Zobrazeno 1 - 10
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pro vyhledávání: '"Gomes, A R"'
In this work, we investigate the dynamics of a scalar field in the nonintegrable $\displaystyle \phi ^{4}$ model, restricted to the half-line. Here we consider singular solutions that interpolate the Dirichlet boundary condition $\phi(x=0,t)=H$ and t
Externí odkaz:
http://arxiv.org/abs/2411.04343
Autor:
Gomes, Adalto R., Simas, Fabiano C.
In this paper, we present topological defects in $(1,1)$ dimensions, described by an extended nonlinear $O(3)$ sigma model. We consider spherical coordinates $(\phi,\chi)$ in the $S^2$ isotopic space and a potential $V(\phi,\chi)$. For specific forms
Externí odkaz:
http://arxiv.org/abs/2410.10445
This work reports an extensive study of three-dimensional topological ordered phases that, in one of the directions behave like usual topological order concerning mobility of excitations, but in the perpendicular plane manifest type-II fracton physic
Externí odkaz:
http://arxiv.org/abs/2406.19275
At present, the main satellites of Uranus are not involved in any low order mean motion resonance (MMR). However, owing to tides raised in the planet, Ariel and Umbriel most likely crossed the 5/3 MMR in the past. Previous studies on this resonance p
Externí odkaz:
http://arxiv.org/abs/2403.17897
Mutual gravitational interactions between the five major Uranian satellites raise small quasi-periodic fluctuations on their orbital elements. At the same time, tidal interactions between the satellites and the planet induce a slow outward drift of t
Externí odkaz:
http://arxiv.org/abs/2403.17896
Publikováno v:
Phys. Rev. B 109, (2024) 075164
In this work, we study unconventional anisotropic topologically ordered phases in $3d$ that manifest type-II fractonic physics along submanifolds. While they behave as usual topological order along a preferred spatial direction, their physics along p
Externí odkaz:
http://arxiv.org/abs/2310.12894
The evolution of the five largest satellites of Uranus during the crossing of the 5/3 mean motion resonance between Ariel and Umbriel is strongly affected by chaotic motion. Studies with numerical integrations of the equations of motion and analysis
Externí odkaz:
http://arxiv.org/abs/2309.04786
Publikováno v:
Santos, R.C.B., Hernaski, C.A. & Gomes, P.R.S. Bosonization, duality, and the C-theorem in the non-abelian Thirring model. J. High Energ. Phys. 2023, 172 (2023)
We revisit the two dimensional non-Abelian Thirring model in order to investigate its fixed point structure and the corresponding renormalization group (RG) flow. For this purpose we discuss the bosonization of the model, and we present different, bu
Externí odkaz:
http://arxiv.org/abs/2305.11113
Publikováno v:
A&A 674, A111 (2023)
The orbits of the main satellites of Uranus are expected to slowly drift away owing to tides raised in the planet. As a result, the 5/3 mean motion resonance between Ariel and Umbriel was likely encountered in the past. Previous studies have shown th
Externí odkaz:
http://arxiv.org/abs/2305.08794
Publikováno v:
A&A 690, A131 (2024)
This work aims to develop a computationally inexpensive approach, based on machine learning techniques, to accurately predict thousands of stellar rotation periods. The innovation in our approach is the use of the XGBoost algorithm to predict the rot
Externí odkaz:
http://arxiv.org/abs/2305.02407