Canadian Journal of Physics最新文献

Potential energy surface and quantum dynamics calculation of SH2-(2A′) based on ab initio scaled external correlation correction 基于 ab initio 比例外部相关性校正的 SH2-(2A′)势能面和量子动力学计算

IF 1.2 4区物理与天体物理

Canadian Journal of Physics Pub Date : 2023-12-15 DOI: 10.1139/cjp-2023-0176

Hongyu Ma, Ning Gu

引用次数: 0

Vortices in multilayer stacks of Bose–Einstein condensates with tilted dipoles 具有倾斜偶极子的多层玻色-爱因斯坦凝聚物堆栈中的漩涡

IF 1.2 4区物理与天体物理

Canadian Journal of Physics Pub Date : 2023-12-12 DOI: 10.1139/cjp-2023-0095

Qiang Zhao

{"title":"Vortices in multilayer stacks of Bose–Einstein condensates with tilted dipoles","authors":"Qiang Zhao","doi":"10.1139/cjp-2023-0095","DOIUrl":"https://doi.org/10.1139/cjp-2023-0095","url":null,"abstract":"In this paper, we consider the formation of vortices in multilayer stacks of Bose–Einstein condensates with tilted dipoles by numerical simulations of the Gross–Pitaevskii equation. Different dependencies of critical rotation frequency (CRF) and optical lattice height, vortex number, and rotation frequency are studied, depending on the direction of the dipole axis and dipole strength. Our results show that the CRF in z = 0 is minimum. When the optical lattice height is gradually increased, the CRF decreases gradually. Reducing of dipole strength in anisotropic dipole–dipole interaction (DDI) favours the formation of vortices, and such decline in isotropic DDI hinders the creation of vortices. The reason for this difference is that the repulsive interaction is favorable and the attractive interaction is disadvantageous for the vortex formation. In addition, we study the first-order correlation function and focus on variation of coherence. For small rotation frequency, the break of coherence occurs earlier in the case of purely repulsive interaction. With an increase in rotation frequency, the coherence concurrently disappears in layer z = 2. Moreover, we also investigate the quenched dynamics, showing that the increase of angular momentum is induced by changing the direction of dipoles and in this process the vortex number remains unchanged.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"35 10","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139009887","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

f(G,T) and its Cosmological Implications f(G,T)及其宇宙学意义

4区物理与天体物理

Canadian Journal of Physics Pub Date : 2023-11-10 DOI: 10.1139/cjp-2023-0200

Z. Yousaf, M.Z. Bhatti, Timothy Ganesan Andrew, H. Aman

引用次数: 0

Détermination des propriétés thermodynamiques d’un plasma d’air contaminé par de la vapeur d’alliage AgSnO2 AgSnO2合金蒸汽污染空气等离子体热力学性质的测定

4区物理与天体物理

Canadian Journal of Physics Pub Date : 2023-11-10 DOI: 10.1139/cjp-2023-0052

Adijgkiga BANOUGA, Abdoul Karim KAGONE, Wêpari Charles YAGUIBOU, Niéssan KOHIO, Zacharie Koalaga, François ZOUGMORE

{"title":"Détermination des propriétés thermodynamiques d’un plasma d’air contaminé par de la vapeur d’alliage AgSnO2","authors":"Adijgkiga BANOUGA, Abdoul Karim KAGONE, Wêpari Charles YAGUIBOU, Niéssan KOHIO, Zacharie Koalaga, François ZOUGMORE","doi":"10.1139/cjp-2023-0052","DOIUrl":"https://doi.org/10.1139/cjp-2023-0052","url":null,"abstract":"Le succès ou l'échec de la coupure du courant électrique par le disjoncteur dépend fortement des propriétés physico-chimiques de l'arc électrique créé. Dans ce travail, nous nous intéressons aux propriétés thermodynamiques du plasma d’air contaminé par de la vapeur d’alliage d'argent et de dioxyde d'étain. Il s’agit notamment de la masse volumique, de la vitesse du son dans le plasma, de l’enthalpie massique, de la densité d’énergie et de la densité de flux thermique. Elles sont déterminées à l’équilibre thermodynamique dans une gamme de température de 500 K à 20000 K et à la pression atmosphérique. Les résultats obtenus montrent que, pour une même température donnée, la masse volumique augmente lorsque la vapeur d’alliage d’argent et de dioxyde d’étain augmente dans le mélange. La vitesse du son dans le plasma et la capacité calorifique diminuent lorsque la vapeur d’alliage AgSnO2 augmente dans le mélange. Pour une même température donnée, l’enthalpie massique diminue entre 3000 K et 20000 K, avec l’augmentation de vapeur d’alliage AgSnO2. La densité d’énergie et la densité de flux thermique diminuent entre 10000 K et 20000 K, lorsque la vapeur d’alliage AgSnO2 augmente dans le mélange. L’augmentation du pourcentage de la vapeur de contact électrique en AgSnO2, ralentit l’extinction de l’arc électrique créé à l’intérieur du disjoncteur, surtout au-delà de 0,1% de vapeur. Ce ralentissement de l’extinction de l’arc électrique peut entraîner un échec de coupure de courant électrique par le disjoncteur et donc détériorer les performances du disjoncteur à air.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"84 13","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135092260","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

Bianchi type-III THDE quintessence model with hybrid scale factor Bianchi - iii型混合尺度因子THDE精萃模型

4区物理与天体物理

Canadian Journal of Physics Pub Date : 2023-11-08 DOI: 10.1139/cjp-2023-0201

Gunjan Varshney, Anirudh Pradhan, Umesh Kumar Sharma

{"title":"Bianchi type-III THDE quintessence model with hybrid scale factor","authors":"Gunjan Varshney, Anirudh Pradhan, Umesh Kumar Sharma","doi":"10.1139/cjp-2023-0201","DOIUrl":"https://doi.org/10.1139/cjp-2023-0201","url":null,"abstract":"The current research investigates the behavior of the Tsallis holographic dark energy (THDE) model with quintessence in a homogeneous and anisotropic Bianchi type-III (B-III) space-time. We construct the model by using two conditions (i) expansion scalar (theta) is proportionate to shear scalar (sigma) in the model and (ii) hybrid {color{blue} scale factor} a = t^beta e^{gamma t}, where beta>0, gamma>0 are constants. Our study is based on Type Ia supernovae (SNIa) data in combination with CMB and BAO observations (Giostri et al, JCAP 3, 27 (2012), arXiv:1203.3213v2[astro-ph.CO]), the present values of Hubble constant and deceleration parameter are H_{0} = 73.8 and q_{0} = -0.54 respectively. Compiling our theoretical models with this data, we obtain beta = 2.1445~ & ~ 2.1154 for gamma = 0.5 ~ & ~ 1 respectively. We completed an entirely novel form of cosmic model where the expansion occurs during the present accelerated phase for the constraints. We have discussed the conformity among the scalar field model of quintessence and THDE model. To understand the Universe, we have also established the relations for Distance modulus, Luminosity distance, and Angular-diameter distance. Some geometric and physical aspects of the THDE model are also highlighted.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135340721","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

Binding Properties of Some Alkali Metal Vapors: Specifically Lithium-7 (7Li), Soduim-23 (23Na) and Potassium-39 (39K) 一些碱金属蒸气的结合特性:特别是锂-7 (7Li)、钠-23 (23Na)和钾-39 (39K)

4区物理与天体物理

Canadian Journal of Physics Pub Date : 2023-11-02 DOI: 10.1139/cjp-2023-0136

Humam B. Ghassib, Anoud H. Al-Aoon, Ayman S. Sandouqa

引用次数: 0

On the electron impact cross-section maxima for dissociative and non-dissociative single ionization of molecules and radicals 解离和非解离分子和自由基单电离的电子冲击截面最大值

4区物理与天体物理

Canadian Journal of Physics Pub Date : 2023-11-02 DOI: 10.1139/cjp-2023-0217

Antonio Carlos Fontes dos Santos

引用次数: 0

Experimental and Theoretical studies on improving efficiency of ZnO based Dye-sensitized solar cells using Single layer Anti-reflective coating 单层增透涂层提高ZnO基染料敏化太阳能电池效率的实验与理论研究

4区物理与天体物理

Canadian Journal of Physics Pub Date : 2023-11-02 DOI: 10.1139/cjp-2023-0171

M. Ismail Fathima, J.R. Sofia, K.S. Joseph Wilson

引用次数: 0

Some Three and n-component Waves in Porous media 多孔介质中的三分量波和n分量波

4区物理与天体物理

Canadian Journal of Physics Pub Date : 2023-10-26 DOI: 10.1139/cjp-2023-0049

T.J.T Spanos

{"title":"Some Three and n-component Waves in Porous media","authors":"T.J.T Spanos","doi":"10.1139/cjp-2023-0049","DOIUrl":"https://doi.org/10.1139/cjp-2023-0049","url":null,"abstract":"Based on experimental results and self-consistent physical theory, a three-component description of nonlinear body waves in porous media is constructed. Applications of this result to two component fluid flow in dynamic porous media and seismic wave propagation in multiphase porous media are presented. This description is important to petroleum reservoir simulation, groundwater hydrology and seismic analysis of the earth. The two-body analogue of these results has been shown, in the past, to be inconsistent with the two body linear models currently used by petroleum engineers and groundwater hydrologists. In seismic theory simple linear models are generally used and much of the information obtained from the theory presented here is referred to as noise. The processes observed and described here have been patented and applied commercially to oil production and groundwater remediation. It is shown here that even if the correct nonlinear equations are used, three-component wave descriptions of porous media cannot be constructed solely from the equations of motion for the components. This is because of the introduction of the complexity of multiple scales into this non-linear field theory. Information about the coupling between the components is required to obtain a physical description. It is observed that the fields must be coupled in phase and out of phase and this result is consistent with the description of three and n-body gravitational fields in Newtonian gravity and General Relativity.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"22 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136377292","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 Dedicated Application of Evolutionary Algorithms: Synchrotron X-ray Radiation Optimization based on an in-vacuum Undulator 进化算法的专用应用:基于真空波动器的同步加速器x射线辐射优化

4区物理与天体物理

Canadian Journal of Physics Pub Date : 2023-10-26 DOI: 10.1139/cjp-2023-0078

Bora Ketenoglu, Erkan Bostanci, Didem Ketenoglu, Ali Can Canbay, Manuel Harder, Adnan Sahin Karaca, Engin Eren, Ayhan Aydin, Zhong Yin, Mehmet Serdar Guzel, Michael Martins

{"title":"A Dedicated Application of Evolutionary Algorithms: Synchrotron X-ray Radiation Optimization based on an in-vacuum Undulator","authors":"Bora Ketenoglu, Erkan Bostanci, Didem Ketenoglu, Ali Can Canbay, Manuel Harder, Adnan Sahin Karaca, Engin Eren, Ayhan Aydin, Zhong Yin, Mehmet Serdar Guzel, Michael Martins","doi":"10.1139/cjp-2023-0078","DOIUrl":"https://doi.org/10.1139/cjp-2023-0078","url":null,"abstract":"Following the rapid growth in accelerator-based light sources research since the mid of 20th century, miscellaneous 3rd generation Synchrotron Radiation (SR) facilities such as SSRL, APS, ESRF, PETRA-III and SPring-8 have come into existence. These SR source facilities provide 10^20 to 10^25 photons/s/mrad^2/mm^2/0.1%BW peak brightness within the photon energy range of 10-10^5 eV. Since different measurement techniques are utilized at X-ray beamlines of SR facilities, many kinds of Insertion Devices (i.e. undulators and wigglers) and optical components (e.g. High Resolution Monochromators (HRM), Double Crystal Monochromators (DCM), lenses, mirrors etc.) are employed for each experimental setup as a matter of course. Under the circumstances, optimization of a synchrotron beamline is a big concern for many scientists to ensure required radiation characteristics (i.e. photon flux, spot size, photon energy etc.) for dedicated user experiments. In this respect, an in-vacuum hybrid undulator driven by a 6 GeV synchrotron electron beam, is optimized using Evolutionary Algorithms (EA). Finally, it is shown that EA results are well-consistent with both the literature and the analytical calculations, resulting in a promising design estimation for beamline scientists.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134907161","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