发布求助
文献互助 智能选刊 最新文献

Canadian Journal of Physics最新文献

筛选
英文 中文
Chaotic Inflationary Universe in Rastall Gravity 暗物质引力下的混沌暴胀宇宙
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2023-06-23 DOI: 10.1139/cjp-2023-0114
Priyanka Mandal, B. C. Paul
{"title":"Chaotic Inflationary Universe in Rastall Gravity","authors":"Priyanka Mandal, B. C. Paul","doi":"10.1139/cjp-2023-0114","DOIUrl":"https://doi.org/10.1139/cjp-2023-0114","url":null,"abstract":"We study Linde's chaotic inflation in Rastall gravity with a homogeneous scalar field. In Einstein's general theory of relativity (GR) Linde obtained chaotic scenario which emerged from chaotic distribution of scalar field satisfying a limiting value of the initial scalar field phi_o > 3 M_P which lies in the quantum gravity. The upper limit on the initial scalar field is obtained for a sufficient inflation to encompass the present universe. In the Rastall gravity the upper limit is reduced depending on the Rastall parameter gamma <1. The upper limit on phi_o is found to increases for 1<gamma <frac{3}{2}. In the later case sufficient inflation is not permitted and the role of curvaton field is explored for an acceptable early chaotic inflation.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82651250","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
Thermal contribution to measured g-factors in alkali atoms 热对碱原子中测量g因子的贡献
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2023-06-23 DOI: 10.1139/cjp-2023-0068
T. Zalialiutdinov, Y. Kozhedub, D. Solovyev
{"title":"Thermal contribution to measured g-factors in alkali atoms","authors":"T. Zalialiutdinov, Y. Kozhedub, D. Solovyev","doi":"10.1139/cjp-2023-0068","DOIUrl":"https://doi.org/10.1139/cjp-2023-0068","url":null,"abstract":"In this paper, we consider a one-loop thermal correction to the g-factors of the ground and low-lying excited states in atomic systems with one valence s electron. As an example, we carried out calculations for Rb and Cs atoms, where optical measurements of transition frequencies set the metrological level of accuracy. With the development of atomic systems as the most accurate tool for spectroscopic experiments, it has become increasingly important to improve the accuracy of measuring the electron g-factor, which is currently at ~10^{-12}. The rapid progress in this field in recent years requires analysis not only of various relativistic, QED and other effects, but also theoretical studies of phenomena stimulated by the external thermal environment. We can expect that the thermal contribution to the g-factor calculated in our work may be of interest in the near future.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72987323","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
First-principle study of the optoelectronic properties of GaxIn1-xBiyP1-y quaternary alloys lattice-matched to InP for telecommunication applications 电信应用中与InP晶格匹配的GaxIn1-xBiyP1-y季元合金光电性能的第一性原理研究
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2023-06-13 DOI: 10.1139/cjp-2022-0331
Malika Tehami, M. Benchehima, Djili Ameur, H. Abid
{"title":"First-principle study of the optoelectronic properties of GaxIn1-xBiyP1-y quaternary alloys lattice-matched to InP for telecommunication applications","authors":"Malika Tehami, M. Benchehima, Djili Ameur, H. Abid","doi":"10.1139/cjp-2022-0331","DOIUrl":"https://doi.org/10.1139/cjp-2022-0331","url":null,"abstract":"In this work, we present a theoretical investigation of the structural and optoelectronic properties of GaxIn1-xBiyP1-y quaternary alloys lattice-matched to InP using the full-potential linearized augmented plane wave approach based on the functional theory of density. The local density approximation (LDA) and the generalized gradient approximation of Wu–Cohen (WC-GGA) have been used for calculating the structural properties of GaxIn1-xBiyP1-y quaternaries. The lattice matching condition and the range of ( x, y) concentrations for which the quaternary alloys are lattice-matched to InP substrate were determined. It is found that the calculated lattice constants of GaxIn1-xBiyP1-y for all selected concentrations ( x, y) are about 5.9 Å, which are in good agreement with the experimental value of the lattice constant of InP (5.869 Å). The electronic property calculations are executed via EV-GGA and TB-mBJ approximations. The calculated band structures show that GaxIn1-xBiyP1-y quaternaries have semiconductor character and exhibit a direct band gap, for all selected concentrations ( x, y). In addition, the optical properties were calculated and discussed in detail. And also, the optical band gaps of quaternaries were determined using Tauc's method. We observed that the GaxIn1-xBiyP1-y quaternaries cover the wavelength ranging from 0.911 to 2.456 µm while maintaining a lattice match to the InP substrate. The obtained results reveal that these quaternaries are suitable candidates for telecommunication applications.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85691689","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
Numerical Simulation Study of Self-driven Microdroplet on Locally Restrictive Discontinuous Wetting Gradient Surface Using Front Tracking Method 局部受限非连续润湿梯度表面自驱动微滴的前沿跟踪数值模拟研究
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2023-06-13 DOI: 10.1139/cjp-2023-0009
Ying Zhang, Ruifeng Gao, Yuwei Tu, Yichen Huang, Zhaoqing Ke
{"title":"Numerical Simulation Study of Self-driven Microdroplet on Locally Restrictive Discontinuous Wetting Gradient Surface Using Front Tracking Method","authors":"Ying Zhang, Ruifeng Gao, Yuwei Tu, Yichen Huang, Zhaoqing Ke","doi":"10.1139/cjp-2023-0009","DOIUrl":"https://doi.org/10.1139/cjp-2023-0009","url":null,"abstract":"The motion of droplet on surface with discontinuous wetting gradient is of great importance for understanding lab-on-a-chip systems and other microfluidic devices. Different wetting gradients are known to be the main influencing factor in the droplet self- driven process, but the effect of different wall structures on the droplet migration process also deserves further investigation. In this paper, we analyze the self-driven process of liquid droplets on a local wetting gradient surface under microgravity conditions using front tracking method. The effects of different driving stripe lengths L_ΙΙx^*, different restrictive stripe lengths L_ΙΙΙy^*, and different surface wetting gradients ∆ cos⁡θ on the droplet migration process and droplet morphology are analyzed. A theoretical formula that can predict the lateral spreading length of droplets is also proposed. The results show that different driving stripe length L_ΙΙx^* lengths and the wetting gradient ∆ cos⁡θ have significant effects on the migration velocity of droplets, while different restrictive stripe length L_ΙΙΙy^* lengths have very significant effects on the final morphological characteristics of droplets. When restrictive stripe length L_ΙΙΙy^*≥1, the hindering effect generated by the restrictive region ΙΙΙ has more and more significant effects on the morphological structure of droplets in the migration process. When the correction factor ε=0.735 in the prediction equation, the predicted value calculated by the theoretical equation has a good degree of similarity with the numerical simulation results.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82000372","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
Kβ to Kα X-ray intensity ratio and K-L vacancy transfer probability of Mn following electron capture decay 电子俘获衰变后Mn的Kβ与Kα x射线强度比和K-L空位转移概率
4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2023-06-12 DOI: 10.1139/cjp-2023-0080
S.B. Gudennavar, S.G. Bubbly
{"title":"Kβ to Kα X-ray intensity ratio and K-L vacancy transfer probability of Mn following electron capture decay","authors":"S.B. Gudennavar, S.G. Bubbly","doi":"10.1139/cjp-2023-0080","DOIUrl":"https://doi.org/10.1139/cjp-2023-0080","url":null,"abstract":"K α and K β X-rays of Mn following electron capture (EC) decay of 55 Fe were detected using Amptek XR-100 T-CdTe X-ray detector spectrometer. Measured K α and K β X-ray intensities of Mn were used to determine the K β to K α intensity ratio and total K–L total vacancy transfer probability. These values were compared with the theoretical, semiempirical, and others’ experimental values obtained via EC decay as well as photoionization. The X-ray intensity ratio of Mn was found to be higher by 1.5% from the relativistic Hartree-Slater theoretical value. This deviation may be attributed to the exchange interactions occurring between the 3p and 3d shell electrons as well as the recoil effect of the nucleus due to neutrino emission.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136261129","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
Exact analytical results for the electrostatic potential due to a uniformly charged finite rectangular plate 均匀带电有限矩形板的静电势的精确分析结果
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2023-06-12 DOI: 10.1139/cjp-2023-0091
O. Ciftja, Brent Ciftja
{"title":"Exact analytical results for the electrostatic potential due to a uniformly charged finite rectangular plate","authors":"O. Ciftja, Brent Ciftja","doi":"10.1139/cjp-2023-0091","DOIUrl":"https://doi.org/10.1139/cjp-2023-0091","url":null,"abstract":"We explain a general mathematical method that allows one to calculate the electrostatic potential created by a uniformly charged rectangular plate with arbitrary length and width at an arbitrary point in space. Exact analytical results for the electrostatic potential due to a uniformly charged finite rectangular plate are shown for special cases in order to illustrate the implementation of the formalism. Results of this nature are very important to various problems in physical sciences, applied mathematics and potential theory.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73152978","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
Evolutionary phases of the accelerating universe in modified gravity and its solar system test 修正重力下加速宇宙的演化阶段及其太阳系测试
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2023-06-07 DOI: 10.1139/cjp-2023-0090
Tame Achi, H. S. Singh
{"title":"Evolutionary phases of the accelerating universe in modified gravity and its solar system test","authors":"Tame Achi, H. S. Singh","doi":"10.1139/cjp-2023-0090","DOIUrl":"https://doi.org/10.1139/cjp-2023-0090","url":null,"abstract":"Einstein’s gravity is modified to explain an accelerating universe’s present and past scenarios by numerically exploring different cosmological parameters. A new f(R) gravity model constrained with coupling constants is introduced in the Einstein-Hilbert action to explain current issues and open up new possibilities in gravity physics by fitting the model with newly collected data from observations. It is proposed that the current universe is undergoing an accelerating expansion which behaves as Chaplygin Gas-type dark energy. The values of the coupling constants involved in f(R) gravity are chosen so that the current value of the effective equation of state (ωeff0) is shown within the observational approximation, that is, between −0.8 and −1.0. Cosmological parameters such as deceleration, cosmic jerk, and snap are consistent with the fundamental observational constraint, and their relevance in terms of coupling constant is also emphasized. The viability of the model as well as the existence and origin of scalaron mass are also investigated.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88320504","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
Quantum Equations of Motion and the Geometrical Imperative II: Relativistic 量子运动方程与几何指令II:相对论性
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2023-06-07 DOI: 10.1139/cjp-2022-0311
R. Henriksen
{"title":"Quantum Equations of Motion and the Geometrical Imperative II: Relativistic","authors":"R. Henriksen","doi":"10.1139/cjp-2022-0311","DOIUrl":"https://doi.org/10.1139/cjp-2022-0311","url":null,"abstract":"We extract the square root of the Minkowski metric using Dirac/Clifford ma- trices. The resulting 4 × 4 operator dS that represents the square root, can be used to transform four vectors between relatively moving observers. This effects the usual Lorentz transformation. In addition it acts on a Dirac bi-spinor. The operator can be used as a Hamiltonian operator to write an equation of motion for a relativistic spinor. This turns out to be the Dirac equation for electrons in standard form, which appears as a transformation of a moving spinor to the rest frame of the spinor. This approach was introduced in paper I of this series for non relativistic spinor particles. We believe that is is a new approach to familiar results.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90441315","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
Nonclassicality versus quantum non-Gaussianity of photon subtracted displaced Fock state 光子减去位移Fock态的非经典性与量子非高斯性
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2023-06-07 DOI: 10.1139/cjp-2023-0085
Deepak, A. Chatterjee
{"title":"Nonclassicality versus quantum non-Gaussianity of photon subtracted displaced Fock state","authors":"Deepak, A. Chatterjee","doi":"10.1139/cjp-2023-0085","DOIUrl":"https://doi.org/10.1139/cjp-2023-0085","url":null,"abstract":"In this paper, a quantitative investigation of the non-classical and quantum non-Gaussian characters of the photon-subtracted displaced Fock state ket{psi}=a^kD(alpha)ket{n}, where k is the number of photons subtracted, n is Fock parameter, is performed by using a collection of measures like Wigner logarithmic negativity, linear entropy potential, skew information based measure, and relative entropy of quantum non-Gaussianity. It is noticed that the number of photons subtracted (k) changes the nonclassicality and quantum non-Gaussianity in a significant amount in the regime of small values of the displacement parameter whereas the Fock parameter (n) presents a notable change in the large regime of the displacement parameter. In this respect, the role of the Fock parameter is found to be stronger as compared to the photon subtraction number. Finally, the Wigner function dynamics considering the effects of photon loss channel is used to show that the Wigner negativity can only be detected by highly efficient detectors.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82107285","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
High School Students perceptions and experiences of using combined RW and Laboratorials to understand Newton’s Laws of Motion 高中生使用联合RW和实验室来理解牛顿运动定律的感知和经验
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2023-06-07 DOI: 10.1139/cjp-2022-0255
Joseph El-Helou, C. Kalman
{"title":"High School Students perceptions and experiences of using combined RW and Laboratorials to understand Newton’s Laws of Motion","authors":"Joseph El-Helou, C. Kalman","doi":"10.1139/cjp-2022-0255","DOIUrl":"https://doi.org/10.1139/cjp-2022-0255","url":null,"abstract":"We discuss the perceptions and experiences of high school students using Reflective Writing and labatorials to attempt to understand Newtonian concepts of force and motion. The sequencing and content of these activities are centered on targeting students’ key difficulties related to forces and motion. Participants are 210 secondary 5 (grade 11) students, from three private schools in Montreal, who took a physics course during 2017-2018 or 2018-2019. Their ideas and opinions about forces and learning physics were investigated, prior to and following the study, with: (a) three questions from the Force Concept Inventory (FCI); (b) a concept map focused on the relations between force and motion. (c) Pre- and post- semi-structured interviews conducted with 12 participants. The gathered data and interviews indicate that the process of combining Labatorials with Reflective Writing improves students’ attitudes towards learning the subject.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72559272","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信