Review
Astronomy & Astrophysics
Maria Fedotova, Dmitry Klimachkov, Arakel Petrosyan
Summary: This article introduces different models and reviews the latest magnetohydrodynamic theories of wave processes in rotating astrophysical plasma, considering important and common properties of astrophysical objects such as compressibility and stratification. It fills the gap in theoretical studies in the field of plasma astrophysics and contributes to improving numerical modeling schemes efficiency.
Article
Physics, Fluids & Plasmas
Pavel A. Andreev
Summary: Propagation of finite amplitude electromagnetic wave through partially spin-polarized degenerate plasmas causes instability due to interaction with small-frequency longitudinal spin-electron-acoustic waves. The strongest growth of instability occurs in high-density degenerate plasmas with Fermi momentum close to m_e c, where m_e is electron mass and c is speed of light. Increase of instability increment with the growth of plasma spin polarization is observed.
PHYSICS OF PLASMAS
(2023)
Article
Physics, Multidisciplinary
K. Jayaprakash, Prince Alex, Saravanan Arumugam, Perumal Murugesan, Thangjam Rishikanta Singh, Suraj Kumar Sinha
Summary: In this study, the Floating Potential Fluctuations (FPF) observed in a dc glow discharge plasma powered with two sources were successfully modeled using an anharmonic oscillator with two forcing terms. The dynamical features of the FPF were found to be associated with the formation and evolution of the anodic double layer (ADL). The experimentally and numerically obtained oscillations from the model showed strong agreement and can be extended for the description of complex systems driven by multiple forces.
Article
Mathematics, Interdisciplinary Applications
Ghulam Bary
Summary: In this research, the influence of temperature and momentum-dependent coherence and chaos radiations on particles emit fluid with quantum correlations was explored. The findings indicate that at specific temperatures, the fluid from relativistic collisions possesses hadronic phase and reveals the robustness of quantum coherence. The analysis of chaotic parameter and correlation functions reveals the variations of coherence and source characteristics with temperature ranges, particles number, and particle pairs averaging momentum.
CHAOS SOLITONS & FRACTALS
(2022)
Review
Multidisciplinary Sciences
Evgeny D. Filippov, Konstantin F. Burdonov, Tatiana A. Pikuz, Igor Yu. Skobelev
Summary: This article provides an overview of the application of X-ray self-emission methods for imaging hydrodynamic astrophysical phenomena in laboratory-scale experiments. The typical diagnostic approaches, their advantages, drawbacks, and application prospects are discussed. The methods prove to be valuable for studying various laboratory astrophysical problems with 2D and even 1D spatial resolution. They reveal the hydrodynamic evolution, spatial shape and structure, as well as important parameters such as electron density and plasma temperature of astrophysical objects and related phenomena, which are crucial for verifying astrophysical models.
Article
Astronomy & Astrophysics
Andras Pal, Masanori Ohno, Laszlo Meszaros, Norbert Werner, Jakub Ripa, Balazs Csak, Marianna Dafcikova, Marcel Frajt, Yasushi Fukazawa, Peter Hanak, Jan Hudec, Nikola Husarikova, Jakub Kapus, Miroslav Kasal, Martin Kolar, Martin Koleda, Robert Laszlo, Pavol Lipovsky, Tsunefumi Mizuno, Filip Munz, Kazuhiro Nakazawa, Maksim Rezenov, Miroslav Smelko, Hiromitsu Takahashi, Martin Topinka, Tomas Urbanec, Jean-Paul Breuer, Tamas Bozoki, Gergely Dalya, Teruaki Enoto, Zsolt Frei, Gergely Friss, Gabor Galgoczi, Filip Hroch, Yuto Ichinohe, Kornel Kapas, Laszlo L. Kiss, Hiroto Matake, Hirokazu Odaka, Helen Poon, Ales Povalac, Janos Takatsy, Kento Torigoe, Nagomi Uchida, Yuusuke Uchida
Summary: GRBAlpha is a 1U CubeSat that operates and collects scientific data on high-energy transients, making it the smallest astrophysical space observatory to date.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Physics, Fluids & Plasmas
Swarniv Chandra, Sharry Kapoor, Debapriya Nandi, Chinmay Das, Dayita Bhattacharjee
Summary: This study investigates electron acoustic waves in relativistic degenerate plasma by analyzing quantum hydrodynamic model and nonlinear Schrodinger equation. Bifurcation analysis and dynamical system studies are conducted to identify stability regime and chaotic scenario. The research is significant for theoretically predicting stable modes in solar plasma, stellar plasma, and laser plasma in the future.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2022)
Article
Physics, Multidisciplinary
Jason A. C. Gallas
Summary: This paper reports the observation of chirality in a classical scenario, where stable oscillations generate intricate structures with reflected symmetry on a mirror. These chiral pairs connecting families of oscillations in closed loops are expected to be easily detectable experimentally and are speculated to be a generic property of nonlinear oscillators governed by classical equations.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Physics, Fluids & Plasmas
Abel A. C. Recco, Julio C. Sagas, Paulo C. Rech
Summary: This paper investigates a periodically driven plasma oscillator modeled by a six-parameter nonhomogeneous second-order ordinary differential equation. By varying the amplitude and angular frequency of the driving, the dynamics of the system is analyzed. The (ω, A) parameter plane reveals the occurrence of multistability and the organization of periodic and chaotic attractors. Different types of periodic structures are observed in the chaotic region.
PHYSICS OF PLASMAS
(2023)
Article
Physics, Multidisciplinary
Wei-Han Hsiao
Summary: In this study, we investigate the marginal electromagnetic fluctuation in models of charged relativistic bosonic superfluids in three and two spatial dimensions at zero temperature using Gaussian approximation. The collective excitations in these systems are explored by integrating the superfluid velocity fields. The competition between different characteristic scales of speed and between short-ranged and long-ranged interactions leads to different collective mode dispersions.
Article
Quantum Science & Technology
Krzysztof Ptaszynski, Massimiliano Esposito
Summary: The entropy production in fermionic systems is mostly quantum due to the restriction on allowed measurements imposed by the parity superselection rule. In contrast, bosonic systems allow for a larger amount of classical correlations to be accessed through Gaussian measurements. This distinction suggests a quantum-to-classical transition in the microscopic formulation of entropy production.
Article
Mathematics, Applied
Michael Mekontchou Foudjio, Frank Thomas Ndjomatchoua, Carlos Lawrence Gninzanlong, Clement Tchawoua
Summary: The phenomenon of deterministic collective escape of particles from the cubic on-site potential well in the presence of both uniform damping and a periodic force is studied. Analytical techniques and numerical simulation showed that irregular motion induced by the periodic force can lead to strong energy localization on all particles, allowing them to collectively cross the energy barrier.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2022)
Article
Mathematics, Applied
Luana Santana, Rafael M. da Silva, Holokx A. Albuquerque, Cesar Manchein
Summary: By conducting extensive numerical experiments on two electrically interacting FitzHugh-Nagumo (FHN) neurons, we investigated the presence of chaotic and regular dynamics, transient chaos phenomenon, and multistability in parameter space. Our findings include the existence of self-organized stable periodic structures, transient chaos phenomenon causing long chaotic temporal evolution, and various multistable domains with an arbitrary number of attractors. Additionally, we demonstrated that chaos, transient chaos, and multistability persist even with different coupling strengths between identical FHN neurons.
Article
Astronomy & Astrophysics
P. Palmeri, J. Deprince, M. A. Bautista, S. Fritzsche, J. A. Garcia, T. R. Kallman, C. Mendoza, P. Quinet
Summary: This study calculates the modifications of ionization potentials and K-thresholds for abundant elements in plasma environments, and proposes improved universal fitting formulae for predicting these modifications. The results suggest that while the use of universal formulae is recommended for plasma modeling codes, their moderate to low accuracies may affect opacity predictions under extreme plasma conditions.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Thermodynamics
Muhammad Tahir Rashid, Junwei Li, Xinjian Chen, Anchen Song, Ningfei Wang
Summary: The study found that flow boiling of liquid n-heptane in a microtube under different flow rates and thermal gradients can affect heat transfer efficiency and pressure drop oscillation magnitude.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
