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Dirac oscillator in the near-horizon region of BTZ black hole BTZ 黑洞近视界区的狄拉克振荡器
Europhysics Letters Pub Date : 2024-03-04 DOI: 10.1209/0295-5075/ad2ff5
A. Guvendi, Faizuddin Ahmed
{"title":"Dirac oscillator in the near-horizon region of BTZ black hole","authors":"A. Guvendi, Faizuddin Ahmed","doi":"10.1209/0295-5075/ad2ff5","DOIUrl":"https://doi.org/10.1209/0295-5075/ad2ff5","url":null,"abstract":"\u0000 In this paper, we explore the evolution of a Dirac oscillator (DO) field within the near-horizon region of the Banados, Teitelboim, and Zanelli (BTZ) black hole (BH) by seeking exact solutions to the corresponding DO equation. We obtain the relativistic frequency expression and analyze impact of various parameters implicated in it. Our findings reveal that the damped mode of this fermionic oscillator field relies on the BH mass, spin of the fermionic field, and frequency of the oscillator field. Lastly, we focus into the quantum system for a zero oscillator frequency as a specific case and thoroughly analyze the obtained results.","PeriodicalId":503117,"journal":{"name":"Europhysics Letters","volume":"101 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140079935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hydrogen sensor based on surface plasmon polaritons in palladium layer structure 基于钯层结构表面等离子体极化子的氢传感器
Europhysics Letters Pub Date : 2024-03-04 DOI: 10.1209/0295-5075/ad2ff8
Yinqiao Li, Yunfei Zou, Hongbin Jin, Zilin Lu, Song Wang, Gang Song
{"title":"Hydrogen sensor based on surface plasmon polaritons in palladium layer structure","authors":"Yinqiao Li, Yunfei Zou, Hongbin Jin, Zilin Lu, Song Wang, Gang Song","doi":"10.1209/0295-5075/ad2ff8","DOIUrl":"https://doi.org/10.1209/0295-5075/ad2ff8","url":null,"abstract":"\u0000 We design a new hydrogen (H2) sensor composed of palladium (Pd) layer structure. Pd can absorb H2 and turns to Pd-H. The dielectric constant of Pd is totally different from the one of Pd-H. By calculating the propagation length of the layer structure, we find that the difference of the propagation lengths between the structure with Pd and the structure with Pd-H reaches to be as ten times as the wavelength in a certain condition. With the number of the layers increasing, another new mode appears and the dissipation of our proposed structure also linearly increases. There is a worst number of the layers that the difference of the propagation lengths is the shortest. This shows the competition between the dissipation of the structure and the coupling of surface plasmon polaritons among the layers. Our proposed has a large difference of propagation lengths and is quite sensitive to H2, which can be used as a hydrogen sensor.","PeriodicalId":503117,"journal":{"name":"Europhysics Letters","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140265925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The controlled SWAP test for entanglement of mixed quantum states 混合量子态纠缠的受控 SWAP 检验
Europhysics Letters Pub Date : 2024-03-02 DOI: 10.1209/0295-5075/ad2f5a
Rui-Qi Zhang, Yue-Di Qu, Shuqian Shen, Ming Li, Jing Wang
{"title":"The controlled SWAP test for entanglement of mixed quantum states","authors":"Rui-Qi Zhang, Yue-Di Qu, Shuqian Shen, Ming Li, Jing Wang","doi":"10.1209/0295-5075/ad2f5a","DOIUrl":"https://doi.org/10.1209/0295-5075/ad2f5a","url":null,"abstract":"\u0000 Quantum entanglement as a resource plays a key role in the field of quantum computing and quantum communication. The controlled SWAP test has been used to detect pure state entanglement [S. Foulds, V. Kendon, T. Spiller, Quantum Sci. Technol. 6, 035002 (2021); J. L. Beckey, N. Gigena, P. J. Coles, Phys. Rev. Lett. 127, 140501 (2021)]. In this paper, we investigate that quantum circuits for the controlled SWAP test can be used to detect the entanglement of multipartite mixed state. Based on the measured probability of the quantum circuits, we propose entanglement criteria for detecting multipartite entanglement and genuine entanglement of pure states. In addition, we give representation of the entanglement measures based on the measured probability of the controlled SWAP tests. Numerical examples are used to illustrate the efficiency of the entanglement criteria.","PeriodicalId":503117,"journal":{"name":"Europhysics Letters","volume":"34 41","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140081738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Collision frequency measurement from optical reflectivity of laser indirect-driven CH/Al/Diamond 通过激光间接驱动 CH/Al/Diamond 的光学反射率测量碰撞频率
Europhysics Letters Pub Date : 2024-02-28 DOI: 10.1209/0295-5075/ad2e78
Zhiyu Zhang, Yong Hou, Yang Zhao, Jiyan Zhang, Tao Xu, L. Jing, Bo Qing, Gang Xiong, M. Lv, Feng Wang, Huabing Du, Xiayu Zhan, T. Song, Chengwu Huang, Tuo Zhu, Yuxue Zhang, Yan Zhao, Lu Zhang, Liling Li, Jiamin Yang
{"title":"Collision frequency measurement from optical reflectivity of laser indirect-driven CH/Al/Diamond","authors":"Zhiyu Zhang, Yong Hou, Yang Zhao, Jiyan Zhang, Tao Xu, L. Jing, Bo Qing, Gang Xiong, M. Lv, Feng Wang, Huabing Du, Xiayu Zhan, T. Song, Chengwu Huang, Tuo Zhu, Yuxue Zhang, Yan Zhao, Lu Zhang, Liling Li, Jiamin Yang","doi":"10.1209/0295-5075/ad2e78","DOIUrl":"https://doi.org/10.1209/0295-5075/ad2e78","url":null,"abstract":"\u0000 A collision frequency measurement from the optical reflectivity of laser indirect driven CH/Al/Diamond on the SG-10kJ laser facility is presented. The optical reflectivity and the Al/diamond interface velocity were measured simultaneously by the velocity interferometer. The aluminum rear surface density was deduced from the interface velocity by analyzing the wave interaction. The deduced sample state was compared with the simulation and quite good agreement was found. The electron collision frequency was deduced by fitting the sample state to the optical reflectivity, and it is found that the experimental collision frequency agrees with a semi-empirical result within the error bar, but is larger than the simulated result based on the average-atom model with the hypernetted chain approximation.","PeriodicalId":503117,"journal":{"name":"Europhysics Letters","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140421363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Relativistic energy density functional from momentum space to coordinate space within a coherent density fluctuation model 相干密度波动模型中从动量空间到坐标空间的相对论能量密度函数
Europhysics Letters Pub Date : 2024-02-27 DOI: 10.1209/0295-5075/ad2d86
Praveen K. Yadav, Raj Kumar, M. Bhuyan
{"title":"Relativistic energy density functional from momentum space to coordinate space within a coherent density fluctuation model","authors":"Praveen K. Yadav, Raj Kumar, M. Bhuyan","doi":"10.1209/0295-5075/ad2d86","DOIUrl":"https://doi.org/10.1209/0295-5075/ad2d86","url":null,"abstract":"\u0000 In this theoretical study, we have derived a simplified analytical expression for the binding energy per nucleon as a function of density and isospin asymmetry within the relativistic mean-field model. We have generated a new parameterization for the density-dependent DD-ME2 parameter set using the Relativistic-Hartree-Bogoliubov approach. Moreover, this work attempts to revisit the prior polynomial fitting in [Phy. Rev. C {bf 103}, 024305 (2021)] for the non-linear NL3 force parameter to provide a simplified set of equations for the energy density functional which is used for calculating the surface properties of finite nuclei. The current study improves the existing fitting procedure by effectively proposing a simpler model that provides comparably precise results while lowering the computational expense. To study the surface properties of finite nuclei with these parameterizations, we have adopted the coherent density fluctuation model, which effectively translates the quantities of nuclear matter from momentum space to coordinate space at local density. The isospin properties, such as symmetry energy and its surface and volume components, slope parameter, finite nuclear incompressibility, and surface incompressibility for even-even nuclei, are calculated for different mass regions. Moreover, we have studied the effect of density, weight function, and choice of relativistic force parameters on the surface properties. The consequence of this work will help to determine the properties of nuclei along the nuclear landscape and can facilitate an improved understanding of the island of stability, heavy-ion collision, and nucleosynthesis, among others.","PeriodicalId":503117,"journal":{"name":"Europhysics Letters","volume":"57 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140424039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Critical behavior in the Mn5Ge3 ferromagnet Mn5Ge3 铁磁体的临界行为
Europhysics Letters Pub Date : 2024-02-27 DOI: 10.1209/0295-5075/ad2d87
Jun-Fa lin, Huan Wang, Sheng Xu, Xiao-Yan Wang, Xiangtao Zeng, Zhengsheng Dai, Jing Gong, Kun Han, Yi-Ting Wang, Xiao Ma, Tian-Long Xia
{"title":"Critical behavior in the Mn5Ge3 ferromagnet","authors":"Jun-Fa lin, Huan Wang, Sheng Xu, Xiao-Yan Wang, Xiangtao Zeng, Zhengsheng Dai, Jing Gong, Kun Han, Yi-Ting Wang, Xiao Ma, Tian-Long Xia","doi":"10.1209/0295-5075/ad2d87","DOIUrl":"https://doi.org/10.1209/0295-5075/ad2d87","url":null,"abstract":"\u0000 High-Curie-temperature ferromagnets are promising candidates for designing new spintronic devices. Here we have successfully synthesized the single crystal of the itinerant ferromagnet Mn5Ge3 using flux method. Its critical properties were investigated by means of bulk dc-magnetization at the boundary of the paramagnetic (PM) and ferromagnetic (FM) phase to determine intrinsic magnetic interactions. Critical exponents β = 0.336 0.001 with a critical temperature Tc = 300.29 0.01 K and γ = 1.193 0.003 with Tc = 300.15 0.05 K are acquired by the modified Arrott plot, whereas δ = 4.61 0.03 is deduced by a critical isotherm analysis at Tc = 300 K. The self-consistency and reliability of these critical exponents are verified by the Widom scaling law and the scaling equations. Further analysis reveals that the spin interaction in Mn5Ge3 exhibits three-dimensional Ising-like behavior. The magnetic exchange interaction is found to decay as J(r) r-4.855, meaning that the spin interactions exceed the nearest neighbors, which may be related to the different Mn–Mn interactions with inequal exchange strengths.","PeriodicalId":503117,"journal":{"name":"Europhysics Letters","volume":"57 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140425660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of rainbow gravity on an electron confined to a triangular well and a periodic potential 彩虹引力对限制在三角井和周期势中的电子的影响
Europhysics Letters Pub Date : 2024-02-26 DOI: 10.1209/0295-5075/ad2d16
K. Bakke, C. R. Muniz
{"title":"Effects of rainbow gravity on an electron confined to a triangular well and a periodic potential","authors":"K. Bakke, C. R. Muniz","doi":"10.1209/0295-5075/ad2d16","DOIUrl":"https://doi.org/10.1209/0295-5075/ad2d16","url":null,"abstract":"\u0000 We investigate quantum effects concerning the modification of the background via rainbow gravity on an electron. We employ the nonrelativistic approximation of the Dirac equation to analyze these effects in depth. We initially study the interaction between an electron and a uniform electric field, by exploring confinement of the particle to a triangular potential well. We find systematic alterations in the energy levels reliant on the rainbow parameter $epsilon$. Additionally, we investigate a particle in a periodic potential resembling a ring. We also find consistent alterations in energy levels due to changes in the background via rainbow functions. As in the previously analyzed scenario, as larger the rainbow parameter the lower the obtained energy levels. These findings underscore a systematic influence of modified gravity on particle dynamics in quantum scenarios.","PeriodicalId":503117,"journal":{"name":"Europhysics Letters","volume":"127 S191","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140429320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synchronization on higher-order networks 高阶网络上的同步
Europhysics Letters Pub Date : 2024-02-23 DOI: 10.1209/0295-5075/ad2cb6
Haoran Liu, Jin Zhou, Bo Li, Meng Huang, Jun-an Lu, Dinghua Shi
{"title":"Synchronization on higher-order networks","authors":"Haoran Liu, Jin Zhou, Bo Li, Meng Huang, Jun-an Lu, Dinghua Shi","doi":"10.1209/0295-5075/ad2cb6","DOIUrl":"https://doi.org/10.1209/0295-5075/ad2cb6","url":null,"abstract":"\u0000 Network science has already been fruitful and confirmed effective on the description of real-world or abstract systems. An increasing number of researches and instances have successfully verified, however, that interactions in systems may occur among three, four, or even more components. The introduction of higher-order perspective brings an revolution on network science, and refreshes researchers’ understanding of synchronization. Hence, an overview is presented here in regard of synchronization on higher-order networks. We start from an introduction of how the higher-order networks are represented using algebraic tools. Then a series of landmark researches on synchronization are reviewed under circumstances of whether or not the dynamics contains control. Finally, we summarize our conclusions and propose our outlooks on expectations of future works.","PeriodicalId":503117,"journal":{"name":"Europhysics Letters","volume":"2 9‐10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140436131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of plastic deformation with variable ultrasonic excitation positions 利用可变超声波激励位置测定塑性变形
Europhysics Letters Pub Date : 2024-02-23 DOI: 10.1209/0295-5075/ad2cb5
Frank Mevissen
{"title":"Determination of plastic deformation with variable ultrasonic excitation positions","authors":"Frank Mevissen","doi":"10.1209/0295-5075/ad2cb5","DOIUrl":"https://doi.org/10.1209/0295-5075/ad2cb5","url":null,"abstract":"\u0000 For highly stressed mechanical components, the information about a beginning plastic deformation is of enormous importance. Therefore, nondestructive testing and structural health monitoring techniques are essential to examine components and to make statements about the mechanical integrity. In this work, the dislocation theory was extended and combined with ultrasonic wave excitation to obtain a dislocation description in isotropic materials. In the analytical derivation, the ultrasonic longitudinal waves were sent at different angles of attack relative to the uniaxial tensile load. The derived nonlinearity coefficients enabled the investigation as a function of these angles. The evaluated coefficient behaviour allows statements about the position of the ultrasonic excitation relative to the tensile load. Furthermore, a signature could be derived from which the degree of plasticity can be determined if a reference measurement is available. The newly derived coefficients and their behaviour make it possible to efficiently detect the beginning plastic deformation and to predict the position of the applied load vector.","PeriodicalId":503117,"journal":{"name":"Europhysics Letters","volume":"17 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140437718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Computational study of stability, photovoltaic, and thermoelectric properties of new inorganic lead-free halide perovskites 新型无机无铅卤化物包晶的稳定性、光伏和热电特性的计算研究
Europhysics Letters Pub Date : 2024-02-23 DOI: 10.1209/0295-5075/ad2cb7
M. Agouri, H. Ouhenou, A. Waqdim, A. Zaghrane, E. Darkaoui, A. Abbassi, B. Manaut, Souad Taj, M. Driouich
{"title":"Computational study of stability, photovoltaic, and thermoelectric properties of new inorganic lead-free halide perovskites","authors":"M. Agouri, H. Ouhenou, A. Waqdim, A. Zaghrane, E. Darkaoui, A. Abbassi, B. Manaut, Souad Taj, M. Driouich","doi":"10.1209/0295-5075/ad2cb7","DOIUrl":"https://doi.org/10.1209/0295-5075/ad2cb7","url":null,"abstract":"\u0000 Due to their rich and extraordinary properties, halide perovskites have gained attention over time for their applications in thermoelectric and solar cells. Here, several physicalproperties (stability, photovoltaic, and thermoelectric) of inorganic halide perovskites XZnI3(X = Na; K; Rb; Cs) are predicted using the density functional theory (DFT) within the Wien2k code. The optimization of structural parameters have been calculated using PBE-GGA approach. The tolerance factor, Born criteria, phonon dispersion, and negative formation energy show the formation and stability of these studied materials in the ideal cubic structure. Additionally, the modified Becke-Johnson method is applied for optoelectronic and transport properties. All compounds exhibit the nature of indirect band gap semiconductors with better absorption in the visible and ultraviolet regions ($>10^5 cm^{1}$). The transport properties present high electrical conductivity, large Seebeck coefficient, and good (PF, ZT) factors for all these materials. Finally, all these properties of inorganic halide perovskites open up new possibilities for efficient applications in thermoelectric and solar cells.","PeriodicalId":503117,"journal":{"name":"Europhysics Letters","volume":"38 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140435955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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