Journal of Physics B最新文献

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First merged issue ofJournal of Physics B: Atomic, Molecular and Optical PhysicswithJournal of Optics B: Quantum and Semiclassical Optics 《物理学报B辑:原子、分子与光学物理》与《光学学报B辑:量子与半经典光学》首次合并
Journal of Physics B Pub Date : 2006-01-14 DOI: 10.1088/0953-4075/39/1/E01
J. Rost
{"title":"First merged issue ofJournal of Physics B: Atomic, Molecular and Optical PhysicswithJournal of Optics B: Quantum and Semiclassical Optics","authors":"J. Rost","doi":"10.1088/0953-4075/39/1/E01","DOIUrl":"https://doi.org/10.1088/0953-4075/39/1/E01","url":null,"abstract":"With the first issue of 2006 Journal of Physics B: Atomic, Molecular and Optical Physics (J. Phys. B) has successfully incorporated the former journal J. Opt. B. Under the well known and recognized name Journal of Physics B: Atomic, Molecular and Optical Physics the new merged journal will have a much wider scope, serving both the atomic, molecular and optical community and the quantum optics community. We have already taken a visible measure towards this direction in 2005 with the publication of a special issue on the occasion of Einstein's annus mirabilis 100 years before. This issue, edited by 2005 Nobel laureate Ted Hansch, Horst Schmidt-Bocking and Herbert Walther, provides a wide and deep survey of leading research in the fields J. Phys. B will promote in the years to come. You will also find the broadening in scope reflected in the scientific interests of the members of the new Editorial Board of J. Phys. B. J. Phys. B continues its dedication to innovative collision physics. At the same time it is ready to prominently disseminate with its wider scope the new and exciting research developments in connection with ultracold gases and new light sources which will deliver intense pulses of much shorter wave- and pulse length than available in the past, creating new research possibilities for atomic and molecular physics. As Editor-in-Chief I would also like to take the opportunity to thank the staff at the Institute of Physics, and especially of J. Phys. B, for all the work they have put into the journal over the last year with preparing the incorporation of J. Opt. B into J. Phys. B while continuing their much appreciated high quality service to readers and authors. In this spirit I wish all of you a good and scientifically exciting year 2006.","PeriodicalId":16799,"journal":{"name":"Journal of Physics B","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2006-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80298298","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
TOPICAL REVIEW: Atomic and molecular processes in the early Universe 主题回顾:早期宇宙中的原子和分子过程
Journal of Physics B Pub Date : 2005-05-09 DOI: 10.1063/1.1928873
S. Lepp, P. Stancil, A. Dalgarno
{"title":"TOPICAL REVIEW: Atomic and molecular processes in the early Universe","authors":"S. Lepp, P. Stancil, A. Dalgarno","doi":"10.1063/1.1928873","DOIUrl":"https://doi.org/10.1063/1.1928873","url":null,"abstract":"When our universe was about 380,000 years old, it underwent a period of recombination and produced the first neutral atoms. This event, the recombination epoch, represents a transition, from when the matter and radiation are strongly coupled to when they evolve independently. The universe after this point is optically thin, that is photons are most likely to cross the universe without interactions. The matter, no longer coupled to the radiation, begins to collapse and form stars, galaxies and clusters of galaxies. This structure formation is controlled by atomic and molecular processes.In this paper we review the atomic physics that is most relevant to this early period in the universe, when the first collapsed objects were just beginning to form. We start by reviewing the conditions of the early universe. Then we discuss the formation of the first atoms molecular ions and molecules. Finally, we discuss how these processes are important in the collapse of the first objects.","PeriodicalId":16799,"journal":{"name":"Journal of Physics B","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2005-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76918766","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: 5
Corrections to the following three papers pertaining to electron impact ionization efficiency curves calculated using the BEB model for molecules containing third and fourth row atoms 修正以下三篇关于使用BEB模型计算含有第三和第四排原子的分子的电子冲击电离效率曲线的论文
Journal of Physics B Pub Date : 2005-04-14 DOI: 10.1088/0953-4075/38/7/C01
C. Vallance, P. W. Harland
{"title":"Corrections to the following three papers pertaining to electron impact ionization efficiency curves calculated using the BEB model for molecules containing third and fourth row atoms","authors":"C. Vallance, P. W. Harland","doi":"10.1088/0953-4075/38/7/C01","DOIUrl":"https://doi.org/10.1088/0953-4075/38/7/C01","url":null,"abstract":"Absolute electron impact ionization cross sections for CH3X, where X = H, F, Cl, Br, and I Claire Vallance et al 1997 J. Phys. B: At. Mol. Opt. Phys. 30 2465–2475 Absolute electron-impact ionization cross sections for a range of C1 to C5 chlorocarbons James E Hudson et al 2001 J. Phys. B: At. Mol. Opt. Phys. 34 3025–3039 Absolute electron impact ionization cross-sections for CO, CO2, OCS and CS2 James E Hudson et al 2004 J. Phys. B: At. Mol. Opt. Phys. 37 445–455 We have recently re-examined some published binary-encounter–Bethe (BEB) calculations on the electron impact ionization cross sections for halogenated hydrocarbons and sulfur-containing molecules, and found a discrepancy with our earlier results. Please see the PDF file for full details.","PeriodicalId":16799,"journal":{"name":"Journal of Physics B","volume":"47 5","pages":"1077-1079"},"PeriodicalIF":0.0,"publicationDate":"2005-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72581811","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: 5
Binding energy and scattering length for diatomic systems 双原子系统的结合能和散射长度
Journal of Physics B Pub Date : 2004-11-14 DOI: 10.1088/0953-4075/37/21/004
B. Gao
{"title":"Binding energy and scattering length for diatomic systems","authors":"B. Gao","doi":"10.1088/0953-4075/37/21/004","DOIUrl":"https://doi.org/10.1088/0953-4075/37/21/004","url":null,"abstract":"We discuss the relationship between scattering length and binding energy for a diatomic system with long-range van der Waals interaction. The well-known relation, ϵ0 = −(ℏ2/2μ)(1/a0)2, is generalized to much higher orders for the s wave. Analytic results for the binding energies of p and higher angular momentum states are also presented.","PeriodicalId":16799,"journal":{"name":"Journal of Physics B","volume":"18 1","pages":"4273-4279"},"PeriodicalIF":0.0,"publicationDate":"2004-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84435506","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: 19
Resolution and accuracy of resonances in R-matrix cross sections r矩阵截面共振的分辨率和精度
Journal of Physics B Pub Date : 2004-06-21 DOI: 10.1088/0953-4075/37/12/013
F. Delahaye, S. Nahar, A. Pradhan, H. L. Zhang
{"title":"Resolution and accuracy of resonances in R-matrix cross sections","authors":"F. Delahaye, S. Nahar, A. Pradhan, H. L. Zhang","doi":"10.1088/0953-4075/37/12/013","DOIUrl":"https://doi.org/10.1088/0953-4075/37/12/013","url":null,"abstract":"We investigate the effect of resonances in photoionization and recombination cross sections computed using the R-matrix method. Photoionization and recombination rates derived from high-resolution cross sections for oxygen ions are compared with earlier works with less resolution and accuracy, such as in the widely used Opacity Project data. We find significant differences in photoionization rates for O II metastable states, averaged over Planck functions corresponding to ionizing radiation fields, with respect to the intrinsic accuracy of the calculations and improved resolution. Furthermore, for highly charged ions other physical effects are also important. Recombination rate coefficients, averaged over a Maxwellian distribution, are extremely sensitive to the position and resolution of near-threshold resonances and radiation damping, in (e + O VII) ⟷ O VI + hν. Surprisingly, however, the effect on the monochromatic and the mean Rosseland and Planck bound-free opacities is relatively small, but may be potentially significant.","PeriodicalId":16799,"journal":{"name":"Journal of Physics B","volume":"179 1","pages":"2585-2592"},"PeriodicalIF":0.0,"publicationDate":"2004-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73174641","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: 2
Scattering of electrons from hydride molecules: PH3 氢化物分子的电子散射:PH3
Journal of Physics B Pub Date : 2004-05-14 DOI: 10.1088/0953-4075/37/9/005
C. Szmytkowski, U. Osowski, A. Domaracka, M. Piotrowicz, El bieta Ptasi ska-Denga
{"title":"Scattering of electrons from hydride molecules: PH3","authors":"C. Szmytkowski, U. Osowski, A. Domaracka, M. Piotrowicz, El bieta Ptasi ska-Denga","doi":"10.1088/0953-4075/37/9/005","DOIUrl":"https://doi.org/10.1088/0953-4075/37/9/005","url":null,"abstract":"An absolute total cross section (TCS) for electron scattering from phosphine (PH3) molecules was obtained in a linear transmission experiment at energies ranging from low (0.5 eV) to intermediate (370 eV). The dominant behaviour of the TCS energy function is a very pronounced low-energy enhancement with two distinct resonant-like humps peaked at around 2.4 and 6 eV. Above 10 eV the TCS is a rather featureless, monotonically decreasing function of energy. Our experimental results are compared with the theoretical predictions and intermediate-energy measurements. The similarities and differences of experimental TCS data for isoelectronic hydrides containing third-period atoms (SiH4, PH3, H2S and HCl) are also pointed out and discussed.","PeriodicalId":16799,"journal":{"name":"Journal of Physics B","volume":"27 1","pages":"1833-1840"},"PeriodicalIF":0.0,"publicationDate":"2004-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84121507","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: 11
A density-functional approach to fermionization in the 1D Bose gas 一维玻色气体中费米化的密度泛函方法
Journal of Physics B Pub Date : 2003-11-10 DOI: 10.1088/0953-4075/37/7/073
J. Brand
{"title":"A density-functional approach to fermionization in the 1D Bose gas","authors":"J. Brand","doi":"10.1088/0953-4075/37/7/073","DOIUrl":"https://doi.org/10.1088/0953-4075/37/7/073","url":null,"abstract":"A time-dependent Kohn–Sham scheme for 1D bosons with contact interaction is derived based on a model of spinor fermions. This model is specifically designed for the study of the strong interaction regime close to the Tonks gas. It allows us to treat the transition from the strongly interacting Tonks–Girardeau to the weakly interacting quasicondensate regime and provides an intuitive picture of the extent of fermionization in the system. An adiabatic local-density approximation is devised for the study of time-dependent processes. This scheme is shown to yield not only accurate ground-state properties but also overall features of the elementary excitation spectrum, which is described exactly in the Tonks-gas limit.","PeriodicalId":16799,"journal":{"name":"Journal of Physics B","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2003-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82921678","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: 15
Comment on 'Quantum inversion of cold atoms in a microcavity: spatial dependence' 对“微腔中冷原子的量子反演:空间依赖性”的评论
Journal of Physics B Pub Date : 2003-10-09 DOI: 10.1088/0953-4075/36/20/N01
T. Bastin, John Martin
{"title":"Comment on 'Quantum inversion of cold atoms in a microcavity: spatial dependence'","authors":"T. Bastin, John Martin","doi":"10.1088/0953-4075/36/20/N01","DOIUrl":"https://doi.org/10.1088/0953-4075/36/20/N01","url":null,"abstract":"In a recent work, Abdel-Aty and Obada (2002 J. Phys. B: At. Mol. Opt. Phys. 35 807–13) analysed the quantum inversion of cold atoms in a microcavity, the motion of the atoms being described quantum mechanically. Two-level atoms were assumed to interact with a single mode of the cavity, and the off-resonance case was considered (namely the atomic transition frequency is detuned from the single-mode cavity frequency). We demonstrate in this paper that this case is incorrectly treated by these authors, and we therefore question their conclusions.","PeriodicalId":16799,"journal":{"name":"Journal of Physics B","volume":"94 1","pages":"4201-4203"},"PeriodicalIF":0.0,"publicationDate":"2003-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77314245","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: 1
Vortices in a Bose-Einstein condensate confined by an optical lattice 受光学晶格限制的玻色-爱因斯坦凝聚中的涡旋
Journal of Physics B Pub Date : 2003-08-05 DOI: 10.1088/0953-4075/36/16/308
P. Kevrekidis, R. Carretero-Gonz'alez, G. Theocharis, D. Frantzeskakis, B. Malomed
{"title":"Vortices in a Bose-Einstein condensate confined by an optical lattice","authors":"P. Kevrekidis, R. Carretero-Gonz'alez, G. Theocharis, D. Frantzeskakis, B. Malomed","doi":"10.1088/0953-4075/36/16/308","DOIUrl":"https://doi.org/10.1088/0953-4075/36/16/308","url":null,"abstract":"We investigate the dynamics of vortices in repulsive Bose–Einstein condensates in the presence of an optical lattice (OL) and a parabolic magnetic trap. The dynamics is sensitive to the phase of the OL potential relative to the magnetic trap, and depends less on the OL strength. For the cosinusoidal OL potential, a local minimum is generated at the trap's centre, creating a stable equilibrium for the vortex, while in the case of the sinusoidal potential, the vortex is expelled from the centre, demonstrating spiral motion. Cases where the vortex is created far from the trap's centre are also studied, revealing slow outward-spiralling drift. Numerical results are explained in an analytical form by means of a variational approximation. Finally, motivated by a discrete model (which is tantamount to the case of the strong OL lattice), we present a novel type of vortex consisting of two pairs of antiphase solitons.","PeriodicalId":16799,"journal":{"name":"Journal of Physics B","volume":"1 1","pages":"3467-3476"},"PeriodicalIF":0.0,"publicationDate":"2003-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76474922","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: 26
The ε expansion in the symmetry-broken phase of an interacting Bose gas at finite temperature 有限温度下相互作用玻色气体对称破缺相中的ε膨胀
Journal of Physics B Pub Date : 2003-07-16 DOI: 10.1088/0953-4075/36/22/017
G. Metikas, G. Metikas, Oliver Zobay, Gernot Alber
{"title":"The ε expansion in the symmetry-broken phase of an interacting Bose gas at finite temperature","authors":"G. Metikas, G. Metikas, Oliver Zobay, Gernot Alber","doi":"10.1088/0953-4075/36/22/017","DOIUrl":"https://doi.org/10.1088/0953-4075/36/22/017","url":null,"abstract":"We discuss the application of the momentum-shell renormalization group method to the interacting homogeneous Bose gas in the symmetric and symmetry-broken phases. It is demonstrated that recently discussed discrepancies are artefacts due to not taking proper care of infrared divergencies appearing at finite temperature. If these divergencies are taken into account and treated properly by means of the e expansion, the resulting renormalization group equations and the corresponding universal properties are identical in the symmetric and symmetry-broken phases.","PeriodicalId":16799,"journal":{"name":"Journal of Physics B","volume":"87 1","pages":"4595-4604"},"PeriodicalIF":0.0,"publicationDate":"2003-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74028180","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: 4
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