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        <title>Frontiers in Physics | New and Recent Articles</title>
        <link>https://www.frontiersin.org/journals/physics</link>
        <description>RSS Feed for Frontiers in Physics | New and Recent Articles</description>
        <language>en-us</language>
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        <pubDate>2026-05-27T17:14:29.731+00:00</pubDate>
        <ttl>60</ttl>
        <item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1822647</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1822647</link>
        <title><![CDATA[A comprehensive review of quantum technologies for medical imaging]]></title>
        <pubdate>2026-05-26T00:00:00Z</pubdate>
        <category>Review</category>
        <author>Xiaokun Zhao</author><author>Ping Tie</author><author>Zuyue Chen</author>
        <description><![CDATA[Medical imaging, a cornerstone of modern diagnostics that underpins early disease detection and personalized therapy, continues to confront fundamental physical limitations inherent to conventional modalities, including suboptimal sensitivity and specificity, limited resolution, and ionizing radiation risks. Quantum imaging, leveraging principles such as entanglement, superposition, and quantum sensing, has emerged as a transformative paradigm with the potential to transcend these limitations. This review systematically summarizes the physical principles, technological advancements, and major clinical applications of quantum technologies in medical imaging. We elaborate on several cutting-edge modalities, including quantum dot probes for targeted imaging and surgical navigation, wearable magnetoencephalography facilitated by optically pumped magnetometers, quantum-enhanced magnetic resonance imaging with nanoscale resolution, quantum optical coherence tomography with dispersion cancellation, photon-counting computed tomography for superior spectral imaging, and nuclear medicine imaging that can visualize the molecular microenvironment. Additionally, the roles of quantum computing and quantum artificial intelligence in accelerating and optimizing the image analysis workflow are also discussed. Furthermore, we analyze the technical bottlenecks and translational barriers that currently hinder the widespread clinical implementation of these emerging technologies. Finally, we outline promising future research directions to accelerate clinical translation, underscoring the transformative potential of quantum medical imaging to advance precision diagnostics and personalized medicine.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1824530</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1824530</link>
        <title><![CDATA[Exactly explicit solutions of (2+1)-dimensional conformable fractional diffusive Predator–Prey model via neural networks method]]></title>
        <pubdate>2026-05-26T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Zhao Li</author><author>Minglang Wu</author><author>Ejaz Hussain</author><author>Yakup Yildirim</author>
        <description><![CDATA[In this paper, a solver is developed to obtain accurate analytical solutions for fractional partial differential equations based on artificial neural networks. By leveraging the powerful function approximation capability of neural networks in combination with the trial function method, a general analytical solution approach for fractional partial differential equations is proposed. The method is applied to a (2 + 1)-dimensional conformable fractional diffusive predator–prey system, and a series of exact analytical solutions are successfully derived. With the aid of Python mathematical software, three-dimensional surface plots, two-dimensional curve plots, gradient field plots, and contour plots in polar coordinates for selected solutions are generated to visually illustrate the morphological characteristics of the solutions. These implementations collectively verify the effectiveness and practicality of the proposed method.]]></description>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1847362</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1847362</link>
        <title><![CDATA[Intrinsic quantum anomalous Hall effect in two-dimensional Zr2O6]]></title>
        <pubdate>2026-05-26T00:00:00Z</pubdate>
        <category>Brief Research Report</category>
        <author>Yang Li</author>
        <description><![CDATA[Spin-gapless semiconductors (SGSs) have become an important topic in spintronics because they combine zero-gap electronic features with complete spin polarization, offering opportunities for low-dissipation transport and high-efficiency spin manipulation. This makes them natural candidates for hosting topological states such as the quantum anomalous Hall (QAH) phase. In this work, we show that honeycomb monolayer Zr2O6 belongs to a ferromagnetic QAH insulator. Without spin–orbit coupling, Zr2O6 shows linear band crossings (BCs) near the Fermi level (EF) only in the spin-down sector, whereas the spin-up sector remains gapped, giving rise to SGS nature. SOC then opens a gap for the bands of spin-up sector, and drives the system into a insulating state with C = −1, making Zr2O6 a good candidate for investigating the QAH physics.]]></description>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1789064</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1789064</link>
        <title><![CDATA[On Pauli matrices and the implied spacetime geometry]]></title>
        <pubdate>2026-05-25T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Gregory L. Light</author>
        <description><![CDATA[The commutator identity, 12σz,σx≡iσy, is shown to be equivalent to P≡momentum,X≡position=iℏI over the eigenspace of σy spanned by 1i, where 1≡1,0,0≡eX∈R3, i≡0,1∈C1≡Ry,z2, and 1,i≡eX⊕ez so that the particle travels along eX with its associated wave spinning on Ry,z2, accounting for the wave-particle duality; here, 12σz=momentum P leads to the half-spin, baryon asymmetry, and the origin of the rest mass and electric charge. The overall logic structure can be founded upon the relativistic energy equation, of which the complex conjugates lead to a pair of {matter, antimatter} with opposite linear momenta in a Euclidean 3-space, as manifested in ±σz, which is true if and only if σz represents a momentum operator, but momentum operator has its complement, the position operator, via the Fourier–Plancherel operator F, which in the present context takes the form of three 2-by-2 unitary matrices transforming among the three frames as associated with the three Pauli matrices: momentum σz, position σx, and a covering map σy:R→S1, thereby connecting classical and quantum physics. In short, Dirac’s spinor algebra initiated an incomplete cosmology.]]></description>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1841872</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1841872</link>
        <title><![CDATA[Optimization of gas turbine fault identification based on time-frequency analysis of acoustic and vibration signals and transformer]]></title>
        <pubdate>2026-05-25T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Xinsheng Wang</author>
        <description><![CDATA[IntroductionGas turbines are core equipment in industrial development, and their safe operation is of paramount importance. Fault identification in gas turbines can prevent significant economic losses and safety accidents; however, traditional approaches are time-consuming and inefficient. MethodsTherefore, this research introduces an optimized fault identification method based on time-frequency analysis of acoustic and vibration signals and a two-branch Transformer model. First, variational mode decomposition is performed on the acquired signals. Key intrinsic mode function components are selected based on correlation coefficients to reconstruct the signal, and their time-frequency domain features are extracted. Second, an autoencoder is used to reduce the dimensionality of high-dimensional features to retain key fault information. Finally, a two-branch Transformer model is constructed from the time step dimension and channel feature dimension to achieve accurate classification of fault states. Among them, the time step branch captures the temporal dependencies between vibration and acoustic signals through a masked multi head attention mechanism, which is consistent with the continuity of the fault evolution process. Channel branches utilize global attention to fuse the correlation features between multiple sensors, reflecting the collaborative changes of different measurement points in fault states. ResultsTests on three states show that, through variational mode decomposition and feature reduction to extract essential signal features, the introduced model obtains an overall classification accuracy of 92.5%. In cross-load condition tests, the constructed model achieves an average identification accuracy of 94.7%, with a maximum of 98.2%. Compared to the standard Transformer, the constructed model obtains a 5.9% improvement in identification accuracy under strong disturbance conditions with an 11.6% reduction in parameters. DiscussionThis method demonstrates higher identification accuracy and stronger stability, further contributing to the reliability of gas turbine fault identification. This provides a reliable technical solution for the accurate fault identification and health management of gas turbines and other mechanical equipment.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1828759</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1828759</link>
        <title><![CDATA[Structured beam generation and optical trapping of low-index particles using a semi-nonlinear Michelson interferometer]]></title>
        <pubdate>2026-05-21T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Mai Nguyet Cong</author><author>Bui Xuan Kien</author>
        <description><![CDATA[In this work, we propose a semi-nonlinear Michelson interferometer (SNMI) for controllable laser beam shaping and optical manipulation. By placing a Kerr-type nonlinear medium into one arm of the interferometer, the phase difference between the two arms becomes intensity-dependent, enabling dynamic control of the spatial profile of the output beam through the input laser power. Numerical simulations show that a conventional Gaussian beam can be transformed into a variety of structured beams, including flat-top, ring, bottle, and hollow Gaussian beams, under appropriate operating conditions. The generated hollow beam is proposed to trap “low-index” nanoparticles, whose refractive index is lower than that of the surrounding medium. The transverse optical gradient force acting on dielectric nanoparticles is analyzed under the Rayleigh scattering regime. The results indicate that the generated hollow-type beams can produce stable trapping regions for low-index nanoparticles, which are typically difficult to trap with standard Gaussian beams. The proposed SNMI provides a simple, tunable, and flexible platform for structured beam generation, with potential applications in trapping nanoparticles, as numerically observed and discussed.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1807760</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1807760</link>
        <title><![CDATA[Forced variable-coefficient Kawahara equations: closed-form traveling waves via tanh–coth and elliptic ansätze]]></title>
        <pubdate>2026-05-21T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>César A. Gómez S.</author><author>Álvaro H. Salas S.</author><author>Simeón Casanova Trujillo</author>
        <description><![CDATA[We investigated a forced variable-coefficient Kawahara equation as a non-autonomous extension of a classical fifth-order dispersive model arising in nonlinear wave propagation. Such equations are relevant in physical situations where the effective nonlinearity, dispersive balance, and external input vary with time, thereby generating wave dynamics that are not captured by the standard autonomous Kawahara equation. The main objective of this work was to derive explicit traveling-wave solutions and to clarify how temporal modulation and forcing affect the amplitude, baseline, phase, and propagation of the resulting wave structures. By introducing a traveling-wave variable with time-dependent phase together with a forcing primitive, the governing equation was reduced to ordinary differential equations amenable to exact symbolic analysis. Two complementary exact-solution procedures were then developed. First, an improved tanh–coth method based on a Riccati auxiliary equation was used to construct localized real-valued traveling-wave families. Second, an elliptic ansatz in terms of the Weierstrass ℘-function was employed to generate periodic solutions together with their solitary-wave degenerations. The obtained formulas yield explicit exact solutions and recover classical constant-coefficient Kawahara profiles as limiting cases. In addition, representative examples were examined using analytical formulas, numerical tables, and graphical diagnostics to illustrate the qualitative distinction between oscillatory forcing, decaying forcing, and the autonomous unforced regime. The results provide analytical benchmarks for forced dispersive models with time-dependent coefficients and establish a unified exact-solution framework for a broad class of non-autonomous Kawahara-type equations.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1789216</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1789216</link>
        <title><![CDATA[Performance benchmarking of AAA, AXB, and CCC approaches against Monte Carlo standards in Halcyon-based radiotherapy]]></title>
        <pubdate>2026-05-15T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Yutong Zhao</author><author>Jingjing Zhao</author><author>Xingming Ma</author><author>Zejun Jiang</author><author>Weipeng Sun</author><author>Zheqing Zhang</author><author>Yong Yin</author>
        <description><![CDATA[BackgroundAccurate dose calculation is essential for radiotherapy. The present study benchmarks the performances of the anisotropic analytical algorithm (AAA), Acuros XB (AXB), and collapsed cone convolution (CCC) methods against the Monte Carlo (MC) standard for the Halcyon platform across diverse anatomical sites.MethodsSixty-five clinical Halcyon plans were anonymized and recalculated using the AAA, AXB, CCC, and MC approaches; the corresponding algorithmic performances were evaluated using gamma passing rates (GPRs) of 2% per 2 mm and dose–volume histograms (DVHs) with the MC standard as the reference.ResultsAXB achieved the highest GPRs across most tumor sites; however, for the lung cancer plans, the performance of CCC was comparable to that of AXB and superior to that of AAA. All algorithms exhibited systematic dose deviations by underestimating and overestimating doses in the lung tissues and planning target volumes (PTVs). The gamma failures increased in the high-Hounsfield-unit and high-dose regions.ConclusionAlthough AXB is generally found to be the most accurate algorithm, AAA is also recommended owing to its faster calculations while maintaining acceptable accuracy. However, CCC is more strongly recommended than AAA for lung cases owing to its superior performance. Thus, the present study highlights the necessity for secondary MC verifications and the application of compensatory strategies to effectively address the inherent inaccuracies of deterministic algorithms.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1784051</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1784051</link>
        <title><![CDATA[Thermal analysis of mass concrete structures with cooling pipes by an adaptive moving Kriging method]]></title>
        <pubdate>2026-05-13T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Feng Zhang</author><author>Qingwen Li</author><author>FuXian Zhu</author>
        <description><![CDATA[Numerical simulation of the temperature field in massive concrete with embedded cooling water pipes is of great engineering significance for temperature control, crack prevention, and optimization of cooling strategies. To obtain an accurate temperature field, conventional finite element approaches often require local mesh refinement in regions with steep thermal gradients near the pipe wall, which makes model construction cumbersome. To overcome the dependence on mesh generation, this study couples a local weak-form Moving Kriging (MK) interpolation method with a moving mesh partial differential equation (MMPDE) approach for the thermal analysis of pipe cooled concrete. By exploiting the smoothness and differentiability of the Gaussian basis function, the proposed MK approximation is able to represent the continuous temperature field with sharp gradients in the vicinity of cooling pipes. Meanwhile, the MMPDE method constructs a metric tensor from the Hessian of the temperature field, thereby automatically driving nodes to concentrate in regions where the numerical solution varies rapidly. As a result, strong-gradient-induced numerical oscillations and excessive errors can be effectively suppressed without a significant increase in the degrees of freedom. Numerical results demonstrate that, compared with conventional fixed node distributions, the proposed algorithm achieves higher accuracy and improved stability.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1815424</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1815424</link>
        <title><![CDATA[Assessment of rare earth element fractionation in NIF implosions with radiochemically doped capsules]]></title>
        <pubdate>2026-05-13T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Daniel Pitman-Weymouth</author><author>John D. Despotopulos</author><author>Kelly N. Kmak</author><author>Justin Jeet</author><author>Keenan Thomas</author><author>Dawn A. Shaughnessy</author><author>James Benstead</author><author>Charles B. Yeamans</author><author>Tom Braun</author><author>William M. Kerlin</author><author>Rhyan Reynolds</author><author>Brian Sammis</author><author>Elvin Monzon</author><author>Todd Wooddy</author>
        <description><![CDATA[An ongoing experimental campaign at the National Ignition Facility (NIF) aims to measure neutron induced nuclear reaction cross–sections using radiochemically doped target capsules. Critical to this campaign is the ability to collect a representative sample of the reaction products using Solid Radiochemical Collectors (SRCs) fielded around the NIF chamber. The shot presented in this paper used a doped target capsule with a neopentane gas fill was to investigate the ratio of isotopes collected at three chamber angles. It was found that SRC samples of rare earth elements collected from NIF are representative of the ingoing dopant mix, thereby concluding that fractionation does not occur during a NIF implosion. This validates the doped capsule method for use in measuring neutron induced reaction cross-sections.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1811840</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1811840</link>
        <title><![CDATA[Strain wave structure of electron and positron]]></title>
        <pubdate>2026-05-13T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Gurcharn S. Sandhu</author><author>Ishaan S. Dhindsa</author>
        <description><![CDATA[By treating physical space as an elastic continuum, we show that elementary particles and their fields can be represented by stress–strain wave packets in the elastic space continuum. Dynamic equilibrium equations of elasticity reduce to vector wave equations involving displacement vectors in this continuum. We derive the equivalence between displacement vector U and the magnetic vector potential A to show that electromagnetic fields are manifestations of stress–strain fields in this continuum. The structure of the electron is modeled on a spherically symmetrical strain wave solution of the vector wave equilibrium equation. The solution consists of a central standing strain wave core approximately 2 fm in radius, surrounded by a radially decaying field of phase waves propagating outward for the positron and inwards for the electron. Approximately 37.3% of the energy of the electron is contained in its wave field and the remaining in the central standing wave core. We also derive the Coulomb interaction between two electrons and verify Coulomb’s law of electrostatics. The intrinsic electrostatic field, intrinsic spin, and magnetic field effects of the electron are derived from its strain wave structure. We also verify the Biot–Savart law for motion-induced magnetic fields and indicate the origin of De Broglie matter waves.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1778872</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1778872</link>
        <title><![CDATA[Exploring the migration of magic numbers in neutron-rich systems via knockout reactions]]></title>
        <pubdate>2026-05-12T00:00:00Z</pubdate>
        <category>Mini Review</category>
        <author>Hongna Liu</author>
        <description><![CDATA[Magic numbers are the backbone of the nuclear structure, serving as the basis for shell-model truncations, leading to the prediction of the island of stability, and linking to peaks in the solar-system abundance curve. Canonical nuclear magic numbers include 2, 8, 20, 28, 50, 82, and 126. It is now well established that these magic numbers are not universal over the nuclear landscape. This paper presents a brief review of recent highlights on the migration of magic numbers in neutron-rich nuclei, with particular emphasis on results obtained from knockout reactions. We focus on two key regions: 1) the loss of magicity at N = 20 and 28, and 2) the emergence of new magic numbers at N = 32, 34. Prospects for future measurements in these regions, enabled by new detection systems at upgraded and new facilities, are also discussed.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1824500</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1824500</link>
        <title><![CDATA[Research on early warning of global supply chain risks for China’s nickel ore imports: an interpretable deep learning approach]]></title>
        <pubdate>2026-05-08T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Weiming Gao</author><author>Yalin Lei</author><author>Li Li</author><author>Yuanchen Sun</author><author>Mingda Li</author><author>Sanmang Wu</author>
        <description><![CDATA[China’s nickel ore import supply chain can be regarded as a complex system exposed to coupled disturbances from geopolitical uncertainty, transport disruptions, market concentration, and demand growth. To capture the nonlinear evolution of these interacting risks, this study develops an interpretable computational modeling framework for risk assessment, early warning, and trade-inventory optimization. A four-dimensional indicator system covering availability, acceptability, accessibility, and controllability is first constructed, and an entropy-weighted Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) method is used to derive the composite risk index. Based on this index, a multi-model early warning framework is established and compared across representative machine-learning and deep-learning methods. The results show that the multilayer perceptron (MLP) achieves the best overall predictive performance among the benchmark models, indicating strong capability in capturing nonlinear and shock-driven risk fluctuations. SHAP analysis further reveals that inventory variation, transportation risk, and import concentration are the most influential drivers, followed by new energy vehicle demand growth and geopolitical risk. An MLP-based inversion model is then used to optimize trade-inventory coordination, reducing the risk index to 31.1 under the optimal scenario. The study provides an interpretable computational modeling framework for understanding, anticipating, and governing nickel ore import supply chain risk under complex global uncertainty.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1779391</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1779391</link>
        <title><![CDATA[Looped spacetime cosmology: a closed-time framework for quantum gravity and cosmology]]></title>
        <pubdate>2026-05-08T00:00:00Z</pubdate>
        <category>Hypothesis and Theory</category>
        <author>Richard T. Logue</author>
        <description><![CDATA[Looped Spacetime Cosmology (LSC) explores whether black hole interiors and the cosmological origin may be linked by a single global spacetime structure. The framework posits a compact S3×S1 topology in which astrophysical black hole trapped regions are globally identified with a common Big Bang hypersurface so that classical terminal curvature endpoints are replaced (at the level of induced data) by a compact global completion. As a minimal realization of nonterminal high-curvature behavior, we employ effective dynamics inspired by loop quantum cosmology (LQC), without assuming a specific ultraviolet completion. The resulting consequences are conditional: if the identification is dynamically admissible, then (i) classical singularities may be avoided in an effective description via bounded-density transitions; (ii) information carried by infalling degrees of freedom need not terminate at a singular boundary but can be globally accounted for on the identified hypersurface, contingent on an isometric mapping across the transition region; (iii) fine-grained entropy can remain globally conserved, while coarse-grained observers still experience an emergent arrow of time; and (iv) compact topology provides a setting in which infrared-regulated vacuum contributions can be consistent with a small late-time cosmological constant in representative models. LSC is formulated as a falsifiable hypothesis rather than a completed theory. Its empirical program is organized as hierarchical tests: Tier I gates probe sign-fixed curvature/topology consistency and can falsify the framework outright; Tier II tests constrain dark-sector realizations without negating the global identification if Tier I survives; and Tier III probes transition-region microphysics (e.g., model-dependent compact-object phenomenology) and is logically downstream. Near-term scrutiny is provided by spatial curvature and topology constraints, population-level compact-object spin statistics, and cross-channel consistency checks using cosmic microwave background (CMB) and large-scale structure data.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1817865</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1817865</link>
        <title><![CDATA[Joint security and energy optimization in UAV-enabled smart grid networks]]></title>
        <pubdate>2026-05-07T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Jian Wu</author><author>Xiaowei Hao</author><author>Junwei Ma</author><author>Yang Li</author>
        <description><![CDATA[IntroductionRecent years have witnessed an increasing number of Internet of Things devices (IoTDs) deployed in power grids to monitor bidirectional information and power transfer, transforming them into smart grids. The densification of IoTDs in smart grids demands communication solutions that are simultaneously secure against eavesdropping and energy-efficient for sustainable operation.MethodsThis article proposes an unmanned aerial vehicle (UAV) and reconfigurable intelligent surface (RIS)-assisted framework in smart grids that maximizes worst-case secrecy energy efficiency via joint optimization of the UAV’s trajectory, beamforming, and phase shifts of RIS. A twin attention-driven deep reinforcement learning algorithm, TAMRRTD3, is developed, featuring attention-based state representation and regret-aware reward design to enhance learning accuracy and convergence.Results and DiscussionSimulation results indicate that the proposed algorithm achieves a faster convergence rate and enhanced secrecy energy efficiency than the benchmark algorithms.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1811376</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1811376</link>
        <title><![CDATA[Wave structures and chaotic behaviors of perturbed nonlinear Biswas-Milovic equation with Kudryashov’s law of refractive index]]></title>
        <pubdate>2026-05-07T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Yuxi Zhang</author>
        <description><![CDATA[Nonlinear partial differential equations provide a fundamental mathematical framework for understanding the real world. This study presents a comprehensive analysis of perturbed nonlinear Biswas-Milovic equation with Kudryashov’s law of refractive index. By employing the traveling wave transformation, the original partial differential equation is first converted into a nonlinear ordinary differential equation. The Gaussian soliton solutions are then derived via the generalized trial equation method. To obtain its qualitative properties, a two-dimensional dynamic system is constructed accordingly. Subsequently, we establish the existence of periodic, kink and antikink soliton, and bell-shaped soliton solutions in the qualitative analysis. In particular, we obtained all traveling wave solutions to the equation in the quantitative analysis. Moreover, the exploration of chaotic dynamics is conducted by introducing specific perturbation terms, thereby revealing chaotic behaviors. To the best of our knowledge, this work is the first to provide a classification of possible traveling wave solutions to this equation and to show its chaotic properties.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1856933</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1856933</link>
        <title><![CDATA[Editorial: Advanced high power solid-state laser technology, volume II]]></title>
        <pubdate>2026-05-06T00:00:00Z</pubdate>
        <category>Editorial</category>
        <author>Rumao Tao</author><author>Oleg Antipov</author><author>Pengfei Ma</author><author>Haotong Ma</author>
        <description></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1776432</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1776432</link>
        <title><![CDATA[Bound states and resonance analysis of one-dimensional relativistic parity-symmetric two-point interactions]]></title>
        <pubdate>2026-05-01T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Carlos A. Bonin</author><author>Manuel Gadella</author><author>José T. Lunardi</author><author>Luiz A. Manzoni</author>
        <description><![CDATA[We consider the one-dimensional Dirac equation with the most general relativistic contact interaction supported on two points symmetrically located with respect to the origin. We use a distributional method to determine the shape of the interaction, which, in the present case, is equivalent to the standard method of defining contact interactions by self-adjoint extensions of symmetric operators. The interaction on each of these two points depends on four parameters, each one having a clear physical meaning. We are interested in the scattering and confining properties of this model. We focus our attention on even or odd interactions under parity transformations and investigate the existence of critical and supercritical states, bound states, confinement, and scattering resonances for some particular interactions of special interest.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1814739</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1814739</link>
        <title><![CDATA[High-sensitivity laser heterodyne radiometer based on balanced detection technology]]></title>
        <pubdate>2026-04-30T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Renshi Li</author><author>Hao Deng</author><author>Chenguang Yang</author><author>Tao Sun</author><author>Zhenyu Xu</author><author>Nailiang Cao</author><author>Ruifeng Kan</author>
        <description><![CDATA[A heterodyne radiometer (LHR) based on the balanced-detection method has been developed to evaluate system performance under both balanced-detection and single-channel-detection modes. Experimental results demonstrate that the balanced-detection LHR exhibits superior suppression of laser-induced noise compared to the traditional single-channel-detection LHR. The developed system achieved a noise equivalent power (NEP) of 2.53 × 10−15 W/√Hz, which is only 1.7 times of the theoretical quantum limit. To further assess system performance, measurements of atmospheric carbon dioxide (CO2) column abundance were conducted. The measurement precision of the balanced-detection LHR was determined to be approximately 0.6%, which is 5.67 times higher than that of the single-channel-detection LHR.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1815539</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1815539</link>
        <title><![CDATA[Structural measurement and resilience of China’s copyright trade dependency network under international regulation: a directed weighted network analysis]]></title>
        <pubdate>2026-04-30T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>XiaoXuan Zhang</author><author>Wenhong Qi</author><author>Han Liang</author>
        <description><![CDATA[In the context of globalization, copyright trade has become a pivotal arena for national cultural diplomacy and the competition of soft power. Although China has faced a persistent trade deficit over the past decade, there is an urgent need to investigate its deep-seated dependencies and risks from the perspective of network structures. This study constructs an ego-centric network model centered on China to analyze the intensity and distribution characteristics of its connections with various trade partners. The results indicate that network connections are highly concentrated among a few core hubs, exhibiting significant structural imbalance. China, within this network, finds itself in a predicament of extensive connections but insufficient control. The discussion suggests that it is imperative to optimize the network structure by implementing precise diversification strategies, building inter-community bridges, and shaping node advantages in specific subfields. These measures aim to enhance the overall resilience and structural power of China’s copyright trade system.]]></description>
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