Zobrazeno 1 - 10
of 1 377
pro vyhledávání: '"Almeida, C. A. S."'
Examining the $\phi^{4n}$ and $\phi^{8n}$ models within a two-dimensional framework in flat spacetime and embracing a theory with unconventional kinetic terms, one investigates the emergence of compactified double kinks/antikinks. We restrict our stu
Externí odkaz:
http://arxiv.org/abs/2408.04761
Publikováno v:
The European Physical Journal Plus, 139 (9) (2024) 845
Revisiting Einstein's gravitational theory, we build a five-dimensional braneworld. Within this framework, one announces the appearance of symmetric and asymmetric domain walls. Furthermore, it examines the emergent four-dimensional gravity from a th
Externí odkaz:
http://arxiv.org/abs/2407.14693
Revisiting the issue associated with Position-Dependent Mass (PDM), we reaffirm that the appropriate framework for addressing a generic PDM is the symmetrization proposed by BenDaniel and Duke. To accomplish this result adopts the effective mass Hami
Externí odkaz:
http://arxiv.org/abs/2406.05899
We study a generalized $\phi^4$ model that gives rise to BPS kink/antikink configurations with compacton-like profiles. One observes that the positive parameter controlling the generalizing function promotes an infinity degenerescence of the BPS solu
Externí odkaz:
http://arxiv.org/abs/2404.13413
Considering the relativistic scenario, we dedicate our study to the relativistic quantum description of one-dimensional Majorana fermions. Thus, we focus on aspects related to exciton-like particles. Seeking to reach our purpose, one analyzes the rel
Externí odkaz:
http://arxiv.org/abs/2404.05978
Publikováno v:
JCAP 05 (2024) 123
Einstenian cubic gravity (ECG) is a modified theory of gravity constructed with cubic contractions of the curvature tensor. This theory has the remarkable feature of having the same two propagating degrees of freedom of Einstein gravity (EG), at the
Externí odkaz:
http://arxiv.org/abs/2312.06588
Autor:
Moreira, A. R. P., Almeida, C. A. S.
Publikováno v:
General Relativity and Gravitation, 55 (2023) 89
In this work, the influence of the boundary term $B$ is analyzed in a string-like thick brane scenario in the gravity context $f(T, B)$. For that, three models of $f(T, B)$ are proposed, i.e., $f_1(T, B)=T+k{B}^{n}$, $f_2(T, B)=T+k(-T+B)^{n}$ and $f_
Externí odkaz:
http://arxiv.org/abs/2311.07898
We investigate the effects of the curved geometry on a massless relativistic electron constrained to a graphene strip with a Moebius strip shape. The anisotropic and parity-violating geometry of the Moebius band produces a geometric potential that in
Externí odkaz:
http://arxiv.org/abs/2309.12609
Autor:
Almeida, C. A. S., Lima, F. C. E.
Adopting the premise that the expected value of the quantum fluctuating metric is linear, i.e., $\langle g^{\mu\nu}\rangle=\alpha g^{\mu\nu}$, we analyze the modified gravity theory induced by the Einstein-Hilbert action coupled to a matter field. Th
Externí odkaz:
http://arxiv.org/abs/2307.05879
Publikováno v:
Phys. Scr. 99 (2024) 0659c2
We study the properties of a two-dimensional non-relativistic electron gas (TDEG) constrained on wires along a M\"{o}bius strip. We considered wires around the strip and along the transverse direction, across the width of the strip. For each directio
Externí odkaz:
http://arxiv.org/abs/2303.05647