Zobrazeno 1 - 10
of 5 679
pro vyhledávání: '"Luis, O"'
Autor:
Palafox, Sergio, Silva, Luis O.
This work tackles the problem of spectral characterization of a class of infinite matrices arising from the modelling of small oscillations in a system of interacting particles. The class of matrices under discussion corresponds to the infinite March
Externí odkaz:
http://arxiv.org/abs/2410.16782
Relativistic plasmas in strong electromagnetic fields exhibit distinct properties compared to classical plasmas. In astrophysical environments, such as neutron stars, white dwarfs, AGNs, and shocks, relativistic plasmas are pervasive and are expected
Externí odkaz:
http://arxiv.org/abs/2409.18955
Autor:
Pineda, Flavio, Pimentel, Luis O.
We investigate the non-perturbative production of scalar particles within the Higgs-$R^2$ inflation model, focusing on a massive spectator field that interacts gravitationally via a non-minimal coupling to the Ricci scalar $R$. By transforming the mo
Externí odkaz:
http://arxiv.org/abs/2409.09999
Autor:
Ewart, Robert J., Nastac, Michael L., Bilbao, Pablo J., Silva, Thales, Silva, Luís O., Schekochihin, Alexander A.
Generic equilibria are derived for turbulent relaxing plasmas via an entropy-maximization procedure that accounts for the short-time conservation of certain collisionless invariants. The conservation of these collisionless invariants endows the syste
Externí odkaz:
http://arxiv.org/abs/2409.01742
Autor:
Ruskov, Rusko T., Bingham, Robert, Silva, Luis O., Harper, Max, Aboushelbaya, Ramy, Myatt, Jason F., Norreys, Peter A.
There is renewed interest in direct-drive inertial confinement fusion, following the milestone December 2022 3.15 MJ ignition result on the National Ignition Facility. A key obstacle is the control of the two plasmon decay instability. Here, recent a
Externí odkaz:
http://arxiv.org/abs/2404.17384
Publikováno v:
Phys. Plasmas 1 May 2024; 31 (5): 052112
We study how radiation reaction leads plasmas initially in kinetic equilibrium to develop features in momentum space, such as anisotropies and population inversion, resulting in a ring-shaped momentum distribution that can drive kinetic instabilities
Externí odkaz:
http://arxiv.org/abs/2404.11586
Autor:
Rovige, Lucas, Cruz, Filipe D., Dorst, Robert S., Pilgram, Jessica J., Constantin, Carmen G., Vincena, Stephen, Cruz, Fábio, Silva, Luis O., Niemann, Christoph, Schaeffer, Derek B.
Mini-magnetospheres are small ion-scale structures that are well-suited to studying kinetic-scale physics of collisionless space plasmas. Such ion-scale magnetospheres can be found on local regions of the Moon, associated with the lunar crustal magne
Externí odkaz:
http://arxiv.org/abs/2402.05043
A few years ago, a topological quantum phase transition (TQPT) has been found in Anderson and Kondo 2-channel spin-1 impurity models that include a hard-axis anisotropy term $DS_z^2$ with $D > 0$. The most remarkable manifestation of the TQPT is a ju
Externí odkaz:
http://arxiv.org/abs/2312.17702
Publikováno v:
Mach. Learn.: Sci. Technol. 5 025048 (2024)
We explore the possibility of fully replacing a plasma physics kinetic simulator with a graph neural network-based simulator. We focus on this class of surrogate models given the similarity between their message-passing update mechanism and the tradi
Externí odkaz:
http://arxiv.org/abs/2310.17646
Autor:
Cruz, Fábio, Grismayer, Thomas, Chen, Alexander Y., Spitkovsky, Anatoly, Fonseca, Ricardo A., Silva, Luis O.
Publikováno v:
A&A 690, A229 (2024)
Global particle-in-cell (PIC) simulations of pulsar magnetospheres are performed with a volume, surface and pair production-based plasma injection schemes to systematically investigate the transition between electrosphere and force-free pulsar magnet
Externí odkaz:
http://arxiv.org/abs/2309.04834