Article
Physics, Fluids & Plasmas
S. Ya. Bronin, E. V. Vikhrov, B. B. Zelener, B. V. Zelener
Summary: The influence of micro- and macro-fields on spectral lines in spatially inhomogeneous plasma is discussed. A distribution function of the electric field is derived, taking into account the plasma's inhomogeneity and non-neutrality. The calculated results for various regimes are presented and compared with experimental results for ultracold plasma. The dependence of the absorption coefficient on the distribution function is shown, suggesting the potential usefulness of these results for plasma diagnostics.
PHYSICS OF PLASMAS
(2023)
Article
Physics, Fluids & Plasmas
S. Ya Bronin, D. S. Korchagin, B. B. Zelener, B. Zelener
Summary: In this study, calculations of the ion microfield distribution function for a two-component fully ionized classical Coulomb plasma with ion charge numbers from two to three were conducted using the molecular dynamics method. The results were compared with calculations for other plasma models and can be applied to any classical non-degenerate strongly coupled plasma.
PHYSICS OF PLASMAS
(2021)
Article
Physics, Multidisciplinary
Sandrine Ferri, Olivier Peyrusse, Annette Calisti
Summary: This paper presents a Stark-Zeeman spectral line-shape model and numerical code, PPPB, which combines the PPP code with the MASCB code to provide fast and accurate line shapes for arbitrary atomic systems. The model accounts for various plasma conditions and includes ion dynamics and electron broadening effects. Potential applications of the model are demonstrated through calculations for different experimental conditions.
MATTER AND RADIATION AT EXTREMES
(2022)
Article
Physics, Multidisciplinary
Xiaomin Wang, Fei Ma, Bing Yao
Summary: This study examines a class of dense networks with a mixed degree distribution and small-world properties. In a random walk network with a trap fixed at a vertex with the highest degree, the mean first-passage time increases logarithmically with the number of vertices.
FRONTIERS IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
B. F. Kraus, Lan Gao, K. W. Hill, M. Bitter, P. C. Efthimion, T. A. Gomez, A. Moreau, R. Hollinger, Shoujun Wang, Huanyu Song, J. J. Rocca, R. C. Mancini
Summary: This study presents Hess line shapes measured with high spectral resolution from solid-density plasmas, showing features of Stark broadening and resolving the ambiguity between electron density and ion temperature through different dependencies. The analysis provides strong evidence that dense ions and electrons are not in thermal equilibrium, and suggests a new approach for studying ion-electron equilibration in dense plasmas.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Fluids & Plasmas
Nathaniel R. Shaffer, Charles E. Starrett
Summary: In this study, we used a newly developed electronic structure model that utilizes multiple scattering theory to solve the Kohn-Sham density functional theory equations for dense plasmas, in order to calculate the optical properties of hot dense plasmas. Additionally, the method was applied to experimental measurements of opacities for Cr, Ni, and Fe, and good agreement was found in the quasicontinuum region for Cr and Ni. However, the self-consistent plasma physics of the approach cannot explain the observed difference between models and the experiment for Fe.
Article
Optics
Shang-Yu Ren, Wei-Qiang Wang, Yu-Jie Cheng, Long Huang, Bing-Zheng Du, Wei Zhao, Guang-Can Guo, Lan-Tian Feng, Wen-Fu Zhang, Xi-Feng Ren
Summary: Dense quantum entanglement distribution is essential for practical quantum communication, quantum networks, and distributed quantum computation. In this study, we integrated a dense wavelength-division demultiplexing system and unbalanced Mach-Zehnder interferometers on a large-scale photonic chip to achieve multi-channel wavelength multiplexing entanglement distribution among distributed photonic chips. Our work demonstrates the feasibility and effectiveness of this integrated system and provides a path for practical applications of entanglement-based quantum key distribution and quantum networks.
Article
Physics, Fluids & Plasmas
Evgeny Stambulchik, Carlos A. Iglesias
Summary: Spectral line broadening by plasmas can be computed by solving the equation of motion for the radiating system in a fluctuating potential obtained from computer simulations. Previous calculations have focused on the dipole term in the multipole expansion, but higher multipoles and plasma perturbers overlapping the bound electron wave functions become important at higher densities. By using analytical formulas for atomic matrix elements, a computer simulation approach that considers the full radiator-plasma interaction is developed, removing strong collision divergences and accounting for the plasma polarization shift. The model is applied to hydrogenic argon spectral lines in a dense argon plasma, relevant to plasma diagnostic techniques.
Article
Physics, Applied
Dmitry Levko, Vivek Subramaniam, Laxminarayan L. Raja
Summary: We present a study on the transient generation of highly ionized argon microplasma using a self-consistent fluid plasma model coupled with the compressible Navier-Stokes equations. The plasma is formed within a micrometer-sized cathode spot immediately after intense secondary electron emission from the cathode, and it exists for approximately 10 ns. The electron pressure within the microplasma exceeds the background gas pressure by several times, and the mechanisms of energy transfer from the plasma to heavy species are discussed. A compression wave generated by localized gas heating propagates from the cathode to the anode.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Astronomy & Astrophysics
Jing Zhou, Zhi-Yu Zhang, Yu Gao, Junzhi Wang, Yong Shi, Qiusheng Gu, Chentao Yang, Tao Wang, Qing-Hua Tan
Summary: Both Galactic and extragalactic studies show that stars form directly from dense molecular gas. HCN and HCO+ J = 1 -> 0 have been commonly used to trace such dense gas, but they may be influenced by low volume density gas. Therefore, the HCN J = 2 -> 1 and HCO+ J = 2 -> 1 transitions are better in tracing the dense gas related to star formation.
ASTROPHYSICAL JOURNAL
(2022)
Article
Physics, Fluids & Plasmas
Masayasu Hata, Takayoshi Sano, Yasuhiko Sentoku, Hideo Nagatomo, Hitoshi Sakagami
Summary: The study shows that the propagation of whistler waves in strongly magnetized plasma is significantly restricted by stimulated Brillouin scattering, with the propagation time of whistler waves in overcritical plasma being proportional to the growth time of ion-acoustic waves via the Brillouin instability.
Article
Physics, Fluids & Plasmas
Menahem Krief
Summary: In this work, systematic methods for analyzing the number of relativistic electronic configurations in high-density plasmas of intermediate or high-Z elements are presented. Two useful methods for estimating the number of populated configurations are discussed, as well as the effects of temperature and density on the number of configurations are explained. Comprehensive average-atom finite-temperature density functional theory (DFT) calculations are performed to study the mechanisms leading to the huge number of populated configurations in different plasmas.
Article
Astronomy & Astrophysics
Takahisa Igata, Yohsuke Takamori
Summary: This study investigates periapsis shifts in the dark matter distribution with a dense core. The research modelled the distribution as an isotropic gas sphere and utilized the Emden polytropic sphere. The findings reveal that competing effects of general relativity and local-density of matter influence the bounded motion, resulting in retrograde periapsis shifts near the center and prograde shifts in the far region.
Article
Biochemistry & Molecular Biology
Erzhong Wu, Xuzhen Guo, Xueyi Teng, Ruijin Zhang, Fahui Li, Ya Cui, Dongdong Zhang, Qinghua Liu, Jianjun Luo, Jiangyun Wang, Runsheng Chen
Summary: Researchers have found that RNA can bind to the plasma membrane, but the specific mechanism is still unclear. By using high-throughput sequencing and in situ labeling methods, a variety of plasma membrane-related RNAs were identified, with lncRNA PMAR72 showing high affinity with sphingomyelin.
CELL BIOCHEMISTRY AND BIOPHYSICS
(2021)
Article
Astronomy & Astrophysics
Rose F. P. Waugh, Moira M. Jardine
Summary: This study focuses on the magnetic confinement of dense plasma in rapidly rotating solar-like stars. By creating a model, the researchers are able to generate cooled magnetic loops that are in equilibrium with the coronal magnetic field. They calculate the masses of these loops and find that magnetic confinement of material is common in rapidly rotating stars.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
