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Phase-mixing of dust ion acoustic waves in plasmas
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-02-17 DOI: 10.1016/j.physleta.2025.130355
Anubhab Biswas , Chandan Maity , Sourav Pramanik
{"title":"Phase-mixing of dust ion acoustic waves in plasmas","authors":"Anubhab Biswas ,&nbsp;Chandan Maity ,&nbsp;Sourav Pramanik","doi":"10.1016/j.physleta.2025.130355","DOIUrl":"10.1016/j.physleta.2025.130355","url":null,"abstract":"<div><div>We study the spatio-temporal evolution of low frequency dust ion acoustic waves (DIAWs) in collisionless plasmas containing hot Boltzmann-distributed electrons, cold inertial ions and cold negatively charged dust grains, taking the mobility of the dust grains into account. Our study reveals that DIAWs undergo phase-mixing for arbitrarily small initial amplitudes, causing them to suffer a gradual loss in wave coherency. A perturbative analysis of the governing equations leads us to conclude that the phase-mixing of DIAWs occur solely because of the dynamics of the dust grains. An estimate of the phase-mixing time is also obtained. It is observed to be greatly influenced by the values of certain plasma parameters, such as the dust density, the temperature of the electrons and the mass of the dust grains. We expect that the results of this investigation will be of relevance in laboratory as well as astrophysical plasma environments.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"538 ","pages":"Article 130355"},"PeriodicalIF":2.3,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427912","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
Sound transmission loss overlay mechanism of plate-type acoustic metamaterials with Helmholtz resonators
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-02-14 DOI: 10.1016/j.physleta.2025.130358
Ren-Sheng Li , Xiao-Wei Sun , Xing-Lin Gao , Gang-Gang Xu , Ting Song , Jun-Hong Tian
{"title":"Sound transmission loss overlay mechanism of plate-type acoustic metamaterials with Helmholtz resonators","authors":"Ren-Sheng Li ,&nbsp;Xiao-Wei Sun ,&nbsp;Xing-Lin Gao ,&nbsp;Gang-Gang Xu ,&nbsp;Ting Song ,&nbsp;Jun-Hong Tian","doi":"10.1016/j.physleta.2025.130358","DOIUrl":"10.1016/j.physleta.2025.130358","url":null,"abstract":"<div><div>Introducing the acoustic resonator can generate an attenuation peak without degradation of the sound insulation. To reveal the mechanism of the sound transmission loss overlay, a plate-type acoustic metamaterial with Helmholtz resonators as attached masses is presented. The underlying physics is analyzed from the perspective of effective mass derived by a semi-analytical method. It is attributed to the multiplicative relationship of the effective mass. By tuning the Helmholtz resonance frequency to the vicinity of the resonance, numerical and experimental results show that an additional peak can appear at the transmission loss dip generated by the attached mass.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"538 ","pages":"Article 130358"},"PeriodicalIF":2.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427915","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
Enhancement and concealment of broadband acoustic transmission through the coupling of monopole resonances in meta-structures
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-02-14 DOI: 10.1016/j.physleta.2025.130349
Yunzhong Lei, Jiu Hui Wu, Tengyue Zheng, Shaokun Yang
{"title":"Enhancement and concealment of broadband acoustic transmission through the coupling of monopole resonances in meta-structures","authors":"Yunzhong Lei,&nbsp;Jiu Hui Wu,&nbsp;Tengyue Zheng,&nbsp;Shaokun Yang","doi":"10.1016/j.physleta.2025.130349","DOIUrl":"10.1016/j.physleta.2025.130349","url":null,"abstract":"<div><div>Broadband acoustic transmission enhancement is crucial in practical applications. Here, we propose a meta-structure composed of a central cavity, a middle cavity, eight zigzag channels and eight straight channels, which can improve the acoustic emission and reception efficiency in the broadband range by coupling the first and second monopole resonances, respectively. An acoustic transmission system is constructed by placing the meta-structures at the emitting and receiving end. After parameter optimization, simulation and experiments show that the system achieves an efficiently enhanced broadband acoustic transmission through the cascade process of broadband emission and reception enhancement with a maximum sound pressure level (SPL) gain of 36.5 dB and a -3 dB bandwidth of 797Hz-1187Hz. Furthermore, while maintaining the same SPL at the receiving end, the system can reduce the SPL in other areas by 20 dB to achieve acoustic concealed transmission. The proposed system shows significant potential in acoustic communication.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"538 ","pages":"Article 130349"},"PeriodicalIF":2.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427914","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
Acoustic higher-order topological corner states in a low-symmetry Lieb lattice
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-02-13 DOI: 10.1016/j.physleta.2025.130354
Xianfeng Man , Shengjie Zheng , Zhongjian Pan , Kun Li , Xingfa Yang , Jian Li , Ning Chen , Gaofeng Zhang , Baizhan Xia
{"title":"Acoustic higher-order topological corner states in a low-symmetry Lieb lattice","authors":"Xianfeng Man ,&nbsp;Shengjie Zheng ,&nbsp;Zhongjian Pan ,&nbsp;Kun Li ,&nbsp;Xingfa Yang ,&nbsp;Jian Li ,&nbsp;Ning Chen ,&nbsp;Gaofeng Zhang ,&nbsp;Baizhan Xia","doi":"10.1016/j.physleta.2025.130354","DOIUrl":"10.1016/j.physleta.2025.130354","url":null,"abstract":"<div><div>Among the various two-dimensional Bravais lattices, Lieb lattice systems exhibit unique physics regarding the coexistence of flat bands and Dirac bands, with the flat bands positioned in the middle of them, and have been extensively studied. As a low-symmetry lattice, the formation of the flat band in the Lieb lattice is attributed to the destructive interference of Bloch wave functions caused by lattice symmetry. However, the higher-order topological properties of the Lieb lattice have been insufficiently investigated in the field of acoustics. In this work, we design a two-dimensional topological acoustic system by rationally arranging resonators of acoustic metamaterials in a Lieb lattice. The presence of topologically protected flat bands, first-order edge states, and zero-dimensional corner states in the Lieb lattice is observed on simulations. Subsequently, numerical and experimental observations reveal a flat band capable of forming localized bulk states, with corner states distinctly separated from them. Notably, corner states are localized not only in the corner but also in the independent resonator with “pointy” edges. Furthermore, the topological states of Lieb lattice and their number are related to their three types of polymers from a structural perspective. The proposed work presents an experimentally viable framework for investigating topologically protected flat bands and the high-order topological insulator within the context of the Lieb lattice.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"538 ","pages":"Article 130354"},"PeriodicalIF":2.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420430","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
Impact of Tolman-Kuchowicz metric potentials on cracking and overturning
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-02-13 DOI: 10.1016/j.physleta.2025.130324
Adnan Malik , Attiya Shafaq , M. Farasat Shamir , Fatemah Mofarreh
{"title":"Impact of Tolman-Kuchowicz metric potentials on cracking and overturning","authors":"Adnan Malik ,&nbsp;Attiya Shafaq ,&nbsp;M. Farasat Shamir ,&nbsp;Fatemah Mofarreh","doi":"10.1016/j.physleta.2025.130324","DOIUrl":"10.1016/j.physleta.2025.130324","url":null,"abstract":"<div><div>The purpose of this paper is to present the detailed analysis of the cracking/overturning technique to provide an extended perspective to comprehend how local density perturbations influence the stability of stellar structures exhibiting spherical symmetry within the Rastall gravity framework. For our current analysis, we analyze an anisotropic configuration governed by the barotropic equation of state and formulate the field equations. Following this, we incorporate the non-conservation of energy momentum tensor and derive the Tolman-Oppenheimer-Volkof equation. Further, we incorporate Tolman-Kuchowicz spacetime in our study and obtain the expression for radial forces to examine the occurrence of overturning and cracking by inducing disruptions to the configuration using local density perturbations. To verify the viability of this approach, we implement it to ten distinct stellar objects i.e., Her X-1, 4U 1538-52, SAX J1808.4-3658, PSR J1614-2230, SMC X-1, Cen X-3, Vela X-1, PSR J1903+0327, EXO 1785-248, and LMC X-4, revealing that each star undergoes overturning and cracking within the configuration. Conclusively, this work highlights the importance of utilizing the suggested cracking technique for stability analysis in compact objects.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"538 ","pages":"Article 130324"},"PeriodicalIF":2.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420432","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
Third-order and quartic dispersions inducing Airy pulse regeneration in optical fiber links
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-02-13 DOI: 10.1016/j.physleta.2025.130352
Lucien Mandeng Mandeng , Clément Tchawoua
{"title":"Third-order and quartic dispersions inducing Airy pulse regeneration in optical fiber links","authors":"Lucien Mandeng Mandeng ,&nbsp;Clément Tchawoua","doi":"10.1016/j.physleta.2025.130352","DOIUrl":"10.1016/j.physleta.2025.130352","url":null,"abstract":"<div><div>We report the regeneration of truncated Airy pulses using the asymmetric inversion phenomenon obtained exclusively with the interaction between the third-order dispersion (TOD) and the fourth-order dispersion (FOD). Such regeneration shows a succession of alternating hysteresis cycle shapes (HCSs) and reversed HCSs. The weakness of the dispersion of the medium makes it possible, compared to other pre-existing regeneration techniques, to obtain significantly greater maximum signal intensities in the focal area (FA) regions. Starting with an asymmetric inversion phenomenon in anomalous FOD is found to be the best method unlike the case of starting in normal FOD which achieves the worst case of regeneration in agreement with the results obtained in other techniques. Increasing the nonlinearity is deleterious for the regeneration so for more realistic conditions, it is rather required to operate with a weakly nonlinear transmission line at low value of the anomalous FOD.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"538 ","pages":"Article 130352"},"PeriodicalIF":2.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427916","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
Perspectives on the use of magnetic materials for environmental remediation: A mini review
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-02-13 DOI: 10.1016/j.physleta.2025.130341
Kristen Stojak Repa
{"title":"Perspectives on the use of magnetic materials for environmental remediation: A mini review","authors":"Kristen Stojak Repa","doi":"10.1016/j.physleta.2025.130341","DOIUrl":"10.1016/j.physleta.2025.130341","url":null,"abstract":"<div><div>Over the past several decades several contaminants, such as heavy metals, pharmaceuticals, microplastics, dyes, sunscreens, and other byproducts of industrial applications leech into the environment in a variety of ways. There are many methods of removal, but one of the most promising is via magnetic separation, whereby the contaminant and magnetic materials are connected to each other and then removed via external magnetic field. This method of removal tends to be relatively inexpensive, straightforward, and highly adaptable. Furthermore, many of the candidate materials involve iron oxides, which are generally environmentally friendly. This perspective aims to provide a brief overview of recent history with regard to magnetic materials for environmental remediation.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"539 ","pages":"Article 130341"},"PeriodicalIF":2.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428899","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
Emergence of Stokes vortices from partially coherent edge dislocation beam propagating in turbulent atmosphere
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-02-13 DOI: 10.1016/j.physleta.2025.130353
Haitao Chen , Zenghui Gao
{"title":"Emergence of Stokes vortices from partially coherent edge dislocation beam propagating in turbulent atmosphere","authors":"Haitao Chen ,&nbsp;Zenghui Gao","doi":"10.1016/j.physleta.2025.130353","DOIUrl":"10.1016/j.physleta.2025.130353","url":null,"abstract":"<div><div>The theoretical expression of the Gaussian Schell-model (GSM) edge dislocation beam propagating in atmosphere has been deduced, which is employed to discuss the emergence and evolution of Stokes vortices from the host beam. It is shown that Stokes vortices appear as the beam propagates in atmospheric turbulence. The variation both in positions and the degrees of polarization of the Stokes vortices may occur with propagation of the beam. The pairs of <em>S</em><sub>12</sub> Stokes vortices, <em>S</em><sub>23</sub> Stokes vortices or <em>S</em><sub>31</sub> Stokes vortices with opposite charge may create or annihilate with change of propagation distance or initial beam parameters, for instance, the slope and the off-axis parameter of the edge dislocation, or the transversal correlation length of the beam.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"538 ","pages":"Article 130353"},"PeriodicalIF":2.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420431","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
Structural phase transition and physical properties in NaBr under high pressure
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-02-12 DOI: 10.1016/j.physleta.2025.130351
Wenming Qi , Wei Xu , Hadiqam Abdugopur , Guihua Lu , Lai Wei , Peng Li , Min Gao
{"title":"Structural phase transition and physical properties in NaBr under high pressure","authors":"Wenming Qi ,&nbsp;Wei Xu ,&nbsp;Hadiqam Abdugopur ,&nbsp;Guihua Lu ,&nbsp;Lai Wei ,&nbsp;Peng Li ,&nbsp;Min Gao","doi":"10.1016/j.physleta.2025.130351","DOIUrl":"10.1016/j.physleta.2025.130351","url":null,"abstract":"<div><div>The simple cubic structure and highly ionic bonding characteristics of Alkali halide NaBr have garnered significant attention in the field of fundamental physics. Previous X-ray diffraction studies revealed a phase transition from B1 to B33 phase in NaBr under pressure. However, the experimental determination of the phase transition pressure suffered from large errors due to the absence of a pressure transfer medium and high-water absorption in NaBr samples. To overcome these limitations, we employ DFT calculations to investigate the phase transition behavior of NaBr up to 40 GPa. Our theoretical analysis reveals a “first-order” phase transition at 25 GPa and provides comprehensive insights into the pressure-dependent physical properties.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"538 ","pages":"Article 130351"},"PeriodicalIF":2.3,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427913","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
Numerical study of stable and unstable canards in a slow–fast hard-type van der Pol oscillator
IF 2.3 3区 物理与天体物理
Physics Letters A Pub Date : 2025-02-11 DOI: 10.1016/j.physleta.2025.130347
Munehisa Sekikawa , Naohiko Inaba
{"title":"Numerical study of stable and unstable canards in a slow–fast hard-type van der Pol oscillator","authors":"Munehisa Sekikawa ,&nbsp;Naohiko Inaba","doi":"10.1016/j.physleta.2025.130347","DOIUrl":"10.1016/j.physleta.2025.130347","url":null,"abstract":"<div><div>This Letter investigates the canards generated by a slow–fast hard-type van der Pol oscillator numerically. “Hard-type” oscillators are those that can simultaneously exhibit a stable equilibrium, a stable relaxation oscillation, and an unstable limit cycle; the possibility of this coexistence is due to the structure of the oscillator that contains a nonlinear element characterized by a fifth-order polynomial. In this Letter, we create a two-parameter bifurcation diagram in which both supercritical and subcritical Andronov–Hopf bifurcations and canard explosions are confirmed. We observe that the stable canard in this oscillator exhibits two explosion events. Furthermore, the oscillator exhibits an unstable canard, which also exhibits an explosion. These stable and unstable canards transform into large oscillations and disappear via a saddle-node bifurcation. We note that both the two sequential canard explosions as well as the unstable canard observed here represent novel phenomena that have not been observed prior to this work.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"538 ","pages":"Article 130347"},"PeriodicalIF":2.3,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420429","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
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