Results in Physics最新文献

{"title":"Nonreciprocal transmission, reflection, and absorption in non-Hermitian cavity magnonics","authors":"","doi":"10.1016/j.rinp.2024.107915","DOIUrl":"10.1016/j.rinp.2024.107915","url":null,"abstract":"<div><p>Nonreciprocal transmission, reflection and absorption are very important in quantum science. For their realization, cavity magnonics is attracting much attention, where Kittel mode describing collective excitations of a large number of spins is excited through driving magnons with a strong microwave field. The cavity photons and magnons are coupled via magnetic dipole interaction, while the magnons and phonons are coupled via magnetostrictive interaction. By applying experimental feasible parameters, we breaks the symmetry of spatial inversion in order to realize nonreciprocal transmission, reflection absorption. Our results reveal a new strategy to protect quantum resources for building noise-tolerant quantum processors, realizing chiral networks, and invisible quantum sensing.</p></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2211379724006004/pdfft?md5=bafd4b8d8b15cd30993d8d11bbcb656c&pid=1-s2.0-S2211379724006004-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141953922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Third-order natural Non-Hermitian quantization of quad-photon Rabi oscillation in an atomic ensemble","authors":"","doi":"10.1016/j.rinp.2024.107900","DOIUrl":"10.1016/j.rinp.2024.107900","url":null,"abstract":"<div><p>A natural non– Hermitian system is constructed based on ⁸⁵Rb atoms and multi-dressing fields. On this basis, the influence of different dressing fields on symmetry breaking and energy level degeneracy during four-photon spontaneous eight-wave mixing based on seventh-order nonlinear effects is investigated, and four-photon correlations are analyzed. When the dressing Rabi frequency dominates, the real part splits, leading to in phase constructive dressing, its symmetry breaking is localized, non-degenerate, Abelian and has low symmetry. When the dephase rate dominates, the imaginary part splits, leading to out-of-phase destructive dressing, its symmetry breaking is nonlocal, degenerate, non– Abelian and highly symmetric. The interactions between the dressing fields and the eigenvalue splitting modes of two double dressing effects that have third-order EPs are compared, and the role of the internal and external dressing fields in the formation of third-order EPs is clarified. The third-order non-Hermitian interaction between two dressing fields of the nested scheme is strongest and weakest for the parallel scheme, with the cascade scheme intermediate between them. This study is of value for the detection and quantum storage of quantum states.</p></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2211379724005850/pdfft?md5=577c2fe535f0f9a9cd3ed272652fa063&pid=1-s2.0-S2211379724005850-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141978138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of the electromagnetic field generated by a magnetic pendulum","authors":"","doi":"10.1016/j.rinp.2024.107914","DOIUrl":"10.1016/j.rinp.2024.107914","url":null,"abstract":"<div><p>In this paper the electromagnetic (EM) field expressions for a magnetic pendulum are derived. The mechanical frequency and the magnetic dipole moment are found by applying mechanical-kinetic theory. A study of the expressions reveals that the electromagnetic field contains both the fundamental and higher order harmonic waves, which is quite different from a magnet with simple harmonic motion, and their amplitude ratios are governed by Bessel Functions of the first kind. 1 Hz radiator system is used for the experimental verification. The radiation pattern, the efficiency and the <em>Q</em> factor of the pendulum are discussed in detail. This paper provide the theoretical basis with the experimental verification of the pendulum antenna.</p></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2211379724005990/pdfft?md5=676cb752a323da49e460d19059370128&pid=1-s2.0-S2211379724005990-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141978570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetism in 2- and 6-line ferrihydrite nanoparticles","authors":"","doi":"10.1016/j.rinp.2024.107916","DOIUrl":"10.1016/j.rinp.2024.107916","url":null,"abstract":"<div><p>Magnetic properties of 2- and 6-line ferrihydrite (2LFh and 6LFh, respectively) as well as 2-line ferrihydrite embedded in SiO₂ (2LFh/SiO₂) in the temperature range 2–380 K are investigated using DC magnetization and AC magnetic susceptibility measurements. All the samples exhibit superparamagnetic (SPM) responses at temperatures above their respective blocking temperatures in the range T_B = 36–50 K. Linear extrapolations of 1/χ’ vs. T at 80 Hz and high temperatures give effective magnetic moment per atom μ_eff = 5.78 μ_B for 2LFh, μ_eff = 6.27 μ_B for 2LLFh/SiO₂ and μ_eff = 5.20 μ_B for 6LFh using Curie-Weiss law. The Arrhenius plots give anisotropy constants K = 4.5 × 10⁵ J/m³ for 2LFh, K = 5.5 × 10⁵ J/m³ and K = 1.5 × 10⁵ J/m³ for 6LFh using the particles size of 40, 35 and 60 Å derived from TEM data on the same samples. The number of uncompensated moments at the surfaces which contribute to the overall magnetic moments of the particles were estimated from the Néel model for antiferromagnetic nanoparticles and yielded magnetic moment per particle μ_p ∼ 283 μ_B, 251μ_B and 465 μ_B for 2LFh, 2LFh/SiO₂ and 6LFh, respectively. At 10 K, well thin the magnetic regime, the spins are blocked in specific directions resulting in usually large M_S which appears to increase with decreasing nanoparticle size. Demagnetization behaviors were used as fingerprint techniques to identify the magnetic ordering and the nature of the interactions within the samples, they confirm the existence of AFM core at temperature below T_B superimposed to a ferrimagnetic-like shell (at the surface). IRM/TRM measurements, particularly the TRM characteristic peaks at specific fields ranging from H = 10–40 kOe confirmed the existence of a spin-glass state below T_B in the samples.</p></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2211379724006016/pdfft?md5=8fa763c9c6f5dea404da0d079c19854f&pid=1-s2.0-S2211379724006016-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142020634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic properties and chaotic behaviors of pure-cubic complex Ginzburg–Landau equation with different nonlinearities","authors":"","doi":"10.1016/j.rinp.2024.107913","DOIUrl":"10.1016/j.rinp.2024.107913","url":null,"abstract":"<div><p>This paper investigates the pure-cubic complex Ginzburg–Landau equation (PC-CGLE) with different nonlinearities such as Kerr law, power law and so on. We get the dynamic systems and show that solitons and periodic solutions exist through the complete discrimination system for the polynomial method (CDSPM). To verify these conclusions, we construct the traveling wave solution via the CDSPM, and some new solutions are also built. The soliton stability and modulation instability with two types of nonlinearities are discussed. Finally, by adding perturbed terms to the dynamic system, we obtain the largest Lyapunov exponents and the phase diagrams of the equation, which proves there are chaotic behaviors in PC-CGLE. The results such as Gaussian soliton solutions and chaotic behavior for PC-CGLE are initially discovered in the present paper.</p></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2211379724005989/pdfft?md5=231e86f8bbab54489fc927ded356bef6&pid=1-s2.0-S2211379724005989-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141993899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Note on quantum discord","authors":"","doi":"10.1016/j.rinp.2024.107905","DOIUrl":"10.1016/j.rinp.2024.107905","url":null,"abstract":"<div><p>Quantum discord goes beyond entanglement and exists in a wide range of quantum states that may be separable, playing a crucial role in quantum information tasks. In this paper, we firstly proposed a zero-discord criterion for two-qubit system based on the partial transposition of density matrix, and then extended it to the qubit–qudit system. By detailed examples we demonstrate the effectiveness of these criteria in detecting discord. Moreover, we provide an analytical lower bound of geometric quantum discord(GQD) using eigenvalue vectors of density matrix. Finally, we presented a one-way work deficit lower bound based on our lower bound of GQD.</p></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2211379724005904/pdfft?md5=6a1193c6646f262991cd20c06a969286&pid=1-s2.0-S2211379724005904-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141953920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tuning effect and switching behavior of sunlight field on lateral photovoltaic effect of Zn0.95Cu0.05O/p-Si heterojunction","authors":"","doi":"10.1016/j.rinp.2024.107906","DOIUrl":"10.1016/j.rinp.2024.107906","url":null,"abstract":"<div><p>In this paper, the Zn_0.95Cu_0.05O/p-Si heterojunction with lateral photovoltaic effect (LPE) is prepared that has the tuning effect and switching behavior of sunlight field. The dependence of the lateral photovoltage (<em>LPV</em>) on the laser position shows high sensitivity (20 mV mm⁻¹) and strict linearity. Interestingly, the LPV eventually decreased to 0 mV as the sunlight intensity increased to 48 mW, under the constant laser intensity and position, indicating the application potential of a photo-switch. This light field effect results from the irradiation of sunlight, which changes the position of quasi-Fermi level, reduces the drive power for carriers by the space charge region in the heterojunction, and increases the concentration of carriers resulting in increased the scattering between carriers to decrease the lifetime of carriers produced by the laser. This work can expand the application of LPE in the field of multifunctional devices such as photo-switches, position sensors and self-powered devices.</p></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2211379724005916/pdfft?md5=cbaeca5cdcdcdff9fafd1b833076e617&pid=1-s2.0-S2211379724005916-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141948329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Totally asymmetric simple exclusion process on a dynamic lattice with local inhomogeneity","authors":"","doi":"10.1016/j.rinp.2024.107904","DOIUrl":"10.1016/j.rinp.2024.107904","url":null,"abstract":"<div><p>In this manuscript, we introduce a totally asymmetric simple exclusion process on a dynamic lattice with inhomogeneity to model motor-based long-range transport along microtubules (MTs) which exhibit cycles of growth, shortening and regrowth at their growing tips. By mean-field approximation and numerical simulations, we explore phase diagrams for the particle density near the dynamic end of the lattice as well as over the entire lattice. In particular, we find seven different phases for the density over the entire lattice and explore the corresponding phase diagram by analytical analysis. Interestingly, we find that the density may have a linear profile in part of the lattice. When the lattice has a defect, we separate the lattice into two subsystems: a right subsystem with fixed length and a defect in the middle and a left subsystem with dynamic length. When the right subsystem is in maximum-current phase, we calculate an analytical approximation of the density away from the boundaries and the defect site and the density is in association with the reduced hopping rate at the defect site; the density at the left side of the defect site serves as the effective entry rate of the left subsystem. We find that with defects, the linear profiles no longer appear at the left end of the left subsystem and only five possible phases could occur. This is a step-forward to a more comprehensive mathematical description of intracellular long-range transport of organelles along MTs with instability.</p></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2211379724005898/pdfft?md5=1d501b878e22a3418693f3b8c0543156&pid=1-s2.0-S2211379724005898-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141984730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modulation of optical nonlinearity of silver nanoparticles by 2D ZnO nanoflakes","authors":"","doi":"10.1016/j.rinp.2024.107889","DOIUrl":"10.1016/j.rinp.2024.107889","url":null,"abstract":"<div><p>In this study, we investigated the size- and shape-dependent optical nonlinearity of silver nanoparticles (AgNPs), and their modulation upon mixing with 2D ZnO nanoflakes (ZnONFs) using a Z-scan technique powered by a continuous-wave 514.5 nm Ar-ion laser source. We prepared three batches of AgNPs with varying average particle sizes of 36 nm, 64 nm, and 81 nm and one batch of ZnONFs, by employing chemical reduction and hydrothermal preparation protocols, respectively. Our experimental results revealed a decrease in the values of the nonlinear refractive index of AgNPs with an increase in their average sizes. It appeared that variation in the shape of the AgNPs does not have any appreciable impact on the optical nonlinearity. The value of the nonlinear refractive index of AgNPs amplified significantly upon mixing with ZnONFs. Interestingly, the magnitude of the enhancement of the nonlinear refractive index of AgNPs was found to be dependent on the proportion of both ZnONFs and AgNPs in the mixture. We could harvest ∼ 4 times larger magnitude of the nonlinear refractive index of AgNPs, by mixing 40 % of AgNPs with the lowest average particle size with 60 % of ZnONFs.</p></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2211379724005746/pdfft?md5=c280614b07cc979900c7d6a4373e62b7&pid=1-s2.0-S2211379724005746-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141964638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the path of spin-1/2 Berry phase","authors":"","doi":"10.1016/j.rinp.2024.107907","DOIUrl":"10.1016/j.rinp.2024.107907","url":null,"abstract":"<div><p>This paper investigates the relation between the Berry phase of a spinor accumulated along a path corresponding to an adiabatically varying magnetic field and the conformal deformation along the path in the parameter space. The first part demonstrates that the accumulated phase can be controlled by continuous deformation characterized by a single conformal parameter. The source of the corresponding field strength responsible for the deformed phase path is shown to be a conformally deformed monopole located at the origin in the parameter space with the fundamental strength <span><math><mrow><mi>g</mi><mo>=</mo><mo>±</mo><mn>1</mn><mo>/</mo><mn>2</mn></mrow></math></span>. In the second part, we model a rotating magnetic field coupled to a charged spinor with a time-varying amplitude subjected to the conformal deformation, realizing a single-variable deformation of the evolution process of the phase path.</p></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2211379724005928/pdfft?md5=75ff7343a937386b485064136bf3d9c2&pid=1-s2.0-S2211379724005928-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141964646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}