Journal of Physics B: Atomic, Molecular and Optical Physics最新文献_第5页

Superfluid fraction tensor of a two-dimensional supersolid 二维超固体的超流体分数张量

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-05-06 DOI: 10.1088/1361-6455/ad41c1

P B Blakie

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Muon-induced nuclear magnetic moments in spinless muonic atoms: a simple estimate 无自旋μ介子原子中的μ介子诱导核磁矩：简单估算

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-04-25 DOI: 10.1088/1361-6455/ad38a9

K A Beyer and N S Oreshkina

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Shortcuts to adiabaticity: theoretical framework, relations between different methods, and versatile approximations 绝热捷径：理论框架、不同方法之间的关系以及通用近似值

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-04-21 DOI: 10.1088/1361-6455/ad38f1

Takuya Hatomura

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Faster than a speeding bullet—the 2023 Physics Nobel Prize 比子弹还快--2023 年诺贝尔物理学奖

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-04-11 DOI: 10.1088/1361-6455/ad3600

Marc Vrakking

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Excitation and recombination studies with silicon and sulphur ions at an EBIT 硅和硫离子在 EBIT 条件下的激发和重组研究

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-04-02 DOI: 10.1088/1361-6455/ad31ad

I Orban, S Mahmood, T Fritjof, E Lindroth, C Z Dong, J l Rui, L Y Xie, R Schuch

{"title":"Excitation and recombination studies with silicon and sulphur ions at an EBIT","authors":"I Orban, S Mahmood, T Fritjof, E Lindroth, C Z Dong, J l Rui, L Y Xie, R Schuch","doi":"10.1088/1361-6455/ad31ad","DOIUrl":"https://doi.org/10.1088/1361-6455/ad31ad","url":null,"abstract":"Measurements of electron-impact excitation and recombination rate coefficients of highly charged Si and S ions at the Stockholm electron beam ion trap are reported. The experimental method was a combination of photon detection from the trapped ions during probing and subsequently extraction and time-of-flight (TOF) charge analysis of these ions. The TOF technique allows to measure recombination rate coefficients separately for every charge state, and together with the photon spectra of these ions also the excitation rate coefficients. In this paper, we present more details of the experimental procedure and summarize the experimental results in comparison with two different state-of-the-art calculations of recombination and excitation rates for Si10+–Si13+ and S12+–S15+ ions. One of these uses a relativistic configuration interaction approach (flexible atomic code) and the other is a relativistic many-body perturbation theory. A good to excellent agreement with both of them is found in energy and resonance strength for the investigated ions.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":"32 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140572091","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

Entanglement dynamics of two non-Hermitian qubits 两个非赫米提质子的纠缠动力学

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-03-26 DOI: 10.1088/1361-6455/ad34a0

Yi-Xi Zhang, Zhen-Tao Zhang, Xiao-Zhi Wei, Bao-Long Liang, Feng Mei, Zhen-Shan Yang

引用次数: 0

Enhanced positron acceleration driven by femto-second laser pulses irradiating structured targets 飞秒激光脉冲照射结构化目标所驱动的增强型正电子加速度

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-03-21 DOI: 10.1088/1361-6455/ad31b1

S Chintalwad, S Krishnamurthy, S Ghosh, C P Ridgers, B Ramakrishna

{"title":"Enhanced positron acceleration driven by femto-second laser pulses irradiating structured targets","authors":"S Chintalwad, S Krishnamurthy, S Ghosh, C P Ridgers, B Ramakrishna","doi":"10.1088/1361-6455/ad31b1","DOIUrl":"https://doi.org/10.1088/1361-6455/ad31b1","url":null,"abstract":"We have proposed a compact scheme for generating high-density and high-energy positrons by irradiating different shaped targets with an ultra-intense laser pulse, using 2D particle-in-cell simulations and numerical analysis. Our simulations show that the Breit–Wheeler process dominates positron production during laser-target interaction when a laser with an intensity of <inline-formula>\u0000<tex-math><?CDATA $4 times 10^{23}~mathrm{W,cm}^{-2}$?></tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mrow><mml:mn>4</mml:mn><mml:mo>×</mml:mo><mml:msup><mml:mn>10</mml:mn><mml:mrow><mml:mn>23</mml:mn></mml:mrow></mml:msup><mml:mtext> </mml:mtext><mml:msup><mml:mrow><mml:mi mathvariant=\"normal\">W</mml:mi><mml:mstyle scriptlevel=\"0\"></mml:mstyle><mml:mi>cm</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>\u0000<inline-graphic xlink:href=\"bad31b1ieqn1.gif\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> is used. We obtain a positron beam with an energy of 2.5 GeV and a total number exceeding 109, which is an improvement by two orders of magnitude compared to previous work with the same laser intensity. By using different shaped targets, we are able to generate a high-energy positron beam with low divergence. The yield of positron pairs depends on both the target and the laser parameters, and we have investigated how the shape of the target can enhance pair production and reduce divergence. Both of our analytical and simulation results demonstrate that this high-flux and low-divergence positron beam has direct applications in the field of medical and astro-physics that can be explored in the upcoming high intensity laser facilities.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":"117 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316182","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

Generation of interferometrically stable pulse pairs from a free-electron laser using a birefringent interferometer 利用双折射干涉仪从自由电子激光器中产生干涉测量稳定脉冲对

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-03-20 DOI: 10.1088/1361-6455/ad2e2d

B Ardini, F Richter, L Uboldi, P Cinquegrana, M Danailov, A Demidovich, S D Ganeshamandiram, S Hartweg, G Kurdi, F Landmesser, M Michelbach, A Ngai, I Nikolov, N Rendler, F Stienkemeier, D Uhl, L Bruder, G Cerullo, C Manzoni

引用次数: 0

Imagining density distribution of molecular orbitals in IR+XUV co-rotating circular laser fields by frequency-domain theory 用频域理论想象红外+紫外共旋转圆形激光场中分子轨道的密度分布

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-03-20 DOI: 10.1088/1361-6455/ad31b0

Yu-Hong Li, Facheng Jin, Yujun Yang, Fei Li, Ying-Chun Guo, Zhi-Yi Wei, Jing Chen, Xiaojun Liu, Bingbing Wang

{"title":"Imagining density distribution of molecular orbitals in IR+XUV co-rotating circular laser fields by frequency-domain theory","authors":"Yu-Hong Li, Facheng Jin, Yujun Yang, Fei Li, Ying-Chun Guo, Zhi-Yi Wei, Jing Chen, Xiaojun Liu, Bingbing Wang","doi":"10.1088/1361-6455/ad31b0","DOIUrl":"https://doi.org/10.1088/1361-6455/ad31b0","url":null,"abstract":"We have investigated the angle-resolved ATI spectrum of oriented molecules in the IR+XUV co-rotating circular laser fields. According to the different roles of IR and XUV laser in the ionization process, we purposefully adjust the photon energy of XUV and the intensity of IR laser to make the ionization spectrum of the molecule distributed in a suitable momentum region. Moreover, under the same laser conditions, the background fringes in the ionization spectrum of the molecule can be removed by using the ionization spectrum of the atom with the same ionization energy as the molecule, so that the molecular orbital density distribution in the suitable momentum region can be obtained. That is, for any unknown molecule, as long as the ionization energy of the molecule can be measured, the density distribution of the molecular orbital can be imaged in a definite momentum region by adjusting the laser field conditions, which may shed light on the experimental detection of molecular orbitals.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":"26 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316079","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

Modulation transfer spectroscopy of the D1 transition of potassium: theory and experiment 钾 D1 转变的调制传递光谱学：理论与实验

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-03-20 DOI: 10.1088/1361-6455/ad31af

A D Innes, P Majumder, H R Noh, S L Cornish

{"title":"Modulation transfer spectroscopy of the D1 transition of potassium: theory and experiment","authors":"A D Innes, P Majumder, H R Noh, S L Cornish","doi":"10.1088/1361-6455/ad31af","DOIUrl":"https://doi.org/10.1088/1361-6455/ad31af","url":null,"abstract":"We report on a study of modulation transfer spectroscopy of the <inline-formula>\u0000<tex-math><?CDATA $4textrm{S}_{1/2}rightarrow 4textrm{P}_{1/2}$?></tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mrow><mml:mn>4</mml:mn><mml:msub><mml:mtext>S</mml:mtext><mml:mrow><mml:mn>1</mml:mn><mml:mrow><mml:mo>/</mml:mo></mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:mo stretchy=\"false\">→</mml:mo><mml:mn>4</mml:mn><mml:msub><mml:mtext>P</mml:mtext><mml:mrow><mml:mn>1</mml:mn><mml:mrow><mml:mo>/</mml:mo></mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>\u0000<inline-graphic xlink:href=\"bad31afieqn2.gif\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> (D1) transition of naturally abundant potassium in a room-temperature vapour cell. This transition is critical for laser cooling and optical pumping of potassium and our study is therefore motivated by the need for robust laser frequency stabilisation. Despite the absence of a closed transition, the small ground-state hyperfine splitting in potassium results in strong crossover features in the D1 modulation transfer spectrum. To emphasise this we compare the D1 and D2 spectra of potassium with those of rubidium. Further, we compare our experimental results with a detailed theoretical simulation, examining different pump–probe polarisation configurations to identify the optimal signals for laser frequency stabilisation. We find good agreement between the experiment and the theory, especially for the <inline-formula>\u0000<tex-math><?CDATA $textrm{lin} parallel textrm{lin}$?></tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mrow><mml:mtext>lin</mml:mtext><mml:mo>∥</mml:mo><mml:mtext>lin</mml:mtext></mml:mrow></mml:math>\u0000<inline-graphic xlink:href=\"bad31afieqn3.gif\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> polarisation configuration.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316082","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