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Frequency-domain interpretation of atomic ionization in bicircular laser fields 圆形激光场中原子电离的频域解释
4区 物理与天体物理
Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2025-04-29 DOI: 10.1088/1361-6455/add22f
Yuhong Li, F. Jin, Yujun Yang, Fang Li, Yingchun Guo, Zhiyi Wei, Jing Chen, Xiaojun Liu, Bingbing Wang
{"title":"Frequency-domain interpretation of atomic ionization in bicircular laser fields","authors":"Yuhong Li, F. Jin, Yujun Yang, Fang Li, Yingchun Guo, Zhiyi Wei, Jing Chen, Xiaojun Liu, Bingbing Wang","doi":"10.1088/1361-6455/add22f","DOIUrl":"https://doi.org/10.1088/1361-6455/add22f","url":null,"abstract":"Abstract Recently, using the laser field as a quantum field to study the interaction processes between intense lasers and matter has attracted extensive interest in the field of intense field research. In this paper, based on the frequency-domain theory where the laser field is considered as a quantum Fock state light, we have investigated the quantum coherence mechanism of the ionization spectrum in the bicircular laser fields. Using quantum channel analysis, we find that the ionization momentum spectra of atoms in the corotating two-color (CoRTC) and counter-rotating two-color (CRTC) fields are attributed to the interference between different channels, where the momentum spectra of all channels present concentric circular distribution. The crescent-shaped distribution of the total momentum spectrum in the CoRTC field is due to the phase difference between each two adjacent channels being a single azimuth angle of the ionized electron emission, while the triangular distribution of the momentum spectrum in the CRTC field is due to the phase difference between each two adjacent channels being three times the azimuth angle of the ionized electron emission. Furthermore, we employed the saddle-point approximation to analyze the interference fringes in the momentum spectrum of the CRTC field. With the help of quantum channel analysis, we give a new insight into the momentum spectrum of bicircular laser fields.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":"58 10","pages":"105401-105401"},"PeriodicalIF":0.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147878984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analytical solutions for optimal photon absorption into inhomogeneous spin memories 非均匀自旋存储器中最佳光子吸收的解析解
4区 物理与天体物理
Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2025-01-21 DOI: 10.1088/1361-6455/adacbf
József Zsolt Bernád, Michael Schilling, Yutian Wen, Matthias M. Müller, Tommaso Calarco, Patrice Bertet, Felix Motzoi
{"title":"Analytical solutions for optimal photon absorption into inhomogeneous spin memories","authors":"József Zsolt Bernád, Michael Schilling, Yutian Wen, Matthias M. Müller, Tommaso Calarco, Patrice Bertet, Felix Motzoi","doi":"10.1088/1361-6455/adacbf","DOIUrl":"https://doi.org/10.1088/1361-6455/adacbf","url":null,"abstract":"Abstract We investigate for optimal photon absorption a quantum electrodynamical model of an inhomogeneously-broadened spin ensemble coupled to a single-mode cavity. Solutions to this problem under experimental assumptions are developed in the Schrödinger picture without using perturbation theory concerning the cavity-spin interactions. Furthermore, we exploit the possibility of modulating the frequency and coupling rate of the resonator. We consider a one-photon input pulse and show some optimal scenarios, where exact formulas and numerical results are obtained for the absorption probabilities and the optimal pulse shapes. In particular, if the external loss dominates the internal loss of the cavity, we find the optimal cooperativity for different parameters and identify cases where absorption with a success probability larger than 99% is achieved.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":"58 3","pages":"035501-035501"},"PeriodicalIF":0.0,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://iopscience.iop.org/article/10.1088/1361-6455/adacbf/pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147906084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Advances in Timing and Control of Ultrafast Molecular Dynamics: From XUV to Infrared 超快分子动力学的定时与控制研究进展：从紫外到红外
4区 物理与天体物理
Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-09-18 DOI: 10.1088/1361-6455/ad7cac
Wenyu Jiang, Shengzhe Pan, Hao Huang, Jihong Tong, Wenbin Zhang, Hongcheng Ni, Jian Wu
{"title":"Advances in Timing and Control of Ultrafast Molecular Dynamics: From XUV to Infrared","authors":"Wenyu Jiang, Shengzhe Pan, Hao Huang, Jihong Tong, Wenbin Zhang, Hongcheng Ni, Jian Wu","doi":"10.1088/1361-6455/ad7cac","DOIUrl":"https://doi.org/10.1088/1361-6455/ad7cac","url":null,"abstract":"Abstract With the availability of modern laser and detection technologies, the investigation of ultrafast molecular dynamics induced by intense laser pulses has become a routine practice. In this Topical Review, we present a survey of recent progress in the timing and control of ultrafast molecular dynamics, encompassing processes initiated by both extreme ultraviolet and near infrared pulses. Prospects and perspectives of this field are given. This Review underscores the remarkable potential for further advances in understanding and harnessing ultrafast molecular processes.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147889197","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
Toward a Mølmer Sørensen gate with .9999 fidelity 实现保真度为 0.9999 的 Mølmer Sørensen 闸门
IF 1.6 4区 物理与天体物理
Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-09-16 DOI: 10.1088/1361-6455/ad76ef
Reinhold Blümel, Andrii Maksymov and Ming Li
{"title":"Toward a Mølmer Sørensen gate with .9999 fidelity","authors":"Reinhold Blümel, Andrii Maksymov and Ming Li","doi":"10.1088/1361-6455/ad76ef","DOIUrl":"https://doi.org/10.1088/1361-6455/ad76ef","url":null,"abstract":"Realistic fault-tolerant quantum computing at reasonable overhead requires two-qubit gates with the highest possible fidelity. Typically, an infidelity of is recommended in the literature. Focusing on the phase-sensitive architecture used in laboratories and by commercial companies to implement quantum computers, we show that even under noise-free, ideal conditions, neglecting the carrier term and linearizing the Lamb–Dicke term in the Hamiltonian used for control-pulse construction for generating Mølmer–Sørensen XX gates based on the Raman scheme are not justified if the goal is an infidelity target of . We obtain these results with a gate simulator code that, in addition to the computational space, explicitly takes the most relevant part of the phonon space into account. With the help of a Magnus expansion carried to the third order, keeping terms up to the fourth order in the Lamb–Dicke parameters, we identify the leading sources of coherent errors, which we show can be eliminated by adding a single linear equation to the phase-space closure conditions and subsequently adjusting the amplitude of the control pulse (calibration). This way, we obtain XX gates with infidelities .","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":"3 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248333","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
X-ray circular dichroism measured by cross-polarization x-ray transient grating 通过交叉偏振 X 射线瞬态光栅测量 X 射线圆二色性
IF 1.6 4区 物理与天体物理
Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-09-16 DOI: 10.1088/1361-6455/ad6b62
Jérémy R Rouxel, Riccardo Mincigrucci, Danny Fainozzi and Claudio Masciovecchio
{"title":"X-ray circular dichroism measured by cross-polarization x-ray transient grating","authors":"Jérémy R Rouxel, Riccardo Mincigrucci, Danny Fainozzi and Claudio Masciovecchio","doi":"10.1088/1361-6455/ad6b62","DOIUrl":"https://doi.org/10.1088/1361-6455/ad6b62","url":null,"abstract":"Measuring natural circular dichroism in the x-ray regime to extract stereochemical information from chiral molecules in solution remains a challenge. This is primarily due to technical limitations of the existing synchrotron sources, which hinder access to measurements of local chirality by exploiting core hole electronic transitions. In response to this challenge, we propose an alternative approach: utilizing XFEL-based cross-polarization x-ray transient grating (XTG). This method provides an indirect means to measure x-ray circular dichroism (XCD). Notably, our findings reveal that the signal emerges only once the excited cores have undergone dephasing through relaxation. XTG is now routinely measured in the XUV regime and has recently been made available for hard x-rays. Free electron lasers now offer polarization controls, and XTG can be extended to various polarization states for the two pump beams, making XCD measured by XTG feasible with the current state-of-the-art technology.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":"14 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248332","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 states and spectra of small cylindrical and toroidal lattices 小圆柱形和环形晶格的量子态和光谱
IF 1.6 4区 物理与天体物理
Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-09-15 DOI: 10.1088/1361-6455/ad7552
Caelan Brooks and Kunal K Das
{"title":"Quantum states and spectra of small cylindrical and toroidal lattices","authors":"Caelan Brooks and Kunal K Das","doi":"10.1088/1361-6455/ad7552","DOIUrl":"https://doi.org/10.1088/1361-6455/ad7552","url":null,"abstract":"We examine the spectrum and quantum states of small lattices with cylindrical and toroidal topology subject to a scalar gauge potential that introduces a position dependent phase in the inter-site coupling. Equivalency of gauges assumed in infinite lattices is generally lost due to the periodic boundary conditions, and conditions that restore it are identified. We trace the impact of various system parameters including gauge choice, boundary conditions and inter-site coupling strengths, and an additional axial field. We find gauge dependent appearance of avoided crossings and persistent degeneracies, and we show their impact on the associated eigenstates. Smaller lattices develop prominent gaps in spectral lines associated with edge states, which are suppressed in the thermodynamic limit. Toroidal lattices have counterparts of most of the features observed in cylindrical lattices, but notably they display a transition from localization to delocalization determined by the relation between the field parameter and the number of lattice sites.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":"13 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248334","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
Addendum: Multichannel quantum defect theory of strontium bound Rydberg states (2014 J. Phys. B: At. Mol. Opt. Phys. 47 155001) 增编：锶结合雷德贝格态的多通道量子缺陷理论（2014 J. Phys. B: At. Mol. Opt. Phys. 47 155001）
IF 1.6 4区 物理与天体物理
Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-09-10 DOI: 10.1088/1361-6455/ad76f0
C L Vaillant, M P A Jones and R M Potvliege
{"title":"Addendum: Multichannel quantum defect theory of strontium bound Rydberg states (2014 J. Phys. B: At. Mol. Opt. Phys. 47 155001)","authors":"C L Vaillant, M P A Jones and R M Potvliege","doi":"10.1088/1361-6455/ad76f0","DOIUrl":"https://doi.org/10.1088/1361-6455/ad76f0","url":null,"abstract":"Newly calculated multichannel quantum defect theory parameters and channel fractions are presented for the singlet and triplet S, P and D series and singlet F series of strontium. These results correct those reported in Vaillant et al (2014 J. Phys. B: At. Mol. Opt. Phys.47 155001).","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":"3 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142190907","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
Laser-assisted radiative recombination in a cold hydrogen plasma 冷氢等离子体中的激光辅助辐射重组
IF 1.6 4区 物理与天体物理
Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-09-09 DOI: 10.1088/1361-6455/ad75f6
I I Fabrikant and H B Ambalampitiya
{"title":"Laser-assisted radiative recombination in a cold hydrogen plasma","authors":"I I Fabrikant and H B Ambalampitiya","doi":"10.1088/1361-6455/ad75f6","DOIUrl":"https://doi.org/10.1088/1361-6455/ad75f6","url":null,"abstract":"We study the process of laser-assisted radiative recombination of an electron with a proton in a cold hydrogen plasma employing the semiclassical Kramers’ approach which involves calculation of classical trajectories in combined laser and Coulomb fields and the use of the correspondence principle. Due to the Coulomb focusing effect, recombination is the most effective when the initial electron momentum is parallel to the laser polarization. Orders of magnitude enhancement of the cross section, as compared to the laser-free case, is observed in this case. With increasing angle between the electron momentum and polarization, the recombination cross section drops. However, even after averaging over Maxwellian velocity distribution we obtain a substantial enhancement of the recombination rate constant, as compared to the zero-field case. For the field intensities in the range 30–350 MW cm−2, the enhancement occurs in the region of the radiation wavelength from 5 to 20 µm and for the plasma temperature from 20 to 300 K.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":"34-35 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142190910","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
Absolute nuclear charge radius by Na-like spectral line separation in high-Z elements 高 Z 元素中通过类 Na 光谱线分离得出的绝对核电荷半径
IF 1.6 4区 物理与天体物理
Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-09-09 DOI: 10.1088/1361-6455/ad717b
A Hosier, 0000-0001-6675-8509Dipti3, S A Blundell, R Silwal, A Lapierre, J D Gillaspy, G Gwinner, J N Tan, A A Kwiatkowski, Y Wang, H Staiger, A C C Villari, Yu Ralchenko, E Takacs
{"title":"Absolute nuclear charge radius by Na-like spectral line separation in high-Z elements","authors":"A Hosier, 0000-0001-6675-8509Dipti3, S A Blundell, R Silwal, A Lapierre, J D Gillaspy, G Gwinner, J N Tan, A A Kwiatkowski, Y Wang, H Staiger, A C C Villari, Yu Ralchenko, E Takacs","doi":"10.1088/1361-6455/ad717b","DOIUrl":"https://doi.org/10.1088/1361-6455/ad717b","url":null,"abstract":"We describe a novel technique to determine absolute nuclear radii of high-<italic toggle=\"yes\">Z</italic> nuclides. Utilizing accurate theoretical atomic structure calculations together with precise measurements of extreme ultraviolet transitions in highly charged ions this method allows for precise determinations of absolute nuclear charge radii based upon the well-known nuclear radii of their neighboring elements. This method can work for elements without stable isotopes, and its accuracy may be competitive with current methods (electron scattering and muonic x-ray spectroscopy).","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":"26 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142190906","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
Perspective for in-volume machining of solid materials by undersurface focusing of x-ray pulses 通过表面下聚焦 X 射线脉冲对固体材料进行体积内加工的展望
IF 1.6 4区 物理与天体物理
Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-09-06 DOI: 10.1088/1361-6455/ad7551
Ichiro Inoue, Beata Ziaja
{"title":"Perspective for in-volume machining of solid materials by undersurface focusing of x-ray pulses","authors":"Ichiro Inoue, Beata Ziaja","doi":"10.1088/1361-6455/ad7551","DOIUrl":"https://doi.org/10.1088/1361-6455/ad7551","url":null,"abstract":"In this perspective article we propose and discuss a possible technique of in-depth material processing based on undersurface focusing of intense x-ray pulses. Currently, x-ray free-electron lasers can produce such intense x-ray pulses with femtosecond pulse durations, reaching intensities sufficiently high to cause ultrafast melting of a material after a single laser shot. Here, on the example of silicon crystal we will demonstrate that with a proper choice of pulse parameters and focusing parameters, the already existing nanofocusing setup has a capability to focus hard x rays down to several hundreds micrometers below the material surface. This can trigger the required structural modification in the focal point, without damaging the material above. Potential applications of the new technique are discussed.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":"2 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142190794","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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