Article
Physics, Nuclear
Ruijia Li, Chang Xu
Summary: We used a three-dimensional approach to study the quasistationary states of highly deformed α emitters. The 3D α-cluster decay width was determined by splitting the anisotropic 3D potential into internal and external parts and considering the initial wave function of an anisotropic harmonic oscillator potential and the nonresonance scattering wave function of the Coulomb potential. Significant differences between the one-dimensional and three-dimensional decay widths were observed for typical α emitters with large quadrupole and hexadecapole deformations.
Article
Physics, Nuclear
Jun-Hao Cheng, Yi Li, Tong-Pu Yu
Summary: In this study, the effect of ultra-intense laser fields on proton radioactivity of deformed proton emitters was systematically investigated using a state-of-the-art Gaussian laser and the latest evaluated nuclear properties table. The results show that the ultra-intense laser fields can change the proton radioactivity half-life by modifying the proton radioactivity penetration probability, with 108I being the most sensitive parent nucleus to the strong laser pulse. Furthermore, it was found that the released energy of proton radioactivity is inversely related to the rate of change of the proton radioactivity penetration probability. Finally, the effect of asymmetric chirp-laser pulse on the average rate of change in proton radioactivity penetration probability was examined, indicating that the rational use of positive chirp is equivalent to increasing the laser intensity by two orders of magnitude.
Article
Computer Science, Interdisciplinary Applications
Guilherme S. Costa, Silvio C. Ferreira
Summary: Epidemic processes on random graphs or networks show localization of activity, which can be effectively addressed by the Quasistationary method. However, simpler approaches like the Reflecting Boundary Condition are not sufficient to capture the localization effects. A proposed method that reactivates nodes based on their previous activity time outperforms both the standard Quasistationary and Reflecting Boundary Condition methods, offering a simpler and more efficient tool for analyzing localization on heterogeneous structures.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
Article
Astronomy & Astrophysics
S. Mouslih, M. Jakha, S. El Asri, S. Taj, B. Manaut, R. Benbrik, E. A. Siher
Summary: This paper investigates the decay of charged Higgs bosons in the type-II two-Higgs-doublet model under the influence of a circularly polarized electromagnetic field. The calculations utilize the Furry picture approach and exact solutions for charged particles in the presence of the electromagnetic wave field. The results provide an exact analytic expression for the decay width and analyze the modifications in different decay modes under superstrong fields.
Article
Physics, Multidisciplinary
S. Mouslih, M. Jakha, I Dahiri, S. Taj, B. Manaut, E. Siher
Summary: Most studies at electron-positron colliders have focused on W and Z bosons, which are important for the Standard Model theory and exploring new physics. A recent study found that lasers have a significant effect on the decay of Z bosons. In this work, the researchers investigated the decay of W- bosons in the presence of a circularly polarized electromagnetic field and found that lasers can reduce the probability of decay.
Article
Astronomy & Astrophysics
Feng Feng, Yingsheng Huang, Yu Jia, Wen-Long Sang, Xiaonu Xiong, Jia-Yue Zhang
Summary: This paper presents a model-independent framework to study the inclusive production of fully charmed tetraquark states in hadron colliders. Using the QCD factorization theorem and known physical parameters, differential production rates for T-4c (0(++) and 2(++)) at high momentum are predicted.
Article
Multidisciplinary Sciences
Iu Kochetkov, N. D. Bukharskii, M. Ehret, Y. Abe, K. F. F. Law, V Ospina-Bohorquez, J. J. Santos, S. Fujioka, G. Schaumann, B. Zielbauer, A. Kuznetsov, Ph Korneev
Summary: By using a trained neural network, the magnetic field value can be read from experimental data, greatly facilitating the interpretation of experimental results. This study also suggests that a short sub-picosecond laser pulse can generate a quasi-stationary magnetic field structure living on a hundred picosecond time scale, when the induced current forms a closed circuit.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Nuclear
R. D. Harding, A. N. Andreyev, A. E. Barzakh, J. G. Cubiss, P. Van Duppen, M. Al Monthery, N. A. Althubiti, B. Andel, S. Antalic, T. E. Cocolios, T. Day Goodacre, K. Dockx, G. J. Farooq-Smith, D. Fedorov, V. N. Fedosseev, D. A. Fink, L. P. Gaffney, L. Ghys, J. D. Johnson, D. T. Joss, M. Huyse, N. Imai, K. M. Lynch, B. A. Marsh, Y. Martinez Palenzuela, P. L. Molkanov, G. G. O'Neill, R. D. Page, R. E. Rossel, S. Rothe, M. D. Seliverstov, S. Sels, C. Van Beveren, E. Verstraelen
Summary: A study of laser-ionized and mass-separated neutron-deficient isotopes Au-176, Au-177, and Au-179 at ISOLDE, CERN, provided new insights into the complex fine-structure alpha decays of these isotopes and the properties of their daughter nuclei Ir-172, Ir-173, and Ir-175, as well as beta-decay daughter products Pt-177 and Pt-179. The study also deduced nuclear magnetic moments for high- and low-spin alpha-decaying states of Au-176, proposing probable spins and configurations based on the results.
Article
Optics
Konstantin N. Lyashchenko, Oleg Yu Andreev, Deyang Yu
Summary: In this theoretical study, the process of two-electron one-photon (TEOP) transitions in a He-like sequence of atomic ions from boron to uranium is considered. Transition probabilities and energies are calculated within the Quantum Electrodynamics (QED) theory, with calculations performed in various gauges. The intensity ratios between TEOP transitions and other major transitions are presented.
Article
Astronomy & Astrophysics
Ting-Yan Li, Long Tang, Zheng-Yuan Fang, Chao-Hui Wang, Cheng-Qun Pang
Summary: In this paper, the characteristics of higher Bc mesons, including mass spectra and decays, were studied using the Cornell potential model which considers the screening effect. Valuable conclusions were obtained by comparing the results with experimental data.
Article
Physics, Nuclear
B. D. C. Kimene Kaya, T. T. Ibrahim, S. M. Wyngaardt
Summary: The properties of the 216Rn nucleus were investigated using different models, and the results were in accordance with the experimental data.
Article
Physics, Fluids & Plasmas
Antonio Rodriguez, Fernando D. Nobre, Constantino Tsallis
Summary: The study examines the duration of quasistationary states in a d-dimensional classical inertial alpha-XY model, showing that the duration follows a critical phenomenon as the energy approaches a critical value. Universal behavior with a critical exponent xi around 5/3 is observed throughout the long-range interaction regime.
Article
Optics
Savannah Garmon, Kenichi Noba
Summary: The study focuses on a model with a PT-symmetric trimer coupled to two semi-infinite SSH leads, revealing different types of zero-energy modes and breaking of PT-symmetry. Within the parameter space corresponding to the topologically nontrivial phase, a gap opens in the eigenvalue spectrum indicating symmetry breaking, while increasing gamma leads to further localization of eigenstates. At boundary points, exceptional points can form, including higher-order EPs involving localized zero-energy states that exhibit characteristic dynamics in an evolution experiment.
Article
Astronomy & Astrophysics
K. Wimmer, P. Ruotsalainen, S. M. Lenzi, A. Poves, T. Huyuk, F. Browne, P. Doornenbal, T. Koiwai, T. Arici, K. Auranen, M. A. Bentley, M. L. Cortes, C. Delafosse, T. Eronen, Z. Ge, T. Grahn, P. T. Greenlees, A. Illana, N. Imai, H. Joukainen, R. Julin, A. Jungclaus, H. Jutila, A. Kankainen, N. Kitamura, B. Longfellow, J. Louko, R. Lozeva, M. Luoma, B. Mauss, D. R. Napoli, M. Niikura, J. Ojala, J. Pakarinen, X. Pereira-Lopez, P. Rahkila, F. Recchia, M. Sandzelius, J. Saren, R. Taniuchi, H. Tann, S. Uthayakumaar, J. Uusitalo, V. Vaquero, R. Wadsworth, G. Zimba, R. Yajzey
Summary: Excited states in Ga-62 and Ge-62 nuclei with Tz = 0, -1 were studied using direct reactions and fusion-evaporation reactions. New excited states were discovered and compared with theoretical predictions. In addition, the relationship between mirror and triplet energy differences was analyzed.
Article
Quantum Science & Technology
Steven Abel, Michael Spannowsky
Summary: The researchers have developed a quantum annealing simulation platform to observe and study dynamical processes in quantum field theory, demonstrating its potential application for encoding QFTs. The results show promise for using this novel method to study quantum systems and improve theoretical and computational methods.
Article
Optics
S. Popruzhenko, T. A. Lomonosova
Summary: The theory formulates a semiclassical analytic approach to describe the excitation of atomic Rydberg states by intense laser radiation in the multiphoton limit of ionization. By separating the electron motion in the laser field and Coulomb field of the nucleus, it allows for the calculation of classical cut-off positions in the distribution of excited atoms in principal and orbital quantum numbers, and the identification of the effects of quantum interference.
LASER PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Tatyana Liseykina, Andrea Macchi, Sergey Popruzhenko
Summary: The interaction of superintense circularly polarized laser pulses with high-density plasmas can generate strong quasistatic magnetic fields via the absorption of photon angular momentum, known as the inverse Faraday effect. By improving classical modeling with a modified radiation friction force considering quantum effects, it is found that quantum effects can reduce the conversion rate of laser radiation into high-energy photons by 2-3 times, suppressing the magnetic field amplitude accordingly. The non-monotonic behavior of the quantum suppression factor is influenced by the longitudinal plasma acceleration and radiation reaction force.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Quantum Science & Technology
E. Peik, T. Schumm, M. S. Safronova, A. Palffy, J. Weitenberg, P. G. Thirolf
Summary: The low-energy, long-lived isomer in Th-229 has inspired physicists to explore multidisciplinary research and to develop a highly precise nuclear clock to test fundamental physics principles. In addition, plans are in place to use the nuclear clock for searches of variations in electromagnetic and strong coupling constants, as well as for dark matter studies.
QUANTUM SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
S. V. Popruzhenko, T. A. Lomonosova
Summary: This study examines the shape of momentum distributions of doubly charged ions produced during the ionization of atoms in an intense low-frequency circularly polarized laser field. It demonstrates that sequential and collective tunneling pathways lead to qualitatively different momentum distributions of the ions. These findings could be useful for experimental investigations into the collective tunneling effect in atoms.
Article
Physics, Multidisciplinary
Helena Drueeke, Dieter Bauer
Summary: Investigations on harmonic spectra from finite, hexagonal nanoribbons like graphene and hexagonal boron nitride in armchair and zig-zag configuration reveal the role of system symmetry in determining the existence and intensity of emitted harmonics.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2021)
Article
Physics, Multidisciplinary
Marco S. Kirsch, Yiqi Zhang, Mark Kremer, Lukas J. Maczewsky, Sergey K. Ivanov, Yaroslav V. Kartashov, Lluis Torner, Dieter Bauer, Alexander Szameit, Matthias Heinrich
Summary: Higher-order topological insulators represent a novel topological phase with boundary modes characterized by a unique co-dimension of at least two. Despite promising preliminary considerations, experimental research on these systems has been limited to linear evolution of topological states, with observation of the interplay between nonlinearity and dynamics of higher-order topological phases remaining elusive. However, experimental demonstration of nonlinear higher-order topological corner states and observation of soliton formation in such structures could pave the way for exploring topological properties of matter in the nonlinear regime and potentially lead to the development of compact devices harnessing the intriguing features of topology.
Article
Physics, Multidisciplinary
Yuanbin Wu, Simone Gargiulo, Fabrizio Carbone, Christoph H. Keitel, Adriana Palffy
Summary: The research presents a protocol to control the nuclear decay of isomeric nuclear using specially designed and reshaped electron vortex beams. Experimental results show that the use of tailored electron vortex beams can significantly increase the nuclear decay rate of isomers. These findings open up new prospects for manipulating the interplay between atomic and nuclear degrees of freedom.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
S. Popruzhenko, D. Tyurin
Summary: This study examines the ionization process in intense electromagnetic fields using quantum orbits, investigating the concept of ionization time and electron escape probability from barriers under high electric field strengths. The research shows that the common conjecture holds true under certain conditions, but a small non-adiabatic time shift occurs for laser pulses of arbitrary shape.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
News Item
Optics
Dieter Bauer
Article
Optics
Lina Bielke, Christoph Juerss, Vincent Burgtorf, Dieter Bauer
Summary: In frequently studied two-band models for solid-state high-order harmonic generation, the wavelength range of interband harmonics can theoretically extend from the minimum to the maximum band gap. However, there is a laser-intensity-dependent cutoff that may occur at a lower energy level than the maximum band gap, unless the laser intensity is high enough for electrons to explore the entire Brillouin zone. This cutoff is formed by destructive interference of electron emissions from different initial states in the Brillouin zone. Our findings, based on calculations for Su-Schrieffer-Heeger chains, are applicable to other two-band systems as well. The completeness of destructive interference and formation of the cutoff depend on the fine sampling of the Brillouin zone or the sufficient length of the finite chain in position space.
Article
Materials Science, Multidisciplinary
Christoph Juerss, Dieter Bauer
Summary: Edge states play an important role in the electron dynamics of two-dimensional topological insulators. This work compares the numerically simulated high-harmonic generation in the bulk of the Haldane model to the generation in finite flakes with edge states, explaining the differences. The results show that peaks for energies below the bulk band gap appear in the spectra of finite flakes, with the positions of these peaks depending strongly on the size of the flakes.
Article
Physics, Multidisciplinary
Yu-Hsueh Chen, Po-Han Lin, Guan-Ying Wang, Adriana Palffy, Wen-Te Liao
Summary: The enhancement of x-ray-matter interaction by guiding and focusing radiation from x-ray free electron lasers is investigated theoretically. It is shown that elliptical waveguides using a cladding material with a high atomic number can maintain an x-ray intensity of up to three orders of magnitude larger than in free space. This feature can be used to place a nuclear sample in the waveguide focal area and drive nuclear Mossbauer transitions up to transient nuclear population inversion.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Nuclear
Tobias Kirschbaum, Nikolay Minkov, Adriana Palffy
Summary: This study theoretically investigates the population of the 8 eV Th-229m isomer through coherent x-ray pulses in the second nuclear excited state at 29.19 keV. Two nuclear coherent population transfer schemes, using stimulated Raman adiabatic passage and successive pi pulses, are focused on. Numerical results indicate that the Gamma Factory approach is the most promising scenario for efficient isomer population. The study also provides theoretically predicted values for nuclear transition probabilities and discusses them in relation to recent experiments.
Article
Physics, Multidisciplinary
David Elsing, Adriana Palffy, Yuanbin Wu
Summary: A quantum plasma screening model was used to theoretically investigate thermonuclear reactions in laser-generated plasmas. The results show that quantum effects can enhance plasma screening for thermonuclear reactions up to one order of magnitude, which can have significant implications for nuclear astrophysics predictions and fusion energy prospects.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Optics
Mihai A. Macovei, Adriana Palffy
Summary: The study investigates the multiphonon quantum dynamics in laser-pumped cavity optomechanical samples containing a vibrating mirror, focusing on dispersive interaction regimes. The research demonstrates efficient ways to monitor the phonon quantum dynamics via photon detection, and discusses the possibility of extracting relevant sample parameters such as the coupling strength between the mechanical mirror and the electromagnetic field.
