The European Physical Journal D最新文献

{"title":"Characteristics, implementation, and applications of special perfect entanglers","authors":"Karthick Selvan,&nbsp;S. Balakrishnan","doi":"10.1140/epjd/s10053-024-00925-4","DOIUrl":"10.1140/epjd/s10053-024-00925-4","url":null,"abstract":"<p>In this paper, we discuss the characteristics of special perfect entanglers from a new perspective, present the results obtained from the implementation of special perfect entangler circuits using cross-resonance interaction, and discuss their applications. First, we show that the entangling power of a two-qubit gate is proportional to the mean squared length of the chords present in the argand diagram of squared eigenvalues of the nonlocal part of the gate, and derive the entangling characteristics of special perfect entanglers from the argand diagram associated with them. Next, we discuss the implementation of a single-parameter special perfect entangler circuit in an IBM quantum processor. We implement the circuit for nine different parameters using two methods. In the first method, we use two echoed cross-resonance gates for implementation, and in the second method, we use pulse-level programming to define the pulse sequence of part of the circuits. For a particular input state, we perform quantum state tomography, calculate state fidelity and concurrence of the output density matrices, and compare the results obtained in both methods of implementation. We also measure the average gate fidelity for the B gate circuit. We construct a universal two-qubit quantum circuit using the special perfect entangler circuit. This universal circuit can be used to generate all two-qubit gates in IBM quantum processors. We also show that <span>((n-1))</span> B gate circuits can be used to generate <i>n</i>-qubit GHZ and perfect W states. We generate three-qubit perfect W state in IBM quantum processor. Perfect W state generated using pulse-level programming shows better fidelity than the state generated using four echoed cross-resonance gates.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 11","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664467","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":"Enhanced thermoelectric properties of zinc porphyrin dimers-based molecular devices","authors":"Dhia Saiwan Preesam,&nbsp;Hossain Milani Moghaddam,&nbsp;Mohammed Deia Noori","doi":"10.1140/epjd/s10053-024-00932-5","DOIUrl":"10.1140/epjd/s10053-024-00932-5","url":null,"abstract":"<div><p>In this study, we investigated the electrical and thermoelectric properties of the zinc porphyrin dimer and the double-dimer zinc porphyrin molecular junctions using density functional theory (DFT) combined with the non-equilibrium Green’s function method. Our results demonstrate that the electronic transport and thermoelectric properties of these junctions can be significantly improved in the presence of another dimer. By adding a new zinc porphyrin dimer, the electrical conductance (G) increased up to an order of magnitude and showed further enhancement in the Seebeck coefficient for a good range of Fermi energies. However, the situation is the opposite in the case of the structure of zinc porphyrin dimer without any additives. These results imply that through modifications in the molecular configuration, there exists a promising potential for enhancing the figure of merit (<i>ZT</i>) value, thereby these systems can be potentially utilized to increase the opportunities for versus application in molecular-scale thermoelectric energy generators we conducted a comparative analysis between the zinc porphyrin dimer and the double-dimer zinc porphyrin molecular junctions.</p><h3>Graphic abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Zinc porphyrin dimers-based molecular wire</p></div></div></figure></div></div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 11","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636675","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":"Investigation of structural, IR spectral, thermodynamics and excitation property alterations in (AlN)12 cluster under external electric fields","authors":"Jie Yang,&nbsp;Nuerbiye Aizez,&nbsp;Jiajun Ma,&nbsp;Gulimire Yaermaimaiti,&nbsp;Abduhalik Kadir,&nbsp;Xiaoning Wang,&nbsp;Huan An,&nbsp;Bumaliya Abulimiti,&nbsp;Mei Xiang","doi":"10.1140/epjd/s10053-024-00911-w","DOIUrl":"10.1140/epjd/s10053-024-00911-w","url":null,"abstract":"<div><p>In recent years, there has been a growing global interest in ultra-wide bandgap semiconductor materials, with aluminium nitride emerging as a particularly promising material. Using density-functional theory (DFT) at the CAM-B3LYP/6-311G(3d,2p) basis set level, we have systematically optimized the geometries of the (AlN)₁₂ cluster. Furthermore, the structural and thermodynamic changes of these clusters under the external electric field (EEF) were investigated. When the external electric field intensity increased the energy gap decreases continuously, infrared spectral analysis showed an obvious Stark effect, and the molecular structure showed significant alterations. Additionally, the study examined orbital compositions and excitation properties of twenty excited states using time-dependent density-functional theory (TD-DFT). The results indicated a decrease in excitation energy with increasing EEF, resulting in longer wavelengths and red-shifted spectral. These findings provide an opportunity to precisely modulate the electronic properties of (AlN)₁₂ cluster by controlling the strength and direction of the EEF, opening up more possibilities for their application in photoelectronic devices.</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 11","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636674","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":"Topological effects of cosmic string on radial eigenvalue solution with Mie-type potential","authors":"Faizuddin Ahmed","doi":"10.1140/epjd/s10053-023-00749-8","DOIUrl":"10.1140/epjd/s10053-023-00749-8","url":null,"abstract":"<p>In this contribution, we study the non-relativistic Schrödinger equation with the interaction potential of Mie-type in the background of the topological defects produced by a cosmic string. We determine the radial eigenvalue solution and analyze the effects of the topological defect. It is shown there that the energy levels and wave function of the non-relativistic quantum particles get modified by the topological defect of the geometry compared to the flat space result with this potential. Afterwards, this eigenvalue solution is utilized in some well-known molecular potential models (Kratzer, modified Kratzer, Coulomb potentials), and presents the eigenvalue solutions.</p><p>The time-independent Schrodinger wave equation with potential <span>((V(r)=frac{delta }{r}+frac{gamma }{r}^{2} +V_{0}))</span> in curved space is described by the wave equation <span>(left[ -frac{1}{2,M}frac{1}{sqrt{g}}partial _{i}(sqrt{g}g^{ij}partial _{j})+left( frac{delta }{r}+frac{gamma }{r}^{2} +V_{0}right) right] Psi =E Psi )</span>.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 9","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4447492","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":"Publisher Correction: The spectroscopic and transition properties of quadruply ionized bismuth: Bi V","authors":"Neelam Kumari Arya,&nbsp;A. Tauheed","doi":"10.1140/epjd/s10053-023-00747-w","DOIUrl":"10.1140/epjd/s10053-023-00747-w","url":null,"abstract":"","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 9","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4063032","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":"Dissociative electron attachment and dissociative ionization of CF3AuCNC(CH3)3, a potential FEBID precursor for gold deposition","authors":"Ali Kamali,&nbsp;Will G. Carden,&nbsp;Jodie V. Johnson,&nbsp;Lisa McElwee-White,&nbsp;O. Ingólfsson","doi":"10.1140/epjd/s10053-023-00721-6","DOIUrl":"10.1140/epjd/s10053-023-00721-6","url":null,"abstract":"<div><p>Appreciable effort is currently committed to designing suitable organometallic precursors for fabrication of metallic nanostructures with focused electron beam induced deposition (FEBID)—a direct write method with high potential for 3D patterning. In this context, the initial interaction of the potential precursor with low energy electrons is critical and the extent of electron-induced ligand loss determines the composition of the resulting deposits. Specifically of interest are gold-containing precursors, as the optoelectronic properties of gold provide potential for a variety of plasmonic and light enhancing applications of 3D nanostructures. Here, we study low energy electron-induced fragmentation of CF₃AuCNC(CH₃)₃ through dissociative ionization (DI) and dissociative electron attachment (DEA) in the gas phase under single collision conditions and under conditions where collisional stabilization is provided. We further compare the fragmentation patterns observed under these conditions with the composition of deposits formed from this precursor under FEBID conditions. In DI, a significant difference in relative intensities is found under single collision conditions as compared to conditions where collisional stabilization is provided, while under both these conditions, only the same DEA channel is open. Comparison with the composition of deposits formed under FEBID conditions shows that the initial electron-induced fragmentation processes are not directly reflected in the deposit’s composition. Rather, we expect these to determine the initial composition of immobilized fragments, while the final composition of the deposit is determined by electron-induced secondary and tertiary reactions caused by further irradiation after immobilization.</p><h3>Graphical abstract</h3>\u0000 <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\u0000 </div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 8","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4636645","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":"Improve the performance of reference-frame-independent measurement-device-independent quantum key distribution with heralded single-photon sources","authors":"Ling Zhou,&nbsp;Zhenhua Li,&nbsp;Jipeng Wang,&nbsp;Zhongqi Sun,&nbsp;Yue Li,&nbsp;Haiqiang Ma","doi":"10.1140/epjd/s10053-023-00737-y","DOIUrl":"10.1140/epjd/s10053-023-00737-y","url":null,"abstract":"<div><p>The performance degradation of reference-frame-independent measurement-device-independent quantum key distribution (RFI-MDI-QKD) protocol caused by the finite key size effect impedes its practical implementation. The protocol utilizes the double-scanning method, which makes it possible to precisely estimate both the counts of single-photon pairs and the phase-flip error. This method effectively counteracts the statistical fluctuation brought on by the finite key size effect. Based on this method, we propose a scheme in this work that substitutes heralded single-photon sources (HSPS) for weak coherent sources (WCS), and we compare the performance of the two schemes by calculating the key rate. The RFI-MDI-QKD using HSPS, according to the results of the simulation, has a lower key rate than the RFI-MDI-QKD using WCS, but it also has a longer transmission distance and a more noticeable improvement in transmission distance at larger rotation angles. Thus, we demonstrate that the RFI-MDI-QKD protocol, based on the double-scanning method and using HSPS, has promising future application potential.</p></div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 8","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4487447","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":"Theoretical study on dielectronic recombination process and X-ray line polarization of B-like Ar13+ ion","authors":"Sheng-Bo Niu,&nbsp;Yu-Long Ma,&nbsp;Wen-Liang He,&nbsp;Lu-You Xie,&nbsp;Chen-Zhong Dong","doi":"10.1140/epjd/s10053-023-00732-3","DOIUrl":"10.1140/epjd/s10053-023-00732-3","url":null,"abstract":"<div><p>Theoretical investigations of <i>K-</i>shell Δ<i>n</i>?=?1 (1<i>s</i>?→?2<i>l</i>) dielectronic recombination (DR) of B-like Ar¹³⁺ ions are performed. The resonance energies, autoionization and radiative rates, as well as DR strengths, are obtained with inclusion of Breit and QED corrections using the Flexible Atomic Code. Furthermore, the differential cross sections, linear polarization, and polarization-dependent spectra for <i>KLL</i> DR process are presented for X-ray dielectronic satellite lines. The present results indicate the importance of high-order trielectronic and quadruelectronic recombination.</p><h3>Graphical abstract</h3>\u0000 <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\u0000 </div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 8","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4373004","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":"Electron-driven processes from single collisions to high-pressure plasmas","authors":"Jose L. Lopez,&nbsp;Michael Brunger,&nbsp;Holger Kersten","doi":"10.1140/epjd/s10053-023-00739-w","DOIUrl":"10.1140/epjd/s10053-023-00739-w","url":null,"abstract":"","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 8","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjd/s10053-023-00739-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4375313","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":"Carbon nanotubes with point defects produced by ionizing radiation: a study using DFTB","authors":"Inés María Macías Labrada,&nbsp;Luis Ignacio Estévez Baños,&nbsp;Daniel Codorniu Pujals,&nbsp;Maykel Márquez Mijares","doi":"10.1140/epjd/s10053-023-00735-0","DOIUrl":"10.1140/epjd/s10053-023-00735-0","url":null,"abstract":"<p>The effect of the ionizing radiation on the structure and properties of carbon nanotubes (CNTs) is of great theoretical and practical interest, due to their potential applications in the electronics and other fields, including nuclear energy. Although several investigations have been devoted to this issue in the last years, many aspects of that interaction are still not well understood. With the objective of achieving a better understanding of these processes, in the present work the density functional based tight binding method is used to study CNTs of single and multiple layers, in which the kind of defects that typically appear under the action of the radiation (vacancies, divacancies, Stone-Wales defects and other) were introduced. The results related with the energy of formation of those defects and the geometric and energy modifications that take place in the CNTs with different chirality and number of layers are presented.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 8","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4286416","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}