Chinese Journal of Physics最新文献_第6页

Electrothermal flow of CNT-blood on a sensor plate with ramping shear and thermal flux: Electromagnetic biosensor applications 碳纳米管血液在传感器板上的电热流动，具有斜坡剪切和热通量：电磁生物传感器的应用

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2025-12-01 DOI: 10.1016/j.cjph.2025.10.029

Sanatan Das , Poly Karmakar , Biswajit Mandal , Chanchal Mandal , Rabindra Nath Jana

This study investigates the electrothermal hemodynamics of carbon nanotube-blended blood (CNT-blood) flow over an electromagnetic (EM) sensor plate under time-ramping shear stress and thermal flux conditions. Our computational model enables analysis of transient flow patterns and thermal profiles of CNT-blood under applied magnetic and electric fields. The flow regulating equations, considering porous medium resistance and infrared radiation, are solved analytically to examine the flow, and thermal distributions over the EM sensor plate. The results reveal that time-dependent shear stress and thermal flux significantly influence the flow dynamics and thermal response, enhancing the sensitivity of the EM sensor. Electrode/magnet width variation enables precise regulation of blood flow dynamics Infrared radiation intensity serves as the control parameter for blood temperature regulation. The sensor plate temperature is 18-22 % higher under a constant heat flux than a ramped one, due to continuous energy input. CNT-blood also exhibits 12-15 % greater thermal performance than nano-blood, as the hybrid CNTs network enhances phonon transport by reducing interfacial resistance. This research establishes a theoretical foundation for advancing electromagnetic biosensor technology, specifically for the continuous monitoring of hemorheological and thermal irregularities. The model’s inherent flexibility in responding to temporal variations extends its potential applications to dynamic biomedical environments, encompassing next-generation wearable sensors and implantable devices for cardiovascular assessment.

本研究研究了碳纳米管混合血液（CNT-blood）在时间变剪切应力和热通量条件下通过电磁（EM）传感器板的电热血流动力学。我们的计算模型能够分析碳纳米管血液在外加磁场和电场下的瞬态流动模式和热剖面。在考虑多孔介质阻力和红外辐射的情况下，对流动调节方程进行了解析求解，考察了电磁传感器板上的流动和热分布。结果表明，随时间变化的剪切应力和热通量显著影响流体动力学和热响应，提高了电磁传感器的灵敏度。电极/磁体宽度变化可精确调节血流动力学。红外辐射强度可作为调节血液温度的控制参数。由于连续的能量输入，在恒定的热通量下，传感器板的温度比斜坡温度高18- 22%。碳纳米管血液的热性能也比纳米血液高12- 15%，因为混合碳纳米管网络通过减少界面阻力来增强声子传输。本研究为推进电磁生物传感器技术，特别是对血液流变学和热异常的连续监测奠定了理论基础。该模型在响应时间变化方面的固有灵活性将其潜在应用扩展到动态生物医学环境，包括用于心血管评估的下一代可穿戴传感器和植入式设备。

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引用次数: 0

Degenerate soliton solutions and their dynamics in a coupled generalized nonlinear Schrödinger equations with the four-wave mixing effect 具有四波混频效应的耦合广义非线性Schrödinger方程中的简并孤子解及其动力学

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2025-12-01 DOI: 10.1016/j.cjph.2025.08.002

Dan-Yu Yang

Energy distribution of the degenerate solitons is more concentrated, they are more resistant to external disturbances (such as the noise and dispersion). This paper investigates the degenerate soliton solutions for coupled generalized nonlinear Schrödinger equations with the four-wave mixing effect in a birefringent fiber. Since the interactions of degenerate solitons in this equations are not studied, this paper investigate the properties and inelastic interactions of degenerate solitons. We construct the two-, three- and four-degenerate soliton solutions with one and two spectral parameters. According to the asymptotic analysis method, we find that the amplitudes of the interacting solitons retain unchanged upon the interactions, thus the elastic interactions between two degenerate solitons are depicted. Relative distance between two asymptotic solitons exhibits logarithmic growth with

| t |

, where

t

represents the retarded time. Soliton separation acceleration decays exponentially with relative distance, eventually tends to zero. Phase shifts vary slowly with

t

. Elastic and inelastic interactions of three and four degenerate solitons with multiple iterations of one and two spectral parameters are presented. Different from the previous literary works, this paper solves the degenerate soliton solutions of this equations using the multiple spectral parameters and obtains some inelastic interactions. Elastic interactions may provide a technical foundation for the high fidelity information transmission. Inelastic interactions may have wide applications in the energy conversion and signal processing. This paper may be helpful for understanding the soliton propagation characteristics in the nonlinear media.

简并孤子的能量分布更集中，对外界干扰（如噪声和色散）的抵抗能力更强。研究了双折射光纤中具有四波混频效应的耦合广义非线性Schrödinger方程的简并孤子解。由于没有研究该方程中简并孤子的相互作用，本文研究了简并孤子的性质和非弹性相互作用。构造了具有一个和两个谱参数的二简并孤子解、三简并孤子解和四简并孤子解。根据渐近分析方法，我们发现相互作用孤子的幅值在相互作用时保持不变，从而描述了两个简并孤子之间的弹性相互作用。两个渐近孤子之间的相对距离随着|到|呈对数增长，其中t表示延迟时间。孤子分离加速度随相对距离呈指数衰减，最终趋于零。相移随时间缓慢变化。给出了具有一个和两个谱参数多次迭代的三个和四个简并孤子的弹性和非弹性相互作用。与以往文献不同的是，本文利用多谱参数求解了该方程的简并孤子解，得到了一些非弹性相互作用。弹性相互作用可以为高保真信息传输提供技术基础。非弹性相互作用在能量转换和信号处理中有着广泛的应用。本文有助于理解孤子在非线性介质中的传播特性。

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引用次数: 0

Multi-scale analysis of solute dispersion in a rotating electro-osmotic flow between two plates 两板间旋转电渗透流动中溶质分散的多尺度分析

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2025-12-01 DOI: 10.1016/j.cjph.2025.11.011

Aruna A , Swarup Barik , Srinivas Jangili

This study utilizes the multiscale homogenization technique to analyze the two-dimensional concentration distribution of a solute in a rotating electro-osmotic flow through parallel plates. A solute injection is used to evaluate mass transport characteristics by deriving the dispersion coefficient, mean and two-dimensional concentration profiles for both primary and secondary flows. Previous studies have investigated solute dispersion in electro-osmotic flow using multi-scale homogenization. However, the influence of rotation remains largely unexplored, despite its significance in many Lab-on-Chip devices. The combined effect of rotation together with the applied electric field can lead to enhanced transport characteristics. The influence of the electro-osmotic parameter (K) and rotational frequency (ω) on the solute transport along both flows is studied. Results show that in the primary flow, the solute concentration exhibits fluctuations for varying K and ω values. For small K, velocity is confined near the boundaries, while rotation enhances transport and flattens concentration distributions. In secondary flow, the mean concentration decreases with increasing K and varies non-monotonically with ω, exerting a stronger influence than K in secondary flows. Importantly, the two-dimensional concentration distribution remains symmetrical and uniform across the channel cross-section along the primary and secondary flows over time (τ). Over time, the bimodal distribution of concentration variation transitions to an unimodal one across the cross-section in both flows. This study contributes to a better understanding of detecting the disease in blood, separation of chemicals, DNA molecules and plasma, which can be seen in a lab-on-a-chip devices.

本研究利用多尺度均质化技术分析了平行板旋转电渗透流动中溶质的二维浓度分布。溶质注入法通过推导一次流和二次流的分散系数、平均浓度和二维浓度分布来评估质量输运特性。以往的研究利用多尺度均质化技术研究了电渗透流动中溶质的分散。然而，旋转的影响在很大程度上仍未被探索，尽管它在许多芯片实验室设备中具有重要意义。旋转与外加电场的联合作用可导致输运特性的增强。研究了电渗透参数(K)和旋转频率（ω）对两种流体中溶质输运的影响。结果表明，在一次流动中，溶质浓度随K和ω值的变化而波动。对于较小的K，速度被限制在边界附近，而旋转增强输运并使浓度分布平坦化。在二次流中，平均浓度随K的增大而减小，且随ω呈非单调变化，对二次流的影响强于K。重要的是，随着时间的推移，沿一次流和二次流的二维浓度分布在通道横截面上保持对称和均匀（τ）。随着时间的推移，浓度变化的双峰分布在两个流动的横截面上转变为单峰分布。这项研究有助于更好地理解在血液中检测疾病、分离化学物质、DNA分子和血浆，这些都可以在芯片实验室设备上看到。

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引用次数: 0

Denoising gravitational wave with deep learning in the time-frequency domain 基于时频域深度学习的引力波降噪方法

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2025-12-01 DOI: 10.1016/j.cjph.2025.11.013

Yi-De Lee, Hwei-Jang Yo

Gravitational wave denoising is an ongoing task for revealing the events of compact binary objects in the universe. Recently, with the aid of deep learning, gravitational waves have been efficiently and delicately extracted from the noisy data compared with the traditional match-filtering. While most of the relevant studies adopt the data in the time series only, the time-frequency data processing is also in progress due to its several advantages for the waveform denoising. Here, we target the gravitational waves events emitted by binary black hole (BBH) mergers, with their total mass larger than 30 solar masses. For denoising, we propose a deep learning model utilizing the Griffin-Lim algorithm, an existing numerical approach to restore the phase information from the related amplitude spectrogram. This design allows extra attention on the phase recovery by using a priorly denoised amplitude spectrogram. The denoising results fit well in both the amplitude and the phase alignments of the mock injected waveforms. We also apply our model to the real detected events and discover a nice consistency with the simulated template waveforms, especially the high accuracy around the merger stage. Our work suggests the possibility of a better methodological design for gravitational wave data analysis.

引力波去噪是揭示宇宙中紧密双星天体事件的一项持续任务。近年来，与传统的匹配滤波相比，利用深度学习技术可以有效、精细地从噪声数据中提取引力波。虽然大多数相关研究只采用时间序列的数据，但由于时频数据处理在波形去噪方面的诸多优势，它也在进行中。在这里，我们的目标是双黑洞（BBH）合并发出的引力波事件，它们的总质量大于30个太阳质量。对于去噪，我们提出了一种利用Griffin-Lim算法的深度学习模型，这是一种现有的数值方法，可以从相关振幅谱图中恢复相位信息。这种设计可以通过使用预先去噪的幅度谱图来对相位恢复进行额外的关注。降噪结果与模拟注入波形的幅度对准和相位对准吻合较好。将该模型应用于实际检测事件，结果表明该模型与模拟的模板波形具有较好的一致性，特别是在合并阶段前后的精度较高。我们的工作为引力波数据分析提供了更好的方法设计的可能性。

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引用次数: 0

An improved car-following model considering visual occlusion in heterogeneous traffic at signalized intersections 考虑信号交叉口异构交通视觉遮挡的改进车辆跟随模型

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2025-12-01 DOI: 10.1016/j.cjph.2025.11.009

Tieqiao Tang , Yanzhe Zhao , Shangwu Wen , Mengxin Qin , Jian Zhang

Large vehicles at signalized intersections often obstruct traffic signal visibility, which forces small vehicle drivers to rely solely on preceding vehicle movements and increases collision risks. Existing car-following models inadequately address this visual occlusion phenomenon. This study develops a modeling framework by introducing three key innovations into the full velocity difference (FVD) model. First, a binary occlusion function

S

based on sight distance triangles is established to determine when visual obstruction occurs. Second, the vehicle driving strategy with the yellow light phase in the dilemma zone is integrated into the car-following model by using two binary functions

D

and

W

. Third, a spacing-dependent speed difference adjustment mechanism is proposed, where drivers modify their following behavior according to four decision rules based on vehicular spacing and relative velocity conditions by

γ

. For the purpose of quantifying the impact of this mechanism on traffic safety at signalized intersections, we developed an FVD model that incorporates the occlusion phenomenon (FVD-OP) for simulation analysis. To mitigate safety risks, an FVD-based spacing guidance strategy model (FVD-SG) is further developed that maintains safe following distances by adjusting acceleration through the parameter

μ

when occlusion is detected. Simulation results reveal that large vehicle penetration rates above 15 % significantly destabilize traffic flow, with traditional models showing DRAC reaching 6.09 m/s² under 20 % penetration. The proposed FVD-SG model reduces collision risks by up to 56.65 % while maintaining traffic efficiency, and can significantly reduce the percentage of vehicles trapped in a dilemma zone from 14.92 to 2.21 %. Sensitivity analysis identifies optimal parameter ranges (

γ

≤1.0,

μ

≤0.2) that ensure system stability across varying traffic conditions, demonstrating the model's effectiveness in addressing visual occlusion challenges in heterogeneous traffic flow.

在有信号的十字路口，大型车辆往往会阻碍交通信号的可见性，这迫使小型车辆驾驶员只能依靠前面的车辆运动，从而增加了碰撞风险。现有的汽车跟随模型不能充分解决这种视觉遮挡现象。本研究通过在全速度差（FVD）模型中引入三个关键创新，开发了一个建模框架。首先，建立基于视距三角形的二值遮挡函数S，判断何时发生视觉障碍；其次，利用二值函数D和w将困境区黄灯期车辆的行驶策略整合到车辆跟随模型中。第三，提出了一种基于间隔的速度差调整机制，驾驶员根据基于车辆间距和相对速度条件的4条决策规则通过γ调整其跟随行为。为了量化这一机制对信号交叉口交通安全的影响，我们开发了一个包含遮挡现象的FVD模型（FVD- op）进行仿真分析。为了降低安全风险，进一步开发了一种基于fvd的间距制导策略模型（FVD-SG），该模型在检测到遮挡时通过参数μ调节加速度来保持安全的跟随距离。仿真结果表明，15%以上的大车辆渗透率会显著破坏交通流的稳定性，传统模型显示，20%渗透率下的DRAC达到6.09 m/s2。提出的FVD-SG模型在保持交通效率的前提下，将碰撞风险降低了56.65%，并将陷入两难区的车辆比例从14.92%显著降低到2.21%。灵敏度分析确定了在不同交通条件下确保系统稳定性的最佳参数范围（γ≤1.0,μ≤0.2），证明了该模型在解决异构交通流中视觉遮挡挑战方面的有效性。

{"title":"An improved car-following model considering visual occlusion in heterogeneous traffic at signalized intersections","authors":"Tieqiao Tang , Yanzhe Zhao , Shangwu Wen , Mengxin Qin , Jian Zhang","doi":"10.1016/j.cjph.2025.11.009","DOIUrl":"10.1016/j.cjph.2025.11.009","url":null,"abstract":"<div><div>Large vehicles at signalized intersections often obstruct traffic signal visibility, which forces small vehicle drivers to rely solely on preceding vehicle movements and increases collision risks. Existing car-following models inadequately address this visual occlusion phenomenon. This study develops a modeling framework by introducing three key innovations into the full velocity difference (FVD) model. First, a binary occlusion function <span><math><mi>S</mi></math></span> based on sight distance triangles is established to determine when visual obstruction occurs. Second, the vehicle driving strategy with the yellow light phase in the dilemma zone is integrated into the car-following model by using two binary functions <span><math><mi>D</mi></math></span> and <span><math><mi>W</mi></math></span>. Third, a spacing-dependent speed difference adjustment mechanism is proposed, where drivers modify their following behavior according to four decision rules based on vehicular spacing and relative velocity conditions by <span><math><mi>γ</mi></math></span>. For the purpose of quantifying the impact of this mechanism on traffic safety at signalized intersections, we developed an FVD model that incorporates the occlusion phenomenon (FVD-OP) for simulation analysis. To mitigate safety risks, an FVD-based spacing guidance strategy model (FVD-SG) is further developed that maintains safe following distances by adjusting acceleration through the parameter <span><math><mi>μ</mi></math></span> when occlusion is detected. Simulation results reveal that large vehicle penetration rates above 15 % significantly destabilize traffic flow, with traditional models showing DRAC reaching 6.09 m/s<sup>2</sup> under 20 % penetration. The proposed FVD-SG model reduces collision risks by up to 56.65 % while maintaining traffic efficiency, and can significantly reduce the percentage of vehicles trapped in a dilemma zone from 14.92 to 2.21 %. Sensitivity analysis identifies optimal parameter ranges (<span><math><mi>γ</mi></math></span>≤1.0, <span><math><mi>μ</mi></math></span>≤0.2) that ensure system stability across varying traffic conditions, demonstrating the model's effectiveness in addressing visual occlusion challenges in heterogeneous traffic flow.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 1053-1068"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145614693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Solute dispersion in nanofluid flow in a microvessel: A two-layered fluid model 微血管中纳米流体流动中的溶质分散：一个双层流体模型

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2025-12-01 DOI: 10.1016/j.cjph.2025.08.008

Ajani Ausaru , P. Nagarani , Andre Small , P.V.S.N. Murthy

This paper analyzes the solute dispersion process in pulsatile nanofluid flow, treated as a two-layered (Casson-Newtonian) flow in a microvessel. The peripheral layer is taken as a porous Newtonian fluid and the core layer as a Casson fluid. Flow equations are solved using the perturbation method. The generalized dispersion method was used to solve the convection-diffusion equation. The transport coefficients are obtained analytically in the case of no wall absorption. The mean concentration expression is obtained in terms of these transport coefficients. The impact of the yield stress of the fluid, the amplitude of the pulsatile pressure gradient, the nanoparticle volume fraction and diameter, the slip velocity parameter, the permeability parameter, plasma layer thickness, and microvessel diameter on the transport coefficients and mean concentration is analyzed. It is observed that the yield stress of the fluid, the amplitude of the pulsatile pressure gradient, the diameter of the microvessel, and the volume fraction of the nanoparticles have a substantial impact on both the dispersion coefficient and mean concentration of the solute. In contrast, the diameter of the nanoparticles did not exhibit any remarkable effect on these two quantities, whereas the other parameters showed some influence but not so significantly.

本文分析了脉动纳米流体中溶质的分散过程，将其视为微血管中的两层（卡森-牛顿）流动。外围层为多孔牛顿流体，岩心层为卡森流体。流动方程采用摄动法求解。采用广义色散法求解对流扩散方程。在无壁面吸收的情况下，解析得到了输运系数。平均浓度表达式是用这些输运系数表示的。分析了流体屈服应力、脉动压力梯度幅值、纳米颗粒体积分数和直径、滑移速度参数、渗透率参数、等离子体层厚度和微血管直径对输运系数和平均浓度的影响。结果表明，流体屈服应力、脉动压力梯度幅值、微血管直径和纳米颗粒体积分数对溶质的分散系数和平均浓度均有较大影响。相比之下，纳米颗粒的直径对这两个量没有任何显著影响，而其他参数对这两个量有一定影响，但不那么显著。

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引用次数: 0

Design of multi-scroll attractors in a memristive CNN chaotic system incorporating Julia fractal and its predefined-time sliding mode synchronization 基于Julia分形的记忆CNN混沌系统的多涡旋吸引子设计及其预定义时间滑模同步

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2025-12-01 DOI: 10.1016/j.cjph.2025.08.018

Jie Zhang, Jiliang Lv, Xiaodong Wei

This paper proposes an improved memristor model and constructs a chaotic system using the cellular neural network (CNN) framework. The system’s complex dynamic behavior is investigated through Lyapunov exponents, bifurcation diagrams, and time series analysis. Furthermore, a circuit simulation is carried out to implement the proposed system. This paper presents the Julia fractal theory and uses this method to generate multi-scroll attractors. Finally, predefined-time sliding mode synchronization is proposed, and its effectiveness is verified through simulation.

本文提出了一种改进的忆阻器模型，并利用细胞神经网络（CNN）框架构建了一个混沌系统。通过李雅普诺夫指数、分岔图和时间序列分析研究了系统的复杂动态行为。此外，还进行了电路仿真来实现所提出的系统。本文提出了Julia分形理论，并利用该方法生成了多涡旋吸引子。最后，提出了预定义时间滑模同步方法，并通过仿真验证了其有效性。

引用次数: 0

Arbitrary single-qubit operation teleportation without quantum teleportation 无量子隐形传态的任意单量子操作隐形传态

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2025-12-01 DOI: 10.1016/j.cjph.2025.11.002

Wei-Min Shi , Ling-shuo Sun , Yi-Hua Zhou , Yu-Guang Yang

We propose a scheme for teleporting an arbitrary single-qubit unitary operation U without relying on quantum state teleportation. The proposed scheme decomposes an arbitrary single-qubit operation U into a combination of quantum rotation gates and uses a four-qubit entangled resource and three classical communication channels. The operation is remotely implemented through local operations and measurements. Since the target state is never reconstructed at the sender’s side, the scheme ensures information security while reducing quantum resource consumption compared with existing approaches.

提出了一种不依赖量子态隐形传态传输任意单量子位元幺正操作U的方案。该方案将任意单量子比特操作U分解为量子旋转门的组合，并使用一个四量子比特纠缠资源和三个经典通信信道。该操作通过本地操作和测量远程实现。由于目标状态永远不会在发送方重建，因此与现有方法相比，该方案在确保信息安全的同时减少了量子资源消耗。

引用次数: 0

Enhanced quantum sensing in time-modulated non-Hermitian systems 时间调制非厄米系统中增强的量子传感

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2025-12-01 DOI: 10.1016/j.cjph.2025.11.022

Qi-Cheng Wu , Yan-Hui Zhou , Tong Liu , Yi-Hao Kang , Qi-Ping Su , Chui-Ping Yang

Enhancing the sensitivity of quantum sensing near exceptional points represents a significant phenomenon in non-Hermitian (NH) systems. However, the application of this property in time-modulated NH systems remains largely unexplored. In this work, we propose two theoretical schemes to achieve enhanced quantum sensing in time-modulated NH systems by leveraging the coalescence of eigenvalues and eigenstates. We conduct a comprehensive analysis of the full energy spectrum, including both real and imaginary components, the population distribution of eigenstates, and various characteristics associated with optimal conditions for sensitivity enhancement. Numerical simulations confirm that eigenvalue-based quantum sensors exhibit a 9.21-fold improvement over conventional Hermitian sensors, aligning with the performance of existing time-independent NH sensors. In contrast, for eigenstate-based quantum sensors, the enhancement reaches up to 50 times that of conventional Hermitian sensors, surpassing the performance of existing time-independent NH sensors. Moreover, the eigenstate-based sensor exhibits divergent susceptibility even when the system’s parameters are not close to an exceptional point. Our findings pave the way for advanced sensing in time-sensitive contexts, complementing existing efforts to harness the unique properties of open systems.

在非厄米（NH）系统中，提高异常点附近的量子传感灵敏度是一个重要现象。然而，这一特性在时调制NH系统中的应用在很大程度上仍未被探索。在这项工作中，我们提出了两种理论方案，通过利用特征值和特征态的聚并来实现时间调制NH系统中增强的量子传感。我们对全能谱进行了全面的分析，包括实分量和虚分量，特征态的总体分布，以及与灵敏度增强的最佳条件相关的各种特征。数值模拟证实，基于特征值的量子传感器比传统的厄米传感器性能提高了9.21倍，与现有的时间无关的NH传感器性能一致。相比之下，对于基于特征态的量子传感器，增强达到传统厄米传感器的50倍，超过了现有的时间无关的NH传感器的性能。此外，基于特征态的传感器即使在系统参数不接近异常点时也表现出发散的敏感性。我们的发现为时间敏感环境中的高级传感铺平了道路，补充了利用开放系统独特特性的现有努力。

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引用次数: 0

Five-layer diffractive metasurfaces enable full (de)multiplexing of orbital angular momentum modes, wavelengths, and polarizations 五层衍射超表面可以实现轨道角动量模式、波长和偏振的全（去）复用

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics

Pub Date : 2025-12-01 DOI: 10.1016/j.cjph.2025.09.011

Shu Chen , Qingji Zeng , Jing Wang , Haisheng Wu , Zhibin Wu , Junmin Liu , Huapeng Ye , Dianyuan Fan , Shuqing Chen

Optical orbital angular momentum (OAM) modes have emerged as a critical photonic degree of freedom for enhancing channel capacity density in multiplexing communications, harnessing their inherent mode orthogonality and compatibility with conventional wavelength and polarization dimensions. Despite existing reports on OAM mode (de)multiplexing, a multi-dimensional hybrid (de)multiplexer enabling full manipulation of OAM modes, wavelengths, and polarizations remains elusive, leading to poor scalability and serious system redundancy in pervious discrete component-based configurations. To bridge this gap, a spin-decoupled multi-layer phase modulation method for multi-dimensional OAM mode manipulation is introduced, which implements multi-plane light conversion on a five-layer diffractive metasurface platform. By integrating the wavelength-dependent Fresnel diffraction functions with cascaded phase-engineered modulations, this approach facilitates deterministic OAM mode conversions across multiple spectral channels, along with channel transitions between longitudinal-transverse spatial domains. When combined with a spin-decoupled phase modulation mechanism, it allows for parallel processing of a pair of orthogonal circular polarization channels, thereby unlocking full-dimensional (de)multiplexing. For validation, we demonstrated 12-channel multi-dimensional OAM mode (de)multiplexing, involving two OAM modes, three wavelengths, and two polarizations. The multiplexed channels achieved OAM mode purities exceeding 85%, with demultiplexed channels maintaining average crosstalk levels under -17.27 dB. Thereafter, lager-scale quadrature phase shift keying signals were multiplexed for transmission, attaining a bit error rate close to 10^-5. Our accomplishments offer a scalable and compact solution for fully manipulating OAM modes, wavelengths, and polarizations, advancing the development of multi-dimensional OAM-enabled optical communications.

光学轨道角动量（OAM）模式利用其固有的模式正交性以及与常规波长和偏振尺寸的兼容性，已成为提高复用通信中信道容量密度的关键光子自由度。尽管已有关于OAM模式（解）复用的报道，但能够完全操纵OAM模式、波长和偏振的多维混合（解）复用器仍然难以实现，导致可扩展性差，并且在以前基于离散组件的配置中存在严重的系统冗余。为了弥补这一缺陷，提出了一种用于多维OAM模式操作的自旋解耦多层相位调制方法，该方法在五层衍射超表面平台上实现了多平面光转换。通过将波长相关的菲涅耳衍射函数与级联相位工程调制相结合，该方法促进了跨多个光谱通道的确定性OAM模式转换，以及纵向和横向空间域之间的通道转换。当与自旋解耦相位调制机制相结合时，它允许并行处理一对正交圆极化通道，从而解锁全维（解）复用。为了验证，我们演示了12通道多维OAM模式（解）复用，涉及两个OAM模式，三个波长和两个偏振。复用通道的OAM模式纯度超过85%，而解复用通道的平均串扰水平保持在-17.27 dB以下。然后，将大尺度正交相移键控信号复用传输，误码率接近10-5。我们的成就为完全操纵OAM模式，波长和偏振提供了可扩展和紧凑的解决方案，推进了多维OAM光通信的发展。

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引用次数: 0