Chinese Physics B最新文献_第3页

Frequency-modulated continuous-wave multiplexed gas sensing based on optical frequency comb calibration 基于光学频率梳校准的频率调制连续波多路复用气体传感技术

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-08-01 DOI: 10.1088/1674-1056/ad5980

Linhua Jia, Xinghua Qu, Fumin Zhang

{"title":"Frequency-modulated continuous-wave multiplexed gas sensing based on optical frequency comb calibration","authors":"Linhua Jia, Xinghua Qu, Fumin Zhang","doi":"10.1088/1674-1056/ad5980","DOIUrl":"https://doi.org/10.1088/1674-1056/ad5980","url":null,"abstract":"Laser absorption spectroscopy has proven to be an effective approach for gas sensing, which plays an important role in the fields of military, industry, medicine and basic research. This paper presents a multiplexed gas sensing system based on optical frequency comb (OFC) calibrated frequency-modulated continuous-wave (FMCW) tuning nonlinearity. The system can be used for multi-parameter synchronous measurement of gas absorption spectrum and multiplexed optical path. Multi-channel parallel detection is realized by combining wavelength division multiplexing (WDM) and frequency division multiplexing (FDM) techniques. By introducing nonlinear optical crystals, broadband spectrum detection is simultaneously achieved over a bandwidth of hundreds of nanometers. An OFC with ultra-high frequency stability is used as the frequency calibration source, which guarantees the measurement accuracy. The test samples involve H13C14N, C2H2 and Rb vapor cells of varying densities and 5 parallel measurement experiments are designed. The results show that the measurement accuracies of spectral absorption line and the optical path are 150 MHz and 20 μm, respectively. The scheme offers the advantages of multiplexed, multi-parameter, wide spectrum and high resolution detection, which can realize the identification of multi-gas components and the high-precision inversion of absorption lines under different environments. The proposed sensor demonstrates great potential in the field of high-resolution absorption spectrum measurement for gas sensing applications.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142209277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Dynamic properties of rumor propagation model induced by Lévy noise on social networks 莱维噪声诱导的社交网络谣言传播模型的动态特性

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-08-01 DOI: 10.1088/1674-1056/ad58c5

Ying Jing, Youguo Wang, Qiqing Zhai, Xianli Sun

{"title":"Dynamic properties of rumor propagation model induced by Lévy noise on social networks","authors":"Ying Jing, Youguo Wang, Qiqing Zhai, Xianli Sun","doi":"10.1088/1674-1056/ad58c5","DOIUrl":"https://doi.org/10.1088/1674-1056/ad58c5","url":null,"abstract":"Social networks are inevitably subject to disruptions from the physical world, such as sudden internet outages that sever local connections and impede information flow. While Gaussian white noise, commonly used to simulate stochastic disruptions, only fluctuates within a narrow range around its mean and fails to capture large-scale variations, Lévy noise can effectively compensate for this limitation. Therefore, a susceptible–infected–removed rumor propagation model with Lévy noise is constructed on homogeneous and heterogeneous networks, respectively. Then, the existence of a global positive solution and the asymptotic path-wise of the solution are derived on heterogeneous networks, and the sufficient conditions of rumor extinction and persistence are investigated. Subsequently, theoretical results are verified through numerical calculations and the sensitivity analysis related to the threshold is conducted on the model parameters. Through simulation experiments on Watts–Strogatz (WS) and Barabási–Albert networks, it is found that the addition of noise can inhibit the spread of rumors, resulting in a stochastic resonance phenomenon, and the optimal noise intensity is obtained on the WS network. The validity of the model is verified on three real datasets by particle swarm optimization algorithm.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142209296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Lewis acid-doped transition metal dichalcogenides for ultraviolet–visible photodetectors 用于紫外-可见光光电探测器的路易斯酸掺杂过渡金属二钙化物

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-08-01 DOI: 10.1088/1674-1056/ad597f

Heng Yang, Mingjun Ma, Yongfeng Pei, Yufan Kang, Jialu Yan, Dong He, Changzhong Jiang, Wenqing Li, Xiangheng Xiao

引用次数: 0

Dzyaloshinskii–Moriya interaction and field-free sub-10 nm topological magnetism in Fe/bismuth oxychalcogenides heterostructures 铁/铋氧粲金属异质结构中的 Dzyaloshinskii-Moriya 相互作用和无场亚 10 纳米拓扑磁性

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-08-01 DOI: 10.1088/1674-1056/ad6a0e

Yaoyuan Wang, Long You, Kai Chang, Hongxin Yang

{"title":"Dzyaloshinskii–Moriya interaction and field-free sub-10 nm topological magnetism in Fe/bismuth oxychalcogenides heterostructures","authors":"Yaoyuan Wang, Long You, Kai Chang, Hongxin Yang","doi":"10.1088/1674-1056/ad6a0e","DOIUrl":"https://doi.org/10.1088/1674-1056/ad6a0e","url":null,"abstract":"Topological magnetism with strong robustness, nanoscale dimensions and ultralow driving current density (∼ 106 A/m2) is promising for applications in information sensing, storage, and processing, and thus sparking widespread research interest. Exploring candidate material systems with nanoscale size and easily tunable properties is a key for realizing practical topological magnetism-based spintronic devices. Here, we propose a class of ultrathin heterostructures, Fe/Bi2O2<italic toggle=\"yes\">X</italic> (<italic toggle=\"yes\">X</italic> = S, Se, Te) by deposing metal Fe on quasi-two-dimensional (2D) bismuth oxychalcogenides Bi2O2<italic toggle=\"yes\">X</italic> (<italic toggle=\"yes\">X</italic> = S, Se, Te) with excellent ferroelectric/ferroelastic properties. Large Dzyaloshinskii–Moriya interaction (DMI) and topological magnetism can be realized. Our atomistic spin dynamics simulations demonstrate that field-free vortex–antivortex loops and sub-10 nm skyrmions exist in Fe/Bi2O2S and Fe/Bi2O2Se interfaces, respectively. These results provide a possible strategy to tailor topological magnetism in ultrathin magnets/2D materials interfaces, which is extremely vital for spintronics applications.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142209269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Noise-induced phase transition in the Vicsek model through eigen microstate methodology 通过特征微观状态方法研究维塞克模型中的噪声诱导相变

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-08-01 DOI: 10.1088/1674-1056/ad5aed

Yongnan Jia, Jiali Han, Qing Li

引用次数: 0

Riemann–Hilbert problem for the defocusing Lakshmanan–Porsezian–Daniel equation with fully asymmetric nonzero boundary conditions 具有完全非对称非零边界条件的失焦拉克什曼-波尔舍西安-丹尼尔方程的黎曼-希尔伯特问题

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-08-01 DOI: 10.1088/1674-1056/ad5af2

Jianying Ji, Xiyang Xie

{"title":"Riemann–Hilbert problem for the defocusing Lakshmanan–Porsezian–Daniel equation with fully asymmetric nonzero boundary conditions","authors":"Jianying Ji, Xiyang Xie","doi":"10.1088/1674-1056/ad5af2","DOIUrl":"https://doi.org/10.1088/1674-1056/ad5af2","url":null,"abstract":"The Riemann–Hilbert approach is demonstrated to investigate the defocusing Lakshmanan–Porsezian–Daniel equation under fully asymmetric nonzero boundary conditions. In contrast to the symmetry case, this paper focuses on the branch points related to the scattering problem rather than using the Riemann surfaces. For the direct problem, we analyze the Jost solution of lax pairs and some properties of scattering matrix, including two kinds of symmetries. The inverse problem at branch points can be presented, corresponding to the associated Riemann–Hilbert. Moreover, we investigate the time evolution problem and estimate the value of solving the solutions by Jost function. For the inverse problem, we construct it as a Riemann–Hilbert problem and formulate the reconstruction formula for the defocusing Lakshmanan–Porsezian–Daniel equation. The solutions of the Riemann–Hilbert problem can be constructed by estimating the solutions. Finally, we work out the solutions under fully asymmetric nonzero boundary conditions precisely via utilizing the Sokhotski–Plemelj formula and the square of the negative column transformation with the assistance of Riemann surfaces. These results are valuable for understanding physical phenomena and developing further applications of optical problems.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142209302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Half-metallic ferromagneticWeyl fermions related to dynamic correlations in the zinc-blende compound VAs 与锌-蓝晶石化合物 VAs 中动态相关性有关的半金属铁磁性韦尔费米子

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-08-01 DOI: 10.1088/1674-1056/ad5f86

Xianyong Ding, Haoran Wei, Ruixiang Zhu, Xiaoliang Xiao, Xiaozhi Wu, Rui Wang

{"title":"Half-metallic ferromagneticWeyl fermions related to dynamic correlations in the zinc-blende compound VAs","authors":"Xianyong Ding, Haoran Wei, Ruixiang Zhu, Xiaoliang Xiao, Xiaozhi Wu, Rui Wang","doi":"10.1088/1674-1056/ad5f86","DOIUrl":"https://doi.org/10.1088/1674-1056/ad5f86","url":null,"abstract":"The realization of 100% polarized topological Weyl fermions in half-metallic ferromagnets is of particular importance for fundamental research and spintronic applications. Here, we theoretically investigate the electronic and topological properties of the zinc-blende compound VAs, which was deemed as a half-metallic ferromagnet related to dynamic correlations. Based on the combination of density functional theory and dynamical mean field theory, we uncover that the half-metallic ferromagnet VAs exhibits attractive Weyl semimetallic behaviors which are very close to the Fermi level in the DFT + <italic toggle=\"yes\">U</italic> regime with effect <italic toggle=\"yes\">U</italic> values ranging from 1.5 eV to 2.5 eV. Meanwhile, we also investigate the magnetization-dependent topological properties; the results show that the change of magnetization directions only slightly affects the positions of Weyl points, which is attributed to the weak spin–orbital coupling effects. The topological surface states of VAs projected on semi-infinite (001) and (111) surfaces are investigated. The Fermi arcs of all Weyl points are clearly visible on the projected Fermi surfaces. Our findings suggest that VAs is a fully spin-polarized Weyl semimetal with many-body correlated effects in the effective <italic toggle=\"yes\">U</italic> values range from 1.5 eV to 2.5 eV.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142209318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

A solution method for decomposing vector fields in Hamilton energy 分解汉密尔顿能量矢量场的求解方法

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-08-01 DOI: 10.1088/1674-1056/ad5a74

Xin Zhao, Ming Yi, Zhou-Chao Wei, Yuan Zhu, Lu-Lu Lu

引用次数: 0

Effect of distribution of fines on evolution of cooperation in spatial public goods game 罚款分配对空间公共产品博弈中合作演变的影响

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-08-01 DOI: 10.1088/1674-1056/ad5aee

Xing-Ping Sun, Yan-Zheng Bi, Hong-Wei Kang, Yong Shen, Qing-Yi Chen

{"title":"Effect of distribution of fines on evolution of cooperation in spatial public goods game","authors":"Xing-Ping Sun, Yan-Zheng Bi, Hong-Wei Kang, Yong Shen, Qing-Yi Chen","doi":"10.1088/1674-1056/ad5aee","DOIUrl":"https://doi.org/10.1088/1674-1056/ad5aee","url":null,"abstract":"In the realm of public goods game, punishment, as a potent tool, stands out for fostering cooperation. While it effectively addresses the first-order free-rider problem, the associated costs can be substantial. Punishers incur expenses in imposing sanctions, while defectors face fines. Unfortunately, these monetary elements seemingly vanish into thin air, representing a loss to the system itself. However, by virtue of the redistribution of fines to cooperators and punishers, not only can we mitigate this loss, but the rewards for these cooperative individuals can be enhanced. Based upon this premise, this paper introduces a fine distribution mechanism to the traditional pool punishment model. Under identical parameter settings, by conducting a comparative experiment with the conventional punishment model, the paper aims to investigate the impact of fine distribution on the evolution of cooperation in spatial public goods game. The experimental results clearly demonstrate that, in instances where the punishment cost is prohibitively high, the cooperative strategies of the traditional pool punishment model may completely collapse. However, the model enriched with fine distribution manages to sustain a considerable number of cooperative strategies, thus highlighting its effectiveness in promoting and preserving cooperation, even in the face of substantial punishment cost.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142209301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Bose–Einstein distribution temperature features of quasiparticles around magnetopolaron in Gaussian quantum wells of alkali halogen ions 碱卤离子高斯量子阱中磁极子周围准粒子的玻色-爱因斯坦分布温度特征

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-08-01 DOI: 10.1088/1674-1056/ad5c3c

Xin Zhang, 仁高娃 Sarengaowa, Shuang Han, Ran An, Xin-Xue Zhang, Xin-Ying Ji, Hong-Xu Jiang, Xin-Jun Ma, Pei-Fang Li, Yong Sun

引用次数: 0