Physics Letters A最新文献_第10页

Coherent ionization of atomic K-shells by ultrashort electron bunches in thin light-element targets 超短电子束在薄轻元素靶中的原子k壳层相干电离

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-15 Epub Date: 2026-01-07 DOI: 10.1016/j.physleta.2025.131319

S.V. Trofymenko , V.S. Skorobohatov

引用次数: 0

Sum rule for non-adiabatic geometric phases 非绝热几何相的和规则

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-15 Epub Date: 2026-01-08 DOI: 10.1016/j.physleta.2026.131345

Adam Fredriksson, Erik Sjöqvist

引用次数: 0

Magnetic topological phases in the bulk van der Waals crystals EuBi4Te7 and EuSb4Te7 大块范德华晶体EuBi4Te7和EuSb4Te7的磁性拓扑相

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-15 Epub Date: 2026-01-01 DOI: 10.1016/j.physleta.2025.131315

Jia-Yi Lin, Xiao-Bao Yang, Yu-Jun Zhao

{"title":"Magnetic topological phases in the bulk van der Waals crystals EuBi4Te7 and EuSb4Te7","authors":"Jia-Yi Lin, Xiao-Bao Yang, Yu-Jun Zhao","doi":"10.1016/j.physleta.2025.131315","DOIUrl":"10.1016/j.physleta.2025.131315","url":null,"abstract":"<div><div>In the past several years, magnetic topological materials have attracted interests since the exotic physical phenomena unveiled on these platforms. Using first-principles calculations, we predict that two new-type magnetic van der Waals crystals, EuBi<sub>4</sub>Te<sub>7</sub> and EuSb<sub>4</sub>Te<sub>7</sub>, are topologically nontrivial with multiple topological phases in various magnetic configurations. In their magnetic ground states, coexisting antiferromagnetic topological insulator phase and axion insulator phase are identified. Therefore, massless Dirac fermion dispersions appear on the surfaces parallel to the out-of-plane orientation. When magnetized to ferromagnetic states, axion insulator phases protected by parity symmetry survive. Meanwhile, if the spins align along the <em>x</em> direction, they are mirror topological crystalline insulators with massless Dirac cones on their (001) and (010) surfaces. The magnetic easy axes of EuBi<sub>4</sub>Te<sub>7</sub> and EuSb<sub>4</sub>Te<sub>7</sub> are along the in-plane and out-of-plane orientations, respectively. These findings open more opportunities for the research and application of magnetic topological physics and topological quantum phase transitions.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"572 ","pages":"Article 131315"},"PeriodicalIF":2.6,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145904012","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

Three-dimensional ghost-free representations of the Pais-Uhlenbeck model from Tri-Hamiltonians 三汉密尔顿派斯-乌伦贝克模型的三维无鬼表示

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-15 Epub Date: 2026-01-08 DOI: 10.1016/j.physleta.2026.131332

Alexander Felski , Andreas Fring , Bethan Turner

引用次数: 0

Pressure-enhanced high-temperature superconductivity in Li2AuH6: First-principles evidence for optimal Tc near 10 GPa Li2AuH6的压力增强高温超导性：10 GPa附近最佳Tc的第一性原理证据

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-05 Epub Date: 2025-12-27 DOI: 10.1016/j.physleta.2025.131309

Qun Wei , Wenhui Li , Jing Luo , Meiguang Zhang

{"title":"Pressure-enhanced high-temperature superconductivity in Li2AuH6: First-principles evidence for optimal Tc near 10 GPa","authors":"Qun Wei , Wenhui Li , Jing Luo , Meiguang Zhang","doi":"10.1016/j.physleta.2025.131309","DOIUrl":"10.1016/j.physleta.2025.131309","url":null,"abstract":"<div><div>Based on first-principles calculations, the structural, electronic, and superconducting properties of Li<sub>2</sub>AuH<sub>6</sub> under pressures ranging from 0 to 50 GPa were studied. The results reveal that Li<sub>2</sub>AuH<sub>6</sub> remains metallic across the pressure range. Notably, at 10 GPa, the superconducting critical temperature (<em>T</em><sub>c</sub>) increases sharply from 89.5 K to approximately 130.9 K—an increase of approximately 46% relative to ambient pressure. With further pressure increase, hydrogen vibrational modes shift to higher frequencies, leading to a reduction of the electron-phonon coupling. At higher pressures (20–50 GPa), <em>T<sub>c</sub></em> lies between 109 and 117 K, which corresponds to an enhancement of approximately 22–30% relative to the ambient pressure <em>T<sub>c</sub></em>. These findings suggest that hydrogen octahedra with strong electron-phonon coupling phonons act as crucial structural units for BCS-type superconductivity, and that the application of appropriate pressure can substantially increase <em>T</em><sub>c</sub>, offering valuable insights for the design of high-temperature superconductors.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"571 ","pages":"Article 131309"},"PeriodicalIF":2.6,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145847738","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

Anisotropic Heisenberg Su-Schrieffer-Heeger spin chain as a quantum channel 各向异性海森堡苏-施里弗-海格自旋链作为量子通道

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-05 Epub Date: 2025-12-21 DOI: 10.1016/j.physleta.2025.131273

Lautaro Moragues , Diego Sebastián Acosta Coden , Omar Osenda , Alejandro Ferrón

{"title":"Anisotropic Heisenberg Su-Schrieffer-Heeger spin chain as a quantum channel","authors":"Lautaro Moragues , Diego Sebastián Acosta Coden , Omar Osenda , Alejandro Ferrón","doi":"10.1016/j.physleta.2025.131273","DOIUrl":"10.1016/j.physleta.2025.131273","url":null,"abstract":"<div><div>Quantum state transmission in spin chains is a fundamental problem within quantum technologies. The Su-Schrieffer-Heeger (SSH) model, first introduced in the context of polyacetylene, provides a paradigmatic example of a system exhibiting topological and non-topological phases. We explore the transmission of one and two excitations in anisotropic Heisenberg SSH spin chains and analyze the relationship between topological properties and state transfer efficiency. We examine the robustness of quantum state transmission against static disorder in the trivial and topological regimes, exploring how topological protection influences transmission fidelity. We also consider the effect of dipolar interactions, introducing long-range couplings and breaking the conservation of total magnetization. Furthermore, we employ optimal control theory to design driving pulses for state transmission, finding substantial differences between optimizing in the trivial and topological regimes. Our results provide insights about the interplay between topology, disorder, interactions, and control strategies in quantum state transfer.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"571 ","pages":"Article 131273"},"PeriodicalIF":2.6,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145886326","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

Parameter estimation in Müntz-Legendre polynomial approximation for non-instantaneous impulsive stochastic fractional integro-differential equations with fractional Brownian motion 具有分数阶布朗运动的非瞬时脉冲随机分数阶积分微分方程的m<s:1> ntz- legendre多项式近似的参数估计

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-05 Epub Date: 2025-12-24 DOI: 10.1016/j.physleta.2025.131261

Abdullah Abdullah , Mohit Verma , Kottakkaran S. Nisar

引用次数: 0

Information-theoretic analysis of complex eigenmodes across avoided crossings in open microcavities 开放微腔避交复特征模的信息论分析

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-05 Epub Date: 2025-12-27 DOI: 10.1016/j.physleta.2025.131298

Kyu-Won Park , Soojoon Lee , Kabgyun Jeong

{"title":"Information-theoretic analysis of complex eigenmodes across avoided crossings in open microcavities","authors":"Kyu-Won Park , Soojoon Lee , Kabgyun Jeong","doi":"10.1016/j.physleta.2025.131298","DOIUrl":"10.1016/j.physleta.2025.131298","url":null,"abstract":"<div><div>Avoided crossings (ACs) are hallmark signatures of mode interaction in quantum and wave systems. Open microcavities whose resonances are naturally described as quasi-normal modes (QNMs) with complex eigenfrequencies offer a convenient platform to observe how openness and loss reorganize modal structure. We introduce a compact <em>quadrature space</em> framework that represents a complex QNM by probability weights on its real and imaginary quadratures, and we apply Shannon-type measures to these distributions. This representation separates marginal spreading of each quadrature from inter quadrature correlation and is robust to nodal sets and exterior zero amplitude points. Applying the method to AC regions, we find that delocalization is driven not only by broadening of individual quadratures but also by a pronounced increase in internal correlation near at the AC, revealing an internal reorganization of resonant modes in non-Hermitian settings. The approach is broadly transferable to other open resonator platforms and provides a general information-theoretic diagnostic for openness-driven mode interactions.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"571 ","pages":"Article 131298"},"PeriodicalIF":2.6,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145886381","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

Superradiant syntheses via the V-type three-level atoms 通过v型三能级原子的超辐射合成

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-05 Epub Date: 2025-12-30 DOI: 10.1016/j.physleta.2025.131299

Gombojav O. Ariunbold , Tuguldur Begzjav

引用次数: 0

Computational study of the spectral behaviour of different isospectrally patterned lattices 不同等谱图晶格光谱行为的计算研究

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-05 Epub Date: 2025-12-30 DOI: 10.1016/j.physleta.2025.131310

Peter Schmelcher

引用次数: 0