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Hong-Ou-Mandel Interference: A spectral-temporal analysis 洪欧-曼德尔干扰：谱时分析
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2024-04-12 DOI: 10.1139/cjp-2023-0312
Christian Drago, Aggie Branczyk
{"title":"Hong-Ou-Mandel Interference: A spectral-temporal analysis","authors":"Christian Drago, Aggie Branczyk","doi":"10.1139/cjp-2023-0312","DOIUrl":"https://doi.org/10.1139/cjp-2023-0312","url":null,"abstract":"Hong-Ou-Mandel interference is most dramatic when the photons involved are perfectly indistinguishable. Departures from this ideal scenario, however, are also interesting and useful to consider. In this tutorial, we analyze scenarios where the degree of the photons' distinguishability depends on their spectral and temporal ``overlap.'' We first consider photons that are both spectrally pure and spectrally separable. We then generalize this to include spectrally entangled (but still spectrally pure) photons, and spectrally mixed (but still spectrally separable) photons. This tutorial equips researchers with tools for a deeper understanding of this interesting phenomenon and its various applications.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140711855","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
Chiral effective dynamo and torsion type loop holonomy on dislocated Dirac materials 位错狄拉克材料上的手性有效动力和扭转型环整体性
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2024-03-27 DOI: 10.1139/cjp-2023-0057
L.C. Garcia de Andrade
{"title":"Chiral effective dynamo and torsion type loop holonomy on dislocated Dirac materials","authors":"L.C. Garcia de Andrade","doi":"10.1139/cjp-2023-0057","DOIUrl":"https://doi.org/10.1139/cjp-2023-0057","url":null,"abstract":"Relation between Dirac materials and obtainance of chiral effective dynamos in te Burgers torsional dislocation crystals in condensed matter is discussed.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140376941","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
Investigation of optical spectroscopy in W13+ ions. 研究 W13+ 离子的光学光谱。
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2024-03-22 DOI: 10.1139/cjp-2023-0298
Ben Niu, Jihui Chen, Bingli Li, Yizhuo Zhang, Zhang Ling, Ju Meng, Xiao Jun, Yunqin Fu, Ke Yao
{"title":"Investigation of optical spectroscopy in W13+ ions.","authors":"Ben Niu, Jihui Chen, Bingli Li, Yizhuo Zhang, Zhang Ling, Ju Meng, Xiao Jun, Yunqin Fu, Ke Yao","doi":"10.1139/cjp-2023-0298","DOIUrl":"https://doi.org/10.1139/cjp-2023-0298","url":null,"abstract":"This study presents the investigation of magnetic dipole transition lines of W13+ ions in the wavelength range of 200 - 700 nm at a low-energy electron beam ion trap. Seventeen lines emitted from W13+ ions have been observed with three being reported experimentally for the first time. The atomic structure calculation and spectra simulation of W13+ ions have been carried out using the multi-configuration Dirac-Hartree–Fock (MCDHF) method combined with the relativistic configuration interaction (RCI) approach and the collisional-radiative model (CRM), respectively. The theoretical calculations are in reasonable agreement with the experimental observations, and most of the observed lines have been identified.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140211208","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
Generalization of the Thwaites integral method for laminar boundary-layers due to moving continuous surfaces 移动连续面引起的层流边界层的斯维茨积分法广义化
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2024-03-08 DOI: 10.1139/cjp-2023-0250
Ahmer Mahmood, Muhammad Awais
{"title":"Generalization of the Thwaites integral method for laminar boundary-layers due to moving continuous surfaces","authors":"Ahmer Mahmood, Muhammad Awais","doi":"10.1139/cjp-2023-0250","DOIUrl":"https://doi.org/10.1139/cjp-2023-0250","url":null,"abstract":"In this study, attention has been given towards the development of an approximate method for the boundary-layer flows involving no pressure gradient (the flows due to moving continuous surfaces in a still fluid). The integral method devised in this study is an extension of the existing Thwaites integral method; applicable to boundary-layer flows over the stationary surfaces of finite length (which, in general, involve the pressure gradient because of the presence of external potential flow, except for the case of uniform external flow). The existing Thwaites integral method does not give an acceptable approximation for the flows over moving continuous surfaces in a quiescent fluid, involving no pressure gradient. Therefore, the extension of the existing Thwaites integral method, proposed in this study, will make it applicable to the flows due to moving continuous surfaces in a stationary fluid (involving no pressure gradient), also. With the combination of the two, the existing, and the extended Thwaites integral method, the generalized Thwaites integral method is proposed, applicable to the boundary-layer flows whether involving a pressure gradient or not.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140257934","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
Ground-state energy of H-: a critical test of triple basis sets H- 的基态能量：对三重基集的关键测试
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2024-03-07 DOI: 10.1139/cjp-2023-0277
Evan M. R. Petrimoulx, Aaron T. Bondy, Eric A. Ene, Lamies A. Sati, Gordon W.F. Drake
{"title":"Ground-state energy of H-: a critical test of triple basis sets","authors":"Evan M. R. Petrimoulx, Aaron T. Bondy, Eric A. Ene, Lamies A. Sati, Gordon W.F. Drake","doi":"10.1139/cjp-2023-0277","DOIUrl":"https://doi.org/10.1139/cjp-2023-0277","url":null,"abstract":"We report an improved variational upper bound for the ground state energy of H- using Hylleraas-like wave functions in the form of a triple basis set having three distinct distance scales. The extended precision DQFUN of Bailey, allowing for 70 decimal digit arithmetic, is implemented to retain sufficient precision. Our result exceeds the previous record [A. M. Frolov, Euro. J. Phys. D 69, 132 (2015)], indicating that the Hylleraas triple basis set exhibits comparable convergence to the widely used pseudorandom all-exponential basis sets, but the numerical stability against roundoff error is much better. It is argued that the three distance scales have a clear physical interpretation. The new variational bound is --0.527 751 016 544 377 196 590 814 478 a.u. New variational bounds are also presented for the finite mass cases of the hydrogen, deuterium and tritium negative ions H-, D- and T-.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140259961","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
Spectra of phosphorus ions for astrophysical modeling: P~I - P~XV 用于天体物理建模的磷离子光谱：P~I - P~XV
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2024-03-02 DOI: 10.1139/cjp-2023-0272
S. Nahar, B. Shafique
{"title":"Spectra of phosphorus ions for astrophysical modeling: P~I - P~XV","authors":"S. Nahar, B. Shafique","doi":"10.1139/cjp-2023-0272","DOIUrl":"https://doi.org/10.1139/cjp-2023-0272","url":null,"abstract":"Phosphorus (P), a basic element of life, has been a least studied element due to its poor presence in astrophysical spectra. However, search for the P lines has increased considerably with discoveries of exoplanets and are being detected by high resolution and sophisticated astronomical observatories, e.g. James Webb Space Telescope (JWST). JWST may provide a clue for life with detection of P in its infrared (IR) region. Identification of the element and analysis of the observed spectra will require high accuracy data for atomic processes that produces lines and their predicted features. The present study focuses on these needs and reports systematically regions of wavelengths, from x-ray to IR, that show prominent lines by the 15 individual ionization stages of phosphorus, P I - P XV for the first time. We present large amount of relevant atomic data for energies, transition parameters, and lifetimes obtained in relativistic Breit-Pauli approximation using the R-matrix method and atomic structure program SUPERSTRUCTURE. Our spectral features for the fifteen ions, P I - P XV, predict strengths of lines in various wavelength regions. They show dominance of P~I and P~II in the infrared region and other ions in the ultraviolet and optical regions often stretching to IR in the continuum. For determination of accuracy, we have made extensive comparisons of our atomic data with available experimental and theoretical values. Based on these, our results and features are expected to provide precise plasma diagnostics and astrophysical modeling.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140267371","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
Measurability of Wigner time delay in a photoionization experiment 光离子化实验中维格纳时延的可测量性
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2024-03-01 DOI: 10.1139/cjp-2023-0226
P.C. Deshmukh, Sourav Banerjee, Steven T. Manson
{"title":"Measurability of Wigner time delay in a photoionization experiment","authors":"P.C. Deshmukh, Sourav Banerjee, Steven T. Manson","doi":"10.1139/cjp-2023-0226","DOIUrl":"https://doi.org/10.1139/cjp-2023-0226","url":null,"abstract":"We visit significant historical steps in quantum collision physics that make photoionization time delay measurable, especially considering the time-reversal symmetry in related processes. The works of A. Ravi P. Rau and Ugo Fano inspire key ideas presented in this article.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140083935","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
Wigner time delay and Hartman effect in quantum motion along deformed Riemannian manifolds 沿变形黎曼流形的量子运动中的维格纳时延和哈特曼效应
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2024-02-07 DOI: 10.1139/cjp-2023-0303
Benjamin Schwager, Lars Meschede, Jamal Berakdar
{"title":"Wigner time delay and Hartman effect in quantum motion along deformed Riemannian manifolds","authors":"Benjamin Schwager, Lars Meschede, Jamal Berakdar","doi":"10.1139/cjp-2023-0303","DOIUrl":"https://doi.org/10.1139/cjp-2023-0303","url":null,"abstract":"Elastic scattering of a wave can be quantified by a shift in the phase with respect to the incoming wave phase. A qualitative measure of the time during which the effect occurs is given by the Wigner time delay. The tunneling time in turn is known to saturate with increasing tunneling barrier width (Hartman effect). Here, we analyze the elastic quantum mechanical scattering in a deformed one-dimensional Riemannian manifold, particularly with respect to theWigner time delay and conclude on the Hartman effect. It is shown that scattering due to local curvature variations imply imperfect conduction behavior indicating resonance states and leads to a Wigner time delay which, at low energies, is in variance with the classical time delay that is inferred from the arc length. At moderate and high energies, however, classical and quantum time delays coincide.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140460401","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
DIELECTRIC PROPERTIES OF Ba0.8Sr0.2TiO3 FERROELECTRIC FILMS IN AN ALTERNATING ELECTRIC FIELD 反向电场中 Ba0.8Sr0.2TiO3 铁氧体薄膜的绝缘特性
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2024-01-31 DOI: 10.1139/cjp-2023-0265
A. Nabiyev, J. Huseynov, I. Abbasov
{"title":"DIELECTRIC PROPERTIES OF Ba0.8Sr0.2TiO3 FERROELECTRIC FILMS IN AN ALTERNATING ELECTRIC FIELD","authors":"A. Nabiyev, J. Huseynov, I. Abbasov","doi":"10.1139/cjp-2023-0265","DOIUrl":"https://doi.org/10.1139/cjp-2023-0265","url":null,"abstract":"Thin films of Ba0.8Sr0.2TiO3 were obtained by high-frequency sputtering on (100)p-Si substrates. Results of studies of frequency and temperature dependences of real and imaginary parts of dielectric permittivity of Ba0.8Sr0.2TiO3 ferroelectric film on alternating electric current are presented. It has been found that the polarization process has an activation character, the real and imaginary parts of the dielectric permeability decrease with increasing frequency, and the decrease rate is much higher at relatively low frequencies than at high frequencies. The relaxation time has been calculated and this crystal has been found to have an electron polarization mechanism due to thermal motion.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140472446","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
Gravastars in f (R,G,T) Gravity f (R,G,T) 重力中的重力星
IF 1.2 4区 物理与天体物理
Canadian Journal of Physics Pub Date : 2024-01-31 DOI: 10.1139/cjp-2023-0198
M. Ilyas
{"title":"Gravastars in f (R,G,T) Gravity","authors":"M. Ilyas","doi":"10.1139/cjp-2023-0198","DOIUrl":"https://doi.org/10.1139/cjp-2023-0198","url":null,"abstract":"The article examines the matter of gravitational vacuum stars, or gravastars, in the context of f(R,G,T) gravity, where R, G and T refer the Ricci Scalar, Gauss-Bonnet invariant term and Trace of energy momentum tensor. Here, using certain suitable numerical approaches, solutions to the highly nonlinear differential equations are determined. For a well-known f( R,G,T) gravity cosmological model, the main structure of gravastars has been discussed according to core, shell, and external region. It is illustrated graphically how the relationship between mass and radius has evolved for the gravastar under consideration.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140477926","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
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