The European Physical Journal D最新文献

{"title":"Experimental and theoretical total cross sections for single and double ionization of the open-4d-shell ions Xe(^{12+}), Xe(^{13+}), and Xe(^{14+}) by electron impact","authors":"Fengtao Jin,&nbsp;Alexander Borovik Jr.,&nbsp;B. Michel Döhring,&nbsp;Benjamin Ebinger,&nbsp;Alfred Müller,&nbsp;Stefan Schippers","doi":"10.1140/epjd/s10053-024-00854-2","DOIUrl":"10.1140/epjd/s10053-024-00854-2","url":null,"abstract":"<p>We present new experimental and theoretical cross sections for electron-impact single ionization of Xe<span>(^{12+})</span> and Xe<span>(^{13+})</span> ions, and double ionization of Xe<span>(^{12+})</span>, Xe<span>(^{13+})</span> and Xe<span>(^{14+})</span> ions for collision energies from the respective ionization thresholds up to 3500 eV. The calculations use the fully relativistic subconfiguration-averaged distorted-wave approach and, partly, the more detailed level-to-level distorted wave method. We find that, unlike in previous work, our theoretical cross sections agree with our experimental ones within the experimental uncertainties, except for the near-threshold double-ionization cross sections. We attribute this remaining discrepancy to the neglect of direct-double ionization in the present theoretical treatment.</p><p>Experimental and theoretical cross sections for electron-impact single ionization of Xe<span>(^{12+})</span>.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 6","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjd/s10053-024-00854-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141254637","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}

{"title":"Angle-resolved linear polarization of characteristic lines following innershell (2p_{3/2}) photoionization of atoms","authors":"Z. W. Wu,&nbsp;W. Liu,&nbsp;S. Fritzsche","doi":"10.1140/epjd/s10053-024-00859-x","DOIUrl":"10.1140/epjd/s10053-024-00859-x","url":null,"abstract":"<p>In this paper, we aim to investigate angle-resolved linear polarization of the <span>(Lalpha _{1} , (3d_{5/2} !rightarrow ! 2p_{3/2}))</span>, <span>(Lalpha _{2} , (3d_{3/2} !rightarrow ! 2p_{3/2}))</span>, and <span>(Lell , (3s_{1/2} !rightarrow ! 2p_{3/2}))</span> characteristic lines following innershell <span>(2p_{3/2})</span> photoionization of selected neutral atoms with closed subshells by unpolarized or linearly polarized ionizing light within the framework of the density-matrix theory. To this aim, a relativistic single-configuration Dirac–Hartree–Fock approximation and the electric dipole approximation of the radiation fields are used to calculate the <span>(2p_{3/2})</span> photoionization amplitudes of those atoms, the alignment parameter of the photoionized <span>(2p^{-1}_{3/2})</span> hole state, and thus the angle-resolved linear polarization of the characteristic lines. It is found that the angle-resolved linear polarization of the <span>(Lalpha _{1, , 2})</span> and <span>(Lell )</span> lines behaves very differently for different polarization cases of the ionizing light under consideration. In addition, at given ionizing photon energies the <span>(Lalpha _{1})</span> line is found to be the least linearly polarized for all different ionizing polarization cases, whereas the linear polarization of both the <span>(Lalpha _{2})</span> and <span>(Lell )</span> lines is much stronger and, actually, rather close to each other despite always having opposite polarization signs. As the nuclear charge and the ionizing photon energy increase, moreover, each of these lines becomes more and more linearly polarized, respectively.</p><p>Linear polarization of the <span>(Lalpha _{1})</span> (top panels), <span>(Lalpha _{2})</span> (middle), and <span>(Lell )</span> (bottom) lines following innershell <span>(2p_{3/2})</span> photoionization of Ba (black solid lines), Yb (red dashed lines), Hg (blue dotted lines), and Rn (green dash–dotted lines) atoms by linearly polarized ionizing <span>(gamma )</span> light with <span>(P_{gamma } !=! 1)</span>, as functions of the emission angle <span>(theta _{0})</span>. Results are given for two different ionizing photon energies of 1.1 (left panels) and 4.0 (right) times their respective <span>(2p_{3/2})</span> ionization thresholds.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 6","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141259488","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}

{"title":"High repetition rate sub-ns electron pulses from pulsed-resonance Rydberg field-ionization (PRRFI)","authors":"R. Hahn,&nbsp;D. Comparat","doi":"10.1140/epjd/s10053-024-00851-5","DOIUrl":"10.1140/epjd/s10053-024-00851-5","url":null,"abstract":"<p>We demonstrate a novel technique, Pulsed-Resonance Rydberg Field-ionization (PRRFI), to generate low-energy electron bunches at high repetition rates. By combining continuous-wave laser excitation with a pulsed electric field, this method selectively ionizes Rydberg–Stark states in cesium atoms, producing sub-ns long electron bunches (down to <span>(sim !!{100},{textrm{ps}})</span>) at a repetition rate of <span>(sim !!{10},{textrm{MHz}})</span>. The method is demonstrated to offer significant advantages in terms of flexibility in the ionization repetition rate and pulse delay adjustments. The PRRFI method holds promises for applications in high-resolution electron microscopy and spectroscopy, potentially for overcoming the limitations of traditional electron sources in terms of brightness and energy spread.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 6","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141194490","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}

{"title":"Total cross section measurements of electron scattering from NH3 in the intermediate-energy region","authors":"Young Rock Choi,&nbsp;Nidhi Sinha,&nbsp;Mi-Young Song,&nbsp;Dae Chul Kim,&nbsp;Yonghyun Kim,&nbsp;Yeunsoo Park","doi":"10.1140/epjd/s10053-024-00862-2","DOIUrl":"10.1140/epjd/s10053-024-00862-2","url":null,"abstract":"<div><p>We present measurements of the total cross section (TCS) for electron scattering by ammonia in the energy range of 18.5 − 90 eV using a transmission attenuation technique. The overall TCS values were below 18.3 × 10^–16 cm² and exhibited a decreasing trend with increased electron energy within the measuring energy region. The total uncertainty of this measurement was evaluated to be in the range of 3.8 − 18.3%, which varied with the incident electron energies. The measured TCS values were mostly consistent with previous experimental and theoretical results, demonstrating the reliability of our experimental findings. Minor discrepancies observed in comparison with other studies at relatively high energy levels may be attributed to differences in the experimental conditions and uncertainties. This study highlights the significance of precise TCS measurements in enhancing our understanding of electron–molecule interactions in ammonia within the intermediate-energy range of 18.5 − 90 eV. Although an overall agreement exists between theory and experiment, there are still discrepancies, particularly at higher energies, warranting further investigation.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Total scattering cross section of NH₃</p></div></div></figure></div></div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 5","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141189216","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}

{"title":"Estimation of power in the controlled quantum teleportation through the witness operator","authors":"Anuma Garg,&nbsp;Satyabrata Adhikari","doi":"10.1140/epjd/s10053-024-00856-0","DOIUrl":"10.1140/epjd/s10053-024-00856-0","url":null,"abstract":"<p>Controlled quantum teleportation (CQT) can be considered as a variant of quantum teleportation in which three parties are involved where one party acts as the controller. The usability of the CQT scheme depends on two types of fidelities viz. conditioned fidelity and non-conditioned fidelity. The difference between these fidelities may be termed as power of the controller and it plays a vital role in the CQT scheme. Thus, our aim is to estimate the power of the controller in such a way so that its estimated value can be obtained in an experiment. To achieve our goal, we have constructed a witness operator and have shown that its expected value may be used in the estimation of the lower bound of the power of the controller. Furthermore, we have shown that it is possible to make the standard W state useful in the CQT scheme if one of its qubits either passes through the amplitude damping channel or the phase damping channel. We have also shown that the phase damping channel performs better than the amplitude damping channel in the sense of generating more power of the controller in the CQT scheme.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 5","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141153358","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}

{"title":"From certainty to chance: probabilistic insights into quantum control","authors":"Randa Herzallah,&nbsp;Abdessamad Belfakir","doi":"10.1140/epjd/s10053-024-00848-0","DOIUrl":"10.1140/epjd/s10053-024-00848-0","url":null,"abstract":"<p>This study introduces an innovative control methodology designed specifically for quantum physical systems. It bridges a critical gap by accounting for the full spectrum of uncertainties and noise that could affect the time evolution of these systems. In contrast to conventional methods, our pioneering approach utilizes probability density functions (pdfs) to characterize quantum dynamics, providing a more detailed and accurate description of their temporal behavior. We propose a strategy that seeks to minimize the discrepancy between the actual pdf, which encapsulates the combined dynamics of the quantum system and an external electric field, and a desired pdf that aligns with the system’s intended outcomes. This strategy marks a significant shift from traditional quantum control techniques. Initially, we present a solution for controlling quantum systems defined by general pdfs. This solution is then demonstrated on quantum systems described by Gaussian pdfs, with an in-depth account of the resulting optimized controller’s structure. The study culminates with practical demonstrations, showcasing the approach’s efficacy and practicality, thus endorsing its potential as a formidable instrument in quantum control.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 5","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjd/s10053-024-00848-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141138389","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}

{"title":"Electron-driven processes for perfluoronitriles","authors":"Nirav Thakkar,&nbsp;Dhaval Chauhan,&nbsp;Smruti Parikh,&nbsp;Chetan Limbachiya","doi":"10.1140/epjd/s10053-024-00858-y","DOIUrl":"10.1140/epjd/s10053-024-00858-y","url":null,"abstract":"<div><p>We report the results of the study on electron-driven molecular processes for the perfluoronitriles, C₃F₅N and C₄F₇N for a wide energy range, from the ionisation potential to 5000 eV. These compounds have been shown to have extremely low global warming potential, suggesting they could be useful in gas discharges and plasma reactors. Calculations of ionisation cross sections (<i>Q</i>_ion) are made using the complex scattering potential-ionisation contribution (CSP-ic) method and are shown to be in good agreement with the available data. Elastic (<i>Q</i>_el), inelastic (<i>Q</i>_inel) and total (<i>Q</i>_T) cross sections are computed through spherical complex optical potential formalism. We have recently developed two-parameter semi-empirical method (2p-SEM) for large molecules with 55 &lt; Z &lt; 95 to report <i>Q</i>_el and <i>Q</i>_T. This work is a maiden report of <i>Q</i>_el and <i>Q</i>_T for C₃F₅N and C₄F₇N. We present various correlation studies between the cross sections and target parameters, leading to a prediction of polarizability. We have derived dielectric constant using number density and molar mass and have correlated <i>Q</i>_ion (max) with dielectric constant.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 5","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141134411","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}

{"title":"Quantum information-theoretical analysis on the two-photon transitions in hydrogen isoelectronic ions under plasma confinement","authors":"S. Mondal,&nbsp;S. K. Chaudhuri,&nbsp;J. K. Saha,&nbsp;P. K. Mukherjee,&nbsp;B. Fricke","doi":"10.1140/epjd/s10053-024-00840-8","DOIUrl":"10.1140/epjd/s10053-024-00840-8","url":null,"abstract":"<p>Quantum information-theoretical measure in terms of Shannon and Fisher entropy in conjugate position and momentum spaces provides important information about the localization/delocalization patterns of the inter-atomic charge density under arbitrary confining environments. In this article, we have attempted to employ such measures to the ground, excited, and the virtual states arising out of two-photon transitions (<span>(1srightarrow nl)</span>; <span>(n=2-4)</span>, <span>(l=0,2)</span>) of weakly coupled classical plasma embedded H iso-electronic ions (nuclear charge, <span>(Z = 2 - 5)</span>). The wavefunction for the said states is essentially a linear combination of the Slater-type orbitals, the coefficients of which are generated from a fourth-order time-dependent perturbation theory within the variational framework. A complementary nature has been noted in the Shannon and Fisher measures versus the plasma screening parameter plot in the conjugate spaces. A novel scaling law has been proposed to replicate the variation of the Shannon and Fisher entropy <i>w.r.t.</i> <i>Z</i> for the virtual as well as real 2<i>p</i> states of free and plasma confined ions.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 5","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141140131","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}

{"title":"Refractive index for the mechanical refraction of a relativistic particle","authors":"Bikram Keshari Behera,&nbsp;Surendra Kumar Gour,&nbsp;Shyamal Biswas","doi":"10.1140/epjd/s10053-024-00849-z","DOIUrl":"10.1140/epjd/s10053-024-00849-z","url":null,"abstract":"<p>We have analytically determined the refractive index for the mechanical refraction of a relativistic particle for its all possible speeds. We have critically analysed the importance of Descartes’ metaphysical theory and extended it in this regard. We have considered the conservation of the tangential component of the relativistic momentum and the relativistic energy of the particle in the process of the mechanical refraction within the optical-mechanical analogy. Our result for the mechanical refractive index exactly matches with the forms of both the Fermat’s result on Snell’s law of optical refraction at the ultra-relativistic limit and the Descartes’ metaphysical result on the pseudo-Snell law of optical refraction at the non-relativistic limit.</p><p>Mechanical refraction from medium-1 to medium-2 for <span>(U2&gt;U1)</span></p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 5","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141054063","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}

{"title":"Radiative recombination of an electron on two protons: oscillator strengths","authors":"Tamaz Kereselidze,&nbsp;Irakli Noselidze,&nbsp;Zaal Machavariani","doi":"10.1140/epjd/s10053-024-00847-1","DOIUrl":"10.1140/epjd/s10053-024-00847-1","url":null,"abstract":"<p>The hydrogen molecular ion, <span>(H_2^+)</span>, is considered in the fixed nuclei approximation. The oscillator strengths relevant to free-bound transitions in <span>(H_2^+)</span> are presented as asymptotic expansions in an inverse power of the internuclear separation, which is assumed to be large. The asymptotic technique leads to an algebraic representation of the oscillator strengths, contrasting with numerical tables.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 5","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141054038","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}