly McCord, Jun Zhang, Jacob Notbohm","doi":"10.1016/j.newton.2025.100231","DOIUrl":"10.1016/j.newton.2025.100231","url":null,"abstract":"In confluent cell monolayers, patterns of cell forces and motion are systematically altered near topological defects in cell shape. In turn, defects have been proposed to alter cell density, extrusion, and invasion, but it remains unclear how the defects form and how they affect cell forces and motion. Here, we studied +1/2 defects, and, in contrast to prior studies, we observed the concurrent occurrence of both tail-to-head and head-to-tail defect motion in the same cell monolayer. We quantified the cell velocities, the tractions at the cell-substrate interface, and the stresses within the cell layer near +1/2 defects. Results revealed that both traction and stress are sources of activity and dissipation within the epithelial cell monolayer, with the direction of motion of +1/2 defects depending on whether energy is injected by stresses or tractions. Interestingly, patterns of motion, traction, stress, and energy injection near +1/2 defects existed before defect formation, suggesting that defects form as a result of spatially coordinated patterns in cell forces and motion. These findings introduce a new focus, on coordinated patterns of force and motion that lead to defect formation and motion.","PeriodicalId":520445,"journal":{"name":"Newton ((New York, N.Y.)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12416539/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145031459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-Supervised Elimination of Non-Independent Noise in Hyperspectral Imaging. 高光谱成像中非独立噪声的自监督消除。

Newton ((New York, N.Y.) Pub Date : 2025-08-04 Epub Date: 2025-07-24 DOI: 10.1016/j.newton.2025.100195

Guangrui Ding, Chang Liu, Jiaze Yin, Xinyan Teng, Yuying Tan, Hongjian He, Haonan Lin, Lei Tian, Ji-Xin Cheng

{"title":"Self-Supervised Elimination of Non-Independent Noise in Hyperspectral Imaging.","authors":"Guangrui Ding, Chang Liu, Jiaze Yin, Xinyan Teng, Yuying Tan, Hongjian He, Haonan Lin, Lei Tian, Ji-Xin Cheng","doi":"10.1016/j.newton.2025.100195","DOIUrl":"10.1016/j.newton.2025.100195","url":null,"abstract":"Hyperspectral imaging has been widely used for spectral and spatial identification of target molecules, yet often contaminated by sophisticated noise. Current denoising methods generally rely on independent and identically distributed noise statistics, showing corrupted performance for non-independent noise removal. Here, we demonstrate Self-supervised PErmutation Noise2noise Denoising (SPEND), a deep learning denoising architecture tailor-made for removing non-independent noise from a single hyperspectral image stack. We utilize hyperspectral stimulated Raman scattering and mid-infrared photothermal microscopy as the testbeds, where the noise is spatially correlated and spectrally varied. Based on single hyperspectral images, SPEND permutates odd and even spectral frames to generate two stacks with identical noise properties, and uses the pairs for efficient self-supervised noise-to-noise training. SPEND achieved an 8-fold signal-to-noise improvement without having access to the ground truth data. SPEND enabled accurate mapping of low concentration biomolecules in both fingerprint and silent regions, demonstrating its robustness in sophisticated cellular environments.","PeriodicalId":520445,"journal":{"name":"Newton ((New York, N.Y.)","volume":"1 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12345349/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144857369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The role of magnetic dipolar interactions in skyrmion lattices. 磁偶极相互作用在斯基子晶格中的作用。

Newton ((New York, N.Y.) Pub Date : 2025-04-07 DOI: 10.1016/j.newton.2025.100036

Elizabeth M Jefremovas, Kilian Leutner, Miriam G Fischer, Jorge Marqués-Marchán, Thomas B Winkler, Agustina Asenjo, Jairo Sinova, Robert Frömter, Mathias Kläui

{"title":"The role of magnetic dipolar interactions in skyrmion lattices.","authors":"Elizabeth M Jefremovas, Kilian Leutner, Miriam G Fischer, Jorge Marqués-Marchán, Thomas B Winkler, Agustina Asenjo, Jairo Sinova, Robert Frömter, Mathias Kläui","doi":"10.1016/j.newton.2025.100036","DOIUrl":"https://doi.org/10.1016/j.newton.2025.100036","url":null,"abstract":"Magnetic skyrmions are topological two-dimensional (2D) spin textures that can be stabilized at room temperature and low magnetic fields in magnetic multilayer stacks. Besides their envisioned applications in data storage and processing, these 2D quasiparticles constitute an ideal model system to study 2D particle properties. More precisely, the role of inter-particle dipolar interactions in 2D ensembles can be fully captured in skyrmion lattices. We engineer a multilayer stack hosting skyrmion lattices and increase the relevance of the dipolar coupling by increasing the number of repetitions n from <math><mrow><mi>n</mi> <mo>=</mo> <mn>1</mn></mrow> </math> to <math><mrow><mi>n</mi> <mo>=</mo> <mn>30</mn></mrow> </math> . To ascertain the impact on the spin structure, we carry out a series of imaging experiments and find a drastic change of the skyrmion size. We develop an analytical description for the skyrmion radius in the whole multilayer regime, from thin to thick film limits, identifying the key impact of the nucleation process leading to the skyrmion lattice. Our work provides a detailed understanding of the skyrmion-skyrmion interaction, clarifying the role of dipolar interactions as the multilayer stack is expanded in the z direction.","PeriodicalId":520445,"journal":{"name":"Newton ((New York, N.Y.)","volume":"1 2","pages":"None"},"PeriodicalIF":0.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11976062/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144061284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fundamentals and applications of van der Waals magnets in magnon spintronics. 范德华磁体在磁子自旋电子学中的基本原理和应用。

Newton ((New York, N.Y.) Pub Date : 2025-03-03 DOI: 10.1016/j.newton.2025.100018

Samuel Mañas-Valero, Toeno van der Sar, Rembert A Duine, Bart van Wees

引用次数: 0