Physical review. E最新文献_第3页

Phenomenological renormalization group in neuronal models near criticality. 近临界神经元模型中的现象学重整化群。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2026-07-01 DOI: 10.1103/3lsz-87dd

Kaio F R Nascimento, Daniel M Castro, Gustavo G Cambrainha, Mauro Copelli

引用次数: 0

Elementary derivation of the dissipation-coherence bound for stochastic oscillators. 随机振子耗散相干界的初等推导。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2026-07-01 DOI: 10.1103/yj2t-frgz

Artemy Kolchinsky

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Universal power-law spectral feature in laser-driven proton acceleration. 激光驱动质子加速中的普遍幂律光谱特征。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2026-07-01 DOI: 10.1103/75cm-kdgn

S Jiang, X F Shen, O Rosmej, S P Zhu, X T He, A Pukhov, B Qiao

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Nonequilibrium pathways between cluster morphologies in active phase separation: Necking, rupture, and cavitation. 活性相分离中团簇形态之间的非平衡途径：颈缩、破裂和空化。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2026-07-01 DOI: 10.1103/vdps-lhr9

Liheng Yao, Michael E Cates, Robert L Jack

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Hydrodynamic singularities mimic criticality in dewetting polymer films. 水动力奇点模拟脱湿聚合物薄膜的临界。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2026-07-01 DOI: 10.1103/9frw-h4j6

Rohit V Menon, Mithun Madhusudanan, Mithun Chowdhury

{"title":"Hydrodynamic singularities mimic criticality in dewetting polymer films.","authors":"Rohit V Menon, Mithun Madhusudanan, Mithun Chowdhury","doi":"10.1103/9frw-h4j6","DOIUrl":"https://doi.org/10.1103/9frw-h4j6","url":null,"abstract":"Dewetting of polymer thin films on nonwettable substrates culminates in a late-stage morphological transition in which a connected fibrillar network fragments into isolated droplets. Because this transformation resembles a depercolation process, it raises the question of whether the network-droplet transition represents a genuine critical phenomenon. We address this question by defining a connectivity-based order parameter and analyzing spatial correlations of the evolving morphology. Although the order parameter exhibits a sharp decrease suggestive of critical behavior, the correlation length of the polymer-rich phase remains finite, evolves through irregular fluctuations, and shows no divergence near the transition. We explain this by noting that the length scales at which the Plateau-Rayleigh instabilities act are much smaller than the large-scale correlations encapsulated in the structure's correlation length. In addition, nondimensionalized order-parameter curves measured at different observation scales fail to collapse onto a universal master curve. These results demonstrate that the breakup of the fibrillar network is governed by localized Plateau-Rayleigh rupture events rather than system-spanning cooperative dynamics. The late-stage transition in dewetting films therefore mimics a hydrodynamic singularity-driven pseudocritical crossover rather than a true critical transition.","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"114 1","pages":"L013402"},"PeriodicalIF":2.4,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148796783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Neural optimization of the most probable paths of three-dimensional active Brownian particles. 三维活跃布朗粒子最可能路径的神经优化。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2026-07-01 DOI: 10.1103/ys1b-1lrd

Bin Zheng, Zhongqiang Xiong, Changhao Li, Zhanglin Hou, Ziluo Zhang, Xinpeng Xu, Li-Shing Lin, Kenta Ishimoto, Kento Yasuda, Shigeyuki Komura

引用次数: 0

Restoring detailed balance in non-Hermitian Markov processes. 恢复非厄米马尔可夫过程的详细平衡。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2026-07-01 DOI: 10.1103/qc1n-w5tg

Tim Van Wesemael, Gilberto Nakamura, Jan Baetens, Odemir M Bruno, Alexandre S Martinez, Christophe Deroulers

引用次数: 0

Avalanches of a granular medium reinforced with flexible fibers. 用柔性纤维增强的粒状介质的雪崩。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2026-07-01 DOI: 10.1103/yk6m-tpsx

Ladislas Wierzchalek, Georges Gauthier, Baptiste Darbois Texier

{"title":"Avalanches of a granular medium reinforced with flexible fibers.","authors":"Ladislas Wierzchalek, Georges Gauthier, Baptiste Darbois Texier","doi":"10.1103/yk6m-tpsx","DOIUrl":"https://doi.org/10.1103/yk6m-tpsx","url":null,"abstract":"The addition of a small fraction of flexible fibers to a granular medium is known to enhance the bulk mechanical strength of the material. However, their effect on the free-surface flow of grains remains largely unexplored. To address this gap, we investigate the influence of flexible fibers on dry granular avalanches. Using a drum partially filled with a grain-fiber mixture and rotated at low speeds, we observed successive avalanches and analyzed their dynamics. Specifically, we examined the effects of fiber volume fraction and fiber length on both the statistical properties and the individual dynamics of avalanches. Our results show that the average starting and stopping angles increase with fiber volume fraction, demonstrating that the addition of fibers stabilizes the granular slope. Fiber length is found to have only a minor influence on slope stabilization, i.e., on the increase in avalanche angles induced by fibers. While the increase in avalanche angles aligns with the bulk rheology of grain-fiber mixtures, the role of fiber length appears different in the case of free-surface flows. Increasing the fiber volume fraction also alters the distribution of avalanche angles, leading to a broader distribution and a higher probability of small-amplitude avalanches. Analysis of individual avalanche dynamics further reveals that fibers affect avalanche duration, suggesting enhanced energy dissipation within the system. To capture these effects, we propose a theoretical model that links avalanche dynamics to the rheological properties of the material. This framework provides an estimate of how fibers influence the inertial term in the rheology of grain-fiber mixtures, thereby extending existing empirical formulations for their behavior.","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"114 1-2","pages":"015414"},"PeriodicalIF":2.4,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148796894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamics of particle lane formation in confined viscoelastic fluids under shear. 剪切作用下粘弹性受限流体中颗粒通道形成动力学。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2026-07-01 DOI: 10.1103/cm4c-m7lw

Hiroto Yokoyama, Masanori Honda, Rinya Miyakawa, Yuki Shinohara, Kota Nakamura, Kojiro Otoguro, Kiwamu Yoshii, Yutaka Sumino

{"title":"Dynamics of particle lane formation in confined viscoelastic fluids under shear.","authors":"Hiroto Yokoyama, Masanori Honda, Rinya Miyakawa, Yuki Shinohara, Kota Nakamura, Kojiro Otoguro, Kiwamu Yoshii, Yutaka Sumino","doi":"10.1103/cm4c-m7lw","DOIUrl":"https://doi.org/10.1103/cm4c-m7lw","url":null,"abstract":"Simple shear flow can induce flow-aligned chain formation of particles suspended in viscoelastic fluids. Although this phenomenon has been reported for decades, direct in situ measurements of the alignment dynamics and particle trajectories during chain formation remain limited. Here, we develop an in situ observation platform based on a parallel-plate geometry with a fixed top plate and a rotating bottom plate, separated by a gap comparable to the particle diameter, enabling simultaneous observation of particle alignment under radially varying shear rates. The narrow gap strongly confines particle motion, thereby enhancing hydrodynamic interactions and collision events between particles. Using a viscoelastic fluid embedding zircon particles as the sample, we find that alignment occurs once the local particle Weissenberg number exceeds unity (Wi_{p}≥1), defined using an effective shear rate based on the wall velocity and the available gap width. Particle tracking further reveals an intermittent back-and-forth motion along the flow direction, observed in a reference frame corotating at half the angular velocity of the bottom plate, where the fluid velocity vanishes at the channel midplane. This motion arises from switching between two stable particle heights and is hereafter referred to as \"shuttling,\" which we define explicitly to avoid ambiguity. Using the image brightness in a dyed fluid as a proxy for out-of-plane position, we demonstrate that this shuttling motion originates from vertical displacement of the particles. We further construct a minimal agent-based model in which the particle height follows a Ginzburg-Landau-type double-well potential, and show that collision-driven accumulation emerges in simulations. In the strongly confined geometry, alignment occurs via an effective attraction induced by collisions, which is qualitatively reminiscent of clustering phenomena in active matter.","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"114 1-2","pages":"015422"},"PeriodicalIF":2.4,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148796905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tunable bands in one-dimensional fractional quantum media. 一维分数量子介质中的可调谐带。

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2026-07-01 DOI: 10.1103/yrtd-m3tt

Brenden R Guyette, Joshua M Lewis, Lincoln D Carr

{"title":"Tunable bands in one-dimensional fractional quantum media.","authors":"Brenden R Guyette, Joshua M Lewis, Lincoln D Carr","doi":"10.1103/yrtd-m3tt","DOIUrl":"https://doi.org/10.1103/yrtd-m3tt","url":null,"abstract":"Fractional calculus has become an essential framework in geophysics, optics, and biological systems to capture long-range correlations and anomalous transport. In this article, we extend the success of fractional calculus in physical models to explore a particle in a periodic potential, where the Schrödinger equation is extended to its fractional form. This framework enables us to study how the Lévy index q governs the formation and inversion of energy bands, offering a pathway to engineer new physical behaviors and device functionalities by tuning q in periodic quantum systems. We solve the fractional Schrödinger equation for periodic rectangular potentials of varying height V_{0}, barrier thickness L, and well width W using an imaginary-time evolution algorithm, and supplement the discrete energy dispersion through Gaussian process regression. This analysis reveals a qualitative shift in the system's band structure at q=2, separating into distinct regimes of dispersion that define behavior for q>2 and q<2. For q>2, the energy bands undergo an inverting transformation as symmetric minima emerge within the first Brillouin zone and shift from k=0 toward k=±π/a with increasing q. These degenerate minima define a Bloch-momentum qubit, suggesting an analog to valley degrees of freedom used in valleytronics. The q at which the inversion completes scales as q∝V_{0}^{-0.28±0.05}, q∝L^{-0.35±0.08}, and q∝W^{-0.49±0.06} when varying potential parameters individually, indicating a tunable transformation sensitivity to potential geometry. In contrast, for q<2, the ground band hardens around k=0, with a dispersion following the functional form of C|k|^{q}+E_{0} near k=0. This suggests an effective mass of 0 for 1<q<2 at the band's lowest energy state. These results demonstrate that the Lévy index serves as a tunable degree of freedom in quantum periodic systems, capable of driving band inversion, modulating the band gap, and reshaping carrier dynamics through effective-mass control.","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":"114 1-1","pages":"014106"},"PeriodicalIF":2.4,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148796912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0